Answer:
The correct answers are:c. 2N₂O₅(g) ⇄ 4 NO₂(g)+ O₂(g), and
d. N₂O₄(g) ⇄ 2 NO₂(g)
Explanation:
Volume and pressure are inversely related (Boyle's law).
Volume and number of molecules are directly related (Avogadro's principle).
As per Le Chatelier's principle, the reaction will shift toward the side that permits to overcome or minimize the force that disturbs the equilibrium.
With those concepts you can predict which equilibria will shift toward formation of more products if the volume of a reaction mixture at equilibrium increases by a factor of 2
Let's dig into each option.
a. 2 SO₂(g)+ O₂(g) ⇄ 2 SO3(g)
Incorrect.
There are three molecules in the reactant side and two in the product side. so the increase in volume will favor the reverse reaction. This is, the equilibrium will shift to the formation of more reactants, and this is an incorrect choice.
b. NO(g) + O₃(g) ⇄ NO₂(g) + O₂(g)
Incorrect.
There are the same number of molecules in the reactant side and the product side. Hence, the increase of volume will not produce a change in the equlibrium.
c. 2N₂O₅(g) ⇄ 4 NO₂(g)+ O₂(g)
Correct.
There are 2 molecules in the reactant side (left) and four molecules in the product side (right). So, the increase in volume in this system will produce a shift toward the product side.
d. N₂O₄(g) ⇄ 2 NO₂(g)
Correct.
There are more molecules in the product side than in the reactant side, so you predict that the equilibrium will shift toward the formation of more product to overcome the increase of volume.
Equilibrium shift is the shift of the reaction towards the stressed conditions in the reactions. The shift towards the formation of the products will occur in [tex]\rm 2N_{2}O_{5}(g) \rightleftharpoons 4 NO_{2}(g)+ O_{2}(g)[/tex] and [tex]\rm N_{2}O_{4}(g) \rightleftharpoons 2 NO_{2}(g)[/tex].
What is the equilibrium shift?According to the Le principle the reaction shift towards the site or the reactants and products where the disturbance or the stress is present so that it can be overcome.
In the third equation reaction, [tex]\rm 2N_{2}O_{5}(g) \rightleftharpoons 4 NO_{2}(g)+ O_{2}(g)[/tex] the number of the molecules on the left side is 2 and on the right side of the product have 4 molecules. When the volume is increased then the reaction shifts towards the right or the product side.
In the fourth reaction, [tex]\rm N_{2}O_{4}(g) \rightleftharpoons 2 NO_{2}(g)[/tex] the number of the products are more compared to the reactants and hence the increase in the volume will shift the reaction towards the formation of the product.
Therefore, option c. [tex]\rm 2N_{2}O_{5}(g) \rightleftharpoons 4 NO_{2}(g)+ O_{2}(g)[/tex] and option d. [tex]\rm N_{2}O_{4}(g) \rightleftharpoons 2 NO_{2}(g)[/tex] are the reactions that shift towards product formation.
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When the reaction 3 no(g) → n2o(g) + no2(g) is proceeding under conditions such that 0.015 mol/l of n2o is being formed each second, the rate of the overall reaction is ? and the rate of change for no is ?
Answer:
1) The rate of the overall reaction = Δ[N₂O]/Δt = 0.015 mol/L.s.
2) The rate of change for NO = - Δ[NO]/Δt = 3 Δ[N₂O]/Δt = 0.045 mol/L.s.
Explanation:
For the reaction:3NO(g) → N₂O(g) + NO₂(g).
The rate of the reaction = -1/3 Δ[NO]/Δt = Δ[N₂O]/Δt = Δ[NO₂]/Δt.
Given that: Δ[N₂O]/Δt = 0.015 mol/L.s.
1) The rate of the overall reaction is?
The rate of the overall reaction = Δ[N₂O]/Δt = 0.015 mol/L.s.
2) The rate of change for NO is?
The rate of change for NO = - Δ[NO]/Δt.
∵ -1/3 Δ[NO]/Δt = Δ[N₂O]/Δt.
∴ The rate of change for NO = - Δ[NO]/Δt = 3 Δ[N₂O]/Δt = 3(0.015 mol/L.s) = 0.045 mol/L.s.
The overall reaction rate is 0.015 mol/L·s, and the rate of change for NO is -0.045 mol/L·s. This is based on the stoichiometric coefficients in the balanced equation 3 NO(g) → N₂O(g) + NO₂(g). For every mole of N₂O formed, 3 moles of NO are consumed.
To find the rate of the overall reaction and the rate of change for NO in the reaction 3 NO(g) → N₂O(g) + NO₂(g), we start with the given information that 0.015 mol/L of N₂O is being formed each second. This implies the rate of formation of N₂O is 0.015 mol/L·s.
The rate of the reaction can be expressed using the stoichiometric coefficients from the balanced equation. Since 3 moles of NO are consumed for every 1 mole of N₂O formed, the rate of the reaction in terms of N₂O formation is:
Rate of reaction = (1/1) × 0.015 mol/L·s = 0.015 mol/L·s
Next, for the rate of change of NO, we consider the stoichiometry of the reaction. For each mole of N₂O formed, 3 moles of NO are consumed. Thus, the rate of change for NO is:
Rate of change for NO = -3 × (rate of formation of N₂O)
This gives us:
Rate of change for NO = -3 × 0.015 mol/L·s = -0.045 mol/L·s
In a calorimeter, 1.0 kg of ice melts at 0c. The enthalpy of fusion of the ice is 334 j/g. How much heat was absorbed?
= 334 kJ
Explanation;Given: 1 kg or 1000 g of ice melts at 0°C.
The enthalpy of fusion of the ice is 334 J/g
We know that; Quantity of heat absorbed = mLf
Therefore
Q = (1000 g) (334 J/g)
= 334,000 J
334,000 J * 1kJ/1000J
= 334 kJ
Answer:
In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g.
How much heat was absorbed?
-33.4 J
-334 kJ
-334 J
-33.4 kJ (THIS IS THE ANSWER ) !!!!!
you can do it
During a hot and humid day, large and dense clouds known as cumulonimbus clouds form. In many cases these clouds will result in ______________. A) hurricanes B) snowstorms C) thunderstorms D) pleasant weather
the answer is c- thunderstorms
____________ tautomers have a C=O and an additional C-H bond.
Ch = sh = why and find the stuff
Why does adding sodium chloride to a saturated solution of lead chloride reduce the solubility of PbVI2?
Answer:
B) Equilibrium is pushed towards the left in the equation
PbCl2 -> Pb+2 + 2Cl-
Explanation:
We have a saturated solution of PbCl2. It means the maximum amount of PbCl2 is dissolved in the solution. If we add sodium Chloride - NaCl, the solubility will be reduced.
NaCl will dissolve into the solution forming Na+ and Cl- ions. Cl- ions are common for the PbCl2 and NaCl. The effect of increasing Cl- ions due to the NaCl will reduce the solubility of PbCl2.
It means if we add Cl- ions or Pb+2 ions independent from the component apportioning them, the solubility will be reduced for the PbCl2, and the equilibrium will be pushed towards the left in the equation
PbCl2 -> Pb+2 + 2Cl-
Finally, we can conclude that the answer is B) Equilibrium is pushed towards the left in the equation:
PbCl2 -> Pb+2 + 2Cl-
Adding sodium chloride to a saturated solution of lead chloride reduce the solubility of PbVI2 because equilibrium is pushed towards the left in the equation PbCl2 → Pb+2 + 2Cl-. Therefore, option B is correct.
What is lead chloride ?Under normal environmental circumstances, the inorganic compound lead(II) chloride is a white solid. It does not dissolve well in water. One of the most crucial lead-based reagents is lead(II) chloride. Additionally, it can be found naturally as the mineral cotunnite.
Lead nitrate is reacted with sodium chloride or hydrochloric acid to produce lead(II) chloride. It can also be produced by mixing hydrochloric acid with lead(IV) oxide. Lead and chlorine can also be reacted to create it.
Due to the additional Cl-, the reaction quotient for PbCl2 exceeds the equilibrium constant. As a result, this causes precipitation and lowers the reaction's present solubility, shifting the reaction to the left in the direction of equilibrium. Overall, adding sodium chloride causes the reaction's solubility to decrease.
Thus, option B is correct.
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Which of the following functions occurs in the part of the digestive system indicated by the arrow?Secretion of buffers and digestive enzymesAcid breakdown of swallowed foodsSecretion of bile and buffersAbsorption of water and ions
What are the different types of energy involved when you lift your book bag off the floor and drop it?
Kinetic energy can be one of them and potential because when u hold the book bag before dropping it there is potential energy happening
Consider a pure crystalline solid that is heated from absolute zero to a temperature above the boiling point of the liquid. Which of the following processes produces the greatest increase in the entropy of the substance? A) melting the solid B) heating the liquid C) heating the gas D) heating the solid E) vaporizing the liquid
The answer is a. Melting the solid.
Consider the following balanced equation: SiO2(s)+3C(s)→SiC(s)+2CO(g) Complete the following table showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, as well as the moles of each product formed. If the number of moles of a product is provided, fill in the required amount of each reactant to make that amount of product, as well as the amount of the other product that is made.
Mol SiO2 Mol C Mol SiC Mol CO
Row 1: 3 _____ _____ _____
Row 2: _____ 6 _____ _____
Row 3: _____ _____ _____ 16
Row 4: 2.8 _____ _____ _____
Row 5: _____ 2.45 _____ _____
A. complete the first row. Express your answers using one significant figure separated by commas. Mol C, Mol SiC, Mol CO =
B. Complete the second row. Express your answers using one significant figure separated by commas. Mol SiO2, Mol SiC, Mol CO =
C. Complete the third row. Express your answers using two significant figures separated by commas. Mol SiO2, Mol C, Mol SiC =
D. Complete the fourth row. Express your answers using two significant figures separated by commas. Mol SiO2, Mol C, Mol SiC =
E. Complite the fifth row. Express your answers using three significant figures separated by commas. Mol SiO2, Mol SiC, Mol CO =
Answer:
mol(SiO₂) mol(C) mol(SiC) mol(CO)
Row 1: 0.8 x 10 0.9 x 10 0.3 x 10 0.6 x 10
Row 2: 0.2 x 10 0.6 x 10 0.2 x 10 0.4 x 10
Row 3: 8.0 2.4 x 10 8.0 1.6 x 10
Row 4: 2.8 8.4 2.8 5.6
Row 5: 0.816 2.45 0.816 1.63
Explanation:
From the balanced equation:SiO₂(s) + 3C(s) → SiC(s) + 2CO(g),
It is clear that 1.0 mole of SiO₂ reacts with 3.0 moles of C to produce 1.0 mole of SiC and 2.0 moles of CO.
We can complete the table of no. of moles of each component:A. complete the first row. Express your answers using one significant figure separated by commas. Mol C, Mol SiC, Mol CO =
3.0 moles of SiO₂:
We use the triple amount of SiO₂, so we multiply the others by 3.0.
So, it will be 3.0 moles of SiO₂ with 9.0 moles of C that produce 3.0 moles of SiC and 6.0 moles of CO.
B. Complete the second row. Express your answers using one significant figure separated by commas. Mol SiO2, Mol SiC, Mol CO =
6.0 mole of C:
We use the double amount of C, so we multiply the others by 2.0.
So, it will be 2.0 moles of SiO₂ with 6.0 moles of C that produce 2.0 moles of SiC and 4.0 moles of CO.
C. Complete the third row. Express your answers using two significant figures separated by commas. Mol SiO2, Mol C, Mol SiC =
16.0 moles of CO:
We use the amount of CO higher by 8 times than that in the balanced equation, so we multiply the others by 8.0.
So, it will be 8.0 moles of SiO₂ with 24.0 moles of C that produce 8.0 moles of SiC and 16.0 moles of CO.
D. Complete the fourth row. Express your answers using two significant figures separated by commas. Mol SiO2, Mol C, Mol SiC =
2.8 moles of SiO₂:
We use the amount of SiO₂ higher by 2.8 times than that in the balanced equation, so we multiply the others by 2.8.
So, it will be 2.8 moles of SiO₂ with 8.4 moles of C that produce 2.8 moles of SiC and 5.6 moles of CO.
E. Complite the fifth row. Express your answers using three significant figures separated by commas. Mol SiO2, Mol SiC, Mol CO =
2.45 moles of C:
We use the amount of C lower by 0.8167 times than that in the balanced equation, so we multiply the others by 0.8167.
So, it will be 0.8167 moles of SiO₂ with 2.45 moles of C that produce 0.8167 moles of SiC and 1.633 moles of CO.
The answers are expressed in the required significant figures in the answer part (table above).
Answer:
A) [tex]3SiO_2(s)+9C(s)\rightarrow 3SiC(s)+6CO(g)[/tex]
B) [tex]2SiO_2(s)+6C(s)\rightarrow 2SiC(s)+4CO(g)[/tex]
C)[tex]8.0SiO_2(s)+24C(s)\rightarrow 8.0SiC(s)+16CO(g)[/tex]
D)[tex]2.8SiO_2(s)+8.4C(s)\rightarrow 2.8SiC(s)+5.6CO(g)[/tex]
E)[tex]0.816SiO_2(s)+2.45C(s)\rightarrow 0.816SiC(s)+1.63CO(g)[/tex]
Explanation:
[tex]SiO_2(s)+3C(s)\rightarrow SiC(s)+2CO(g)[/tex]
A) When 3 moles of silicon dioxide are present.
According to reaction 1 mole of silicon dioxide react with 3 moles of carbon to give 1 mole of silicon carbide and 2 moles of carbon monoxide.
Then 3 moles of silicon dioxide will react with :
[tex]\frac{3}{1}\times 3mol=9 mol[/tex] of carbon
Then 3 moles of silicon dioxide will give :
[tex]\frac{1}{1}\times 3 mol= 3 mol[/tex] of silicon carbide
Then 3 moles of silicon dioxide will give :
[tex]\frac{2}{1}\times 3 mol= 6 mol[/tex] of carbon monoxide
[tex]3SiO_2(s)+9C(s)\rightarrow 3SiC(s)+6CO(g)[/tex]
B) When 6 moles of carbon are present.
According to reaction 3 moles of carbon reacts with 1 mole of silicon dioxide react with to give 1 mole of silicon carbide and 2 moles of carbon monoxide.
Then 6 moles of carbon will react with :
[tex]\frac{1}{3}\times 6 mol=2 mol[/tex] of silicon dioxde
Then 3 moles of carbon will give :
[tex]\frac{1}{3}\times 6 mol= 2 mol[/tex] of silicon carbide
Then 6 moles of carbon will give :
[tex]\frac{2}{3}\times 6 mol= 4 mol[/tex] of carbon monoxide
[tex]2SiO_2(s)+6C(s)\rightarrow 2SiC(s)+4CO(g)[/tex]
C)When 6 moles of carbon are present.
According to reaction ,1 mole of silicon carbide and 2 moles of carbon monoxide is produced when, 3 moles of carbon reacts with 1 mole of silicon dioxide reacts.
Then 16 moles of carbon monoxide will be produced from :
[tex]\frac{1}{2}\times 16 mol=8 mol[/tex] of silicon dioxide
Then 16 moles of carbon monoxide will give :
[tex]\frac{3}{2}\times 16 mol= 24 mol[/tex] of carbon
Along with 16 moles of carbon monoxide will give :
[tex]\frac{1}{2}\times 16 mol= 8 mol[/tex] of silicon carbide
[tex]8SiO_2(s)+24C(s)\rightarrow 8SiC(s)+16CO(g)[/tex]
D) When 2.8 moles of silicon dioxide are present.
According to reaction 1 mole of silicon dioxide react with 3 moles of carbon to give 1 mole of silicon carbide and 2 moles of carbon monoxide.
Then 2.8 moles of silicon dioxide will react with :
[tex]\frac{3}{1}\times 2.8 mol=8.4 mol[/tex] of carbon
Then 2.8 moles of silicon dioxide will give :
[tex]\frac{1}{1}\times 2.8 mol= 2.8 mol[/tex] of silicon carbide
Then 2.8 moles of silicon dioxide will give :
[tex]\frac{2}{1}\times 2.8 mol= 5.6 mol[/tex] of carbon monoxide
[tex]2.8SiO_2(s)+8.4C(s)\rightarrow 2.8SiC(s)+5.6CO(g)[/tex]
E) When 2.45 moles of carbon are present.
According to reaction 3 moles of carbon reacts with 1 mole of silicon dioxide react with to give 1 mole of silicon carbide and 2 moles of carbon monoxide.
Then 2.45 moles of carbon will react with :
[tex]\frac{1}{3}\times 2.45 mol=0.8166 mol[/tex] of silicon dioxde
Then 3 moles of carbon will give :
[tex]\frac{1}{3}\times 2.45 mol= 0.8166 mol[/tex] of silicon carbide
Then 6 moles of carbon will give :
[tex]\frac{2}{3}\times 2.45 mol= 1.6333 mol[/tex] of carbon monoxide
[tex]0.816SiO_2(s)+2.45C(s)\rightarrow 0.816SiC(s)+1.63CO(g)[/tex]
Calculate the silver ion concentration in a saturated solution of silver(i) sulfate (ksp = 1.4 × 10–5).
Answer:
= 0.030 M
Explanation:
We can take x to be the concentration in mol/L of Ag2SO4 that dissolves
Therefore; concentration of Ag+ is 2x mol/L and that of SO4^2- x mol/L.
Ksp = 1.4 x 10^-5
Ksp = [Ag+]^2 [SO42-]
= (2x)^2(x)
= 4x^3
Thus;
4x^3 = 1.4 x 10^-5
= 0.015 M
molar solubility = 0.015 M
But;
[Ag+]= 2x
Hence; silver ion concentration is
= 2 x 0.015 M
= 0.030 M
Final answer:
The silver ion concentration in a saturated solution of silver(I) sulfate with a Ksp of 1.4 × 10–5 is approximately 1.52 × 10–2 M.
Explanation:
To calculate the silver ion concentration in a saturated solution of silver(I) sulfate, first we must understand that the dissolution of silver sulfate, Ag2SO4, in water can be represented by the equation:
Ag2SO4(s) ⇌ 2Ag+(aq) + SO42-(aq)
Applying the solubility product constant (Ksp), the equilibrium constant expression for this dissolution can be written as:
Ksp = [Ag+]2[SO42-]
Given that the Ksp for silver(I) sulfate is 1.4 × 10–5, and assuming that the concentrations of silver and sulfate ions are equal to their stoichiometric coefficients, we can set up the equation:
1.4 × 10–5 = x2[SO42-]
Where x is the molar concentration of Ag+. Since there are two moles of Ag+ for every mole of Ag2SO4 that dissolves, we can express the sulfate ion concentration as [SO42-] = x, which simplifies the equation to:
1.4 × 10–5 = (2x)2x
Now we can solve for x:
1.4 × 10–5 = 4x3
x3 = 3.5 × 10–6
x ≈ 1.52 × 10–2 M
So the concentration of silver ions, [Ag+], in a saturated solution of silver(I) sulfate is approximately 1.52 × 10–2 M.
All metals a melt at high temperatures b conduct heat and electricity c contain iron d react with air and water
The correct answer is B.
Why would two poles of different magnets attract each other?
When two magnets are brought near each other, like poles repel; opposite poles attract. When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.
Answer:
The poles closest to each other are opposite poles.
Explanation:
Which is a system of applied science used to provide people with things they need or desire
Technology
Explanation;Applied science entails the application of knowledge from one or more natural scientific fields to solving practical problems.Technology is a specific system of applied science. It is a means by which a society provides it's members with things they need/desire.The main aim of technology is to create products that solve problems and improve human life. It is a practical application of sciencewhat happens in the space above the soft drink in a closed bottle or can as the soft drink warms to room temperature
When a soft drink starts to warm to room temperature, the air at the top of the can or bottle starts to sink into the water creating more bubbles and/or fizz. The space at the top of the can or bottle starts to shrink up.
Answer:
As the refrigerant begins to warm up to room temperature, the air inside the bottle that is between the refrigerant and the bottle cap begins to slowly come down. As you might already imagine, air in contact with the liquid can generate bubbles, and this is what happens when the air in the bottle starts to drop as the soda heats up.
Explanation:
You have seen that at room temperature it is common for soda to overflow bubbles. This is because the air inside the soda bottle begins to come down and when it comes in contact with the liquid causes a lot of bubbles and can even make the soda overflow.
Consider the following balanced equation. SiO2(s)+3C(s)→SiC(s)+2CO(g) Complete the following table, showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, as well as the moles of each product formed. If the number of moles of a product is provided, fill in the required amount of each reactant to make that amount of product, as well as the amount of the other product that is made. molSiO2 molC molSiC molCO _____ 9 _____ _____ 1 _____ _____ _____ _____ _____ _____ 26 _____ 7.5 _____ _____ 1.4 _____ _____ _____ Part A Complete the first row.
Using stoichiometry and the balanced chemical equation provided, the first row of the table is completed with 3 moles of SiO₂, 9 moles of C, 3 moles of SiC, and 6 moles of CO.
The student's question involves completing a table for a chemical reaction with known mole ratios. The balanced equation is SiO₂(s) + 3C(s) ightarrow SiC(s) + 2CO(g). To complete the table for the first row where 9 moles of carbon (C) are provided, we apply stoichiometry based on the balanced equation:
For every 3 moles of C used, 1 mole of SiO₂ is required, so 9 moles of C would need 9/3 = 3 moles of SiO₂.
For every 3 moles of C, 1 mole of SiC is produced, so 9 moles of C will yield 9/3 = 3 moles of SiC.
Each mole of SiO₂ reacts to form 2 moles of CO, so for 3 moles of SiO₂, we will get 3 × 2 = 6 moles of CO.
Therefore, the completed first row is: 3 moles of SiO₂, 9 moles of C, 3 moles of SiC, and 6 moles of CO.
Using the ratio of the given balanced equation, the completed tabel is:
molSiO2 molC molSiC molCO
3 9 3 6
1 3 1 2
13 39 13 26
2.5 7.5 2.5 5.0
1.4 4.2 1.4 2.8
From the question, we are to complete the given table:
molSiO2 molC molSiC molCO
_____ 9 _____ _____
1 _____ _____ _____
_____ _____ _____ 26
_____ 7.5 _____ _____
1.4 _____ _____ _____
The given balanced chemical equation is:
SiO₂(s) + 3C(s) → SiC(s) + 2CO(g)
This means
1 mole of SiO₂ is required to react with 3 moles of C to produce 1 mole of SiC and 2 moles of CO
The ratio of equation is:
1 : 3 : 1 : 2
Using this ratio, we can complete the given table
Thus,
Using the ratio of the balanced equation, the completed tabel is
molSiO2 molC molSiC molCO
3 9 3 6
1 3 1 2
13 39 13 26
2.5 7.5 2.5 5.0
1.4 4.2 1.4 2.8
In a concentrated solution there is _____.
A. no solvent
B. a small amount of solute
C. a large amount of solute
D. no solute
Answer:
C. a large amount of solute
Explanation:
To make a solution we need both solute and solvent. Therefore both options A and D are incorrect. In a dilute solution there is a lower concentration of solute dissolved in the solvent. Therefore option B is incorrect. In a concentrated solution there is a higher concentration of solute dissolved in the solvent. Therefore option C is correct.
In the concentrated solution there is "large amount of the solute". The correct option is C.
The concentrated solution is the solution in which the solution contains a large amount of the solute as compared to the amount that could be dissolve. When the amount of the solute added to the solvent is in the large amount that could be dissolve then the solution is referred as the concentrated solution.
The concentration of the solution is the measurement of the amount of the solute which is dissolved in the amount of solution or the solvent. The concentrated solution becomes more solute when we added the more solute. Therefore, the option C is correct.
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Which factors would decrease the rate of a reaction? I. Lowering the temperature II. Increasing the concentration of reactants III. Adding a catalyst
Answer:
(for those of us with 4 answer choices)
Explanation:
a p e x
A factor that will decrease the rate of chemical reaction is lowering the temperature.
The rate of a chemical reaction is the speed at which a chemical reaction takes place. The rate of chemical reaction is directly proportional to the concentration of the reactant and the temperature of the reactant.
That is, as the temperature of the reactant increases, the rate of the reaction increases, while a decrease in temperature will decrease the rate of reaction.
Thus, a factor that will decrease the rate of chemical reaction is lowering the temperature.
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If a piece of space debris is too large to be a meteoroid and too small to be a planet, it could be _______.
I think it could be "an asteroid" .
Liquids that dissolve freely in one another in any proportion are
dgdfasfdsafdsagdfggxcvxcvxczgdfsgsdfhgfghfjghfgfhjgfd
Help me please.
Why does Earth rotate?
a.)Because Earth is formed from cold gases collapsing due to gravity
b.)Because the matter in the nebula that formed Earth was spinning
c.)Because Earth forms more than 99% of the mass of the solar system
d.)Because the hydrogen atoms inside the nebula fused to form helium
I think it's B but I'm not 100% sure srry if I'm wrong
The word root for a group of microorganisms living together is a. steriliz. b. prodrom. c. coloniza. d. nosocomi.
The answer is C) Coloniza.
This is the sweetest of all natural sugars.
Fructose O_O
Fructose is the sweetest of the naturally-occurring sugars.
Fructose is the sweetest of all natural sugars, found in fruits, vegetables, honey, and high fructose corn syrup. It is used by plants to attract insects and animals, facilitating pollination and seed dispersal. Sucrose and lactose are other natural sugars with differing sweetness levels and roles.
Explanation:The question pertains to the identification of the sweetest of all natural sugars. The answer is fructose, which is a monosaccharide that surpasses other sugars in sweetness. Naturally occurring in fruits, vegetables, honey, and high fructose corn syrup, fructose plays a significant role in the diet and the ecosystem.
Sugars like sucrose and lactose are also prevalent in our diets, coming from sources such as sugar cane, sugar beets, and dairy, respectively. Sucrose, commonly known as table sugar, and lactose, known as milk sugar, have their unique roles and sweetness profiles. However, fructose is distinguished by its exceptional sweetness and is employed by plants as a strategy to attract insects for pollination and animals for seed dispersal, creating a beneficial relationship between fauna and flora.
Understanding the types of naturally occurring sugars and their sources can contribute significantly to our knowledge of diet, nutrition, and ecosystem interdependencies.
If I have 12 moles of gas with a temperature of 16°C, what is the volume of the gas if the pressure is 14atm
Answer:
20.3 L
Explanation:
Assuming that the gas behaves similar to an ideal gas we can use the ideal gas law equation
PV = nRT
Where
P - pressure - 14 atm
V - volume
n - number of moles - 12 mol
R - universal gas constant - 0.0821 L.atm /mol.K
T - absolute temperature - 16 degrees + 273 = 289 K
Substituting the values in the equation
14 atm x V = 12 mol x 0.0821 L.atm/mol.K x 289 K
V = 20.3 L
Which of the following explains the increase in reaction rate caused by raising the temperature or raising the pressure of a system?
a) surface area theory
b) activation energy theory
c) potential energy theory
d) collision theory
The increase in reaction rate caused by raising the temperature or pressure is explained by collision theory, which states that reactions occur due to collisions with enough energy and proper orientation. Higher temperatures mean more energetic collisions, and increasing pressure leads to a higher frequency of collisions, both contributing to a faster reaction rate.
Explanation:The increase in reaction rate due to raising the temperature or raising the pressure of a system can be explained by d) collision theory. Collision theory posits that chemical reactions occur when reactants collide with sufficient energy and correct orientation. An increase in temperature leads to a greater number of collisions because particles move faster and have more energy, which can be converted into activation energy in a collision. Furthermore, the collisions are more forceful, making it more likely for the reactants to overcome the activation energy barrier and form products, hence increasing the rate of reaction.
Similarly, increasing the pressure in a system typically means more particles are forced into a smaller volume, thus increasing the frequency of collisions. This is especially true for reactions involving gases, where an increase in pressure often corresponds to an increase in concentration, further facilitating more frequent collisions and potentially a faster reaction rate.
99 points
Fluorine, a nonmetal, has an Electronegativity value of 4.0, and Chlorine, a nonmetal, has a value of 3.0. The type of bond formed will be:
ionic
covalent
metallic
no way to determine the type of bond formed
➷ It would be a covalent bond most likely. It cannot be an ionic bond as the two elements have the same number of electrons. It also couldn't be a metallic bond as they are obviously not metals.
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The following is true for electronegativity and the bonds formed between atoms:
If the difference in electronegativity is between 0 to 0.4, then the type of bond formed will likely be covalent.If the difference is between 0.5 to 1.7, the bond is likely going to be polar covalent.If the difference is greater than 1.8, then the bond will likely be ionic.The difference in electromagnetically is 1.0 (4.0-3.0=1.0). Thus, the bond will be polar covalent, which is a type of covalent bond.
Let me know if you need any clarifications, thanks!
~ Padoru
Which of these is an alcohol
The answer is D!
Here is a website to prove my answer:
https://chemstuff.co.uk/unit-2/functional-groups/
Must show work for questions 5 and 6. (Please also explain, I don't understand)
4. Consider the reaction. Which of the following is true?
5. What is the specific heat of Hg if it requires 166.7 J to change the temperature of 15.0 g mercury from 25.00°C to 33.00°C?
6. Consider the reaction. When a 17.2-g sample of ethyl alcohol (molar mass = 46.1 g/mol) is burned, how much energy is released as heat?
Answer:
4. E) Both A) and C) are true.
5. D) 1.39 J·°C⁻¹g⁻¹
6. C) 5.11 × 10² kJ
Step-by-step explanation:
4. Heat of reaction
H₂(g) + ½O₂(g) ⟶ H₂O(ℓ); ΔH° = -286 kJ
A) The negative sign tells you that energy has gone out of the system. Therefore, the reaction is exothermic.
B) is wrong. The reaction is exothermic.
C) If energy has left the system (and the products are part of the system), the enthalpy of the products is less than that of the reactants,
D) is wrong. Energy is released from the system.
E) Both A) and C) are correct, so E) is the correct answer.
5. Specific heat capacity
q = mCΔT
C = q/(mΔT)
Data:
q = 166.7 J
m = 15.0 g
T₁ = 25.00 °C
T₂ = 33.00 °C
Calculation:
ΔT = T₂ - T₁ = (33.00 - 25.00) °C = 8.00 °C
C = 166.7/(15.0× 8.00) = 1.39 J·°C⁻¹g⁻¹
The specific heat capacity of mercury is 1.39 J·°C·g⁻¹.
6. Heat of combustion
M_r: 46.1
C₂H₅OH + 3O₂ ⟶ 2CO₂ + 3H₂O; ΔH = -1.37 × 10³ kJ
m/g: 17.2
n =17.2/46.1 = 0.3731 mol
q = nΔH = 0.3731 × (-1.37 × 10³) = -511 kJ = -5.11 × 10² kJ
The reaction releases 5.11 × 10² kJ of heat.
In a covalent bond, what holds atoms together?
electrons that are shared between atoms
electrons that are transferred from one atom to another
protons that are transferred from one atom to another
a “sea of electrons” around many atoms
In covalent bonding, both atoms are trying to attract electrons--the same electrons. Thus, the electrons are shared tightly between the atoms.
The force of attraction that each atom exerts on the shared electrons is what holds the two atoms together.
Answer: Option (a) is the correct answer.
Explanation:
A covalent bond is defined as the bond which is formed due to sharing of electrons.
For example, a carbon atom has 4 valence electrons and a hydrogen atom has 1 valence electron.
So, when a carbon atom chemically combines with a hydrogen atom then sharing of electrons take place between the two and it results in the formation of a methane molecule.
[tex]C + 2H_{2} \rightarrow CH_{4}[/tex]
Whereas a bond in which transfer of electrons take place from one atom to another is known as an ionic bond.
For example, [tex]2Na + Cl_{2} \rightarrow 2NaCl[/tex]
Thus, we can conclude that in a covalent bond electrons that are shared between atoms holds atoms together.
which factor is most likely to determine which plants can survive in an area??(APEX)
A. types of animals
B. atmosphere pressure
C. amount of rainfall
D. human presence
The answer is c because some plants can die from too much water
Answer: C. amount of rainfall
Explanation:
The amount of rainfall is an abiotic factor (non-living) which is necessary for the growth of plants. The water from the rainfall is necessary for the large scale natural irrigation of an agricultural land, forest, meadow or grassland. The water enters into the soil and through the roots the water is absorbed by the plants.
If a region receives very low annual rainfall then the region may experience desertification. The soil will become compact and dry which cannot support the growth of plants.
If a region receives adequate rainfall then the soil will hold water it will remain fertile to support the diversity of plants.
Consider the same cycle with non-isentropic turbine and pump. (e) Plot the variation of net power output, rate of heat transfer through the boiler, and cycle thermal efficiency for equal values of isentropic efficiency for turbine and pump ranging from 70% to 100%. Suppose the cooling water circulating through the condenser enters at 22C (State 5) and exits at 35C (State 6) for the ideal cycle. The cooling water leaving the condenser enters a wet cooling tower and is cooled back to 22C by using ambient air entering the cooling tower at total pressure of 1 atm, dry bulb temperature of 20C, and relative humidity of 60% (State 7). The air exiting at the top of the cooling tower is saturated at 30C (State 8). There is make-up water supply at 22C (State 9). (f) Calculate the mass flow rate (kg/s) of cooling water. (g) Find the mass flow rate (kg/s) of air entering the cooling tower. (h) Determine the mass flow rate (kg/s) required of the make-up water in the cooling tower.
The 60% is the total of the humid y