Answer:
D. Ionic bond
Explanation:
First some definitions: ionic bonds always have metals that transfer electrons. Covalent bonds are between nonmetals that share electrons. (Sharing is caring!)
Li is a metal, so right off the bat we know this is not a covalent bond. However, it's not a metal, so we can cross off C as well. The phrase "paired bond" isn't common, so we know the answer must be D. ionic bond.
And in this bond, Li's electrons will transfer to O to make both have a full valence shell. (As opposed to covalent bonds, which share electrons, not transfer completely.)
If a neutral compound is composed of carbon and hydrogen and you know that it has exactly 2 carbons connected by a double bond, how many hydrogens will the compound have?
A. 4
B. 8
C. 2
D. 6
Answer: The answer is A. 4
Explanation: I just had this question on a quiz
The compound with two carbon atoms connected by a double bond is an alkene known as ethene or ethylene, and it has 4 hydrogens. The general formula for alkenes (CnH2n) confirms this, as 2 carbons (n=2) would correspond to 4 hydrogens.
Explanation:In the world of organic chemistry, a compound with two carbon atoms connected by a double bond is known as an alkene. The simplest alkene is ethene (also known as ethylene), which consists of 2 carbon (C) atoms connected by a double bond and 4 hydrogen (H) molecules. According to the general formula for alkenes, which is CnH2n, if n=2 (representing the 2 carbon atoms), the corresponding number of hydrogen atoms is 2*2, which equals to 4. Therefore, the correct answer is A. 4.
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What mass of water (H2O)will be collected if 20.0 grams of oxygen gas(H2) are consumed
2H2+O2-->2H2O
The mass of water should be 180g.
The calculation is as follows:[tex]no\ of\ mole\ of\ H2 = mass\div RAM[/tex]
[tex]=20\div 2(2)[/tex]
=5mol
And, the mass of water should be
[tex]=5mol\times 2(2+16)mol/g[/tex]
=180g
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Why is it often difficult to determine the actual pathway for a chemical reaction?
Answer:
Each step in a mechanism will have a transition state. The transition states are often very difficult to identify and during a reaction the molecules exist in this state for essentially zero time. ... It is more of a theoretical idea for the configurations the chemical species must pass through during the reaction.
Explanation:
Look at the chart showing the daily stock data for WebTrend Inc.’s stock over the past month, and read this stock analyst’s view of the stock:
10 points !
Stock analyst: There is a downward trend of the data with the peak price achieved on March 13. Investors are interested in WebTrend Inc. as demonstrated by the increase in trading volume.
Which statement is a fair conclusion based on the chart and the analyst’s comments about the WebTrend stock?
A.
The stock price increased and volume decreased on April 3.
B.
One month is not enough time to determine whether the price is at a low.
C.
The price has been falling, so an investor can assume it will begin to rise again soon.
D.
When the price change is negative for the day, an investor can assume the trading volume will decrease.
Answer: The answer to this question is B if you are taking the test on Plato.
Answer:
One month is not enough time to determine whether the price is at a low.
Explanation:
The equation to perform the calculation is shown
below.
3.45 mol KMnO, X
8 mol H2O
2 mol KMnO4
Did you set up the equation correctly?
0
Yes, and I got the correct answer.
Yes, but I got the wrong answer because I
made a mathematical error.
No, I did rt set up the equation correctly.
Answer: yes, and I got the correct answer
Explanation:
Yes, the equation has been set up correctly and the right answer is obtain. Therefore, option A is correct.
What is balance equation ?The balance equation is defined as when the total mass of the reactant is exactly equal to the total mass of the product. By the law of conservation of mass for balance equation both reactant and products mass are same.
The given equation for the reaction of potassium permanganate has been given as follows :
2 KMnO₄ + 16 HCl ⇒ 2MnCl₂ + 5Cl₂ + 8H₂O
The amount of water formed from 3.45 mol potassium per magnate has been given as follows:
2mol KMnO₄ = 8 mole of H₂O
3.45 mol KMnO₄ = 3.45 × 8/2 mole of H₂O
The given equation has been similar to the equation set up. Hence,the equation has been set up correctly and got the answer right.
Thus, option A is correct.
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The reaction 2CH4(g)⇌C2H2(g)+3H2(g) has an equilibrium constant of K = 0.154. If 6.30 mol of CH4, 4.20 mol of C2H2, and 11.15 mol of H2 are added to a reaction vessel with a volume of 6.00 L , what net reaction will occur?
Answer:
C₂H₂ + 3H₂ ⟶ 2CH₄
Explanation:
The initial concentrations are:
[CH₄] = 6.30 ÷ 6.00 = 1.05 mol·L⁻¹
[C₂H₂] = 4.20 ÷ 6.00 = 0.700 mol·L⁻¹
[H₂] = 11.15 ÷ 6.00 = 1.858 mol·L⁻¹
2CH₄ ⇌ C₂H₂ + 3H₂
I/mol·L⁻¹: 1.05 0.700 1.858
[tex]Q = \dfrac{\text{[C$_{2}$H$_{2}$][H$_{2}$]}^{3}}{\text{[CH$_{4}$]}^{2}} = \dfrac{ 0.700\times 1.858^{3}}{1.05^{2}}= 4.07[/tex]
Q > K
That means we have too many products.
The reaction will go to the left to get rid of the excess products.
C₂H₂ + 3H₂ ⟶ 2CH₄
if I add 1.50 L of water to 250 mL of a 12.5 M NaOH solution, what will the molarity of the diluted solution be?
Answer:
The molarity of the diluted solution is 1.786 M
Explanation:
Dilution is a process in which you always start with a concentrated solution to which a greater volume of solvent is added. This modifies the concentration and volume of the resulting solution, but the amount of solute used to prepare the initial solution remains the same.
In summary, in a dilution the amount of solute does not vary, but the volume of the solvent varies: when more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
The following rule is fulfilled:
Vinicial x Cinicial = Vfinal x Cfinal
where:
Vinicial = Initial volume. Cinicial = Initial concentration Vfinal = Final volume Cfinal = Final concentrationIn this case:
Vinicial= 250 mL= 0.25 L (Being 1 L=1000 mL)Cinicial= 12.5 MVfinal= 1.5 L+ 0.25 L=1.75 LCfinal= ?Replacing:
0.25 L* 12.5 M= 1.75 L* Cfinal
Solving:
[tex]Cfinal=\frac{0.25 L* 12.5 M}{1.75 L}[/tex]
Cfinal= 1.786 M
The molarity of the diluted solution is 1.786 M
Question: DNA is a ___________ found in the nucleus of cells in all living organisms.
Question: The genome, chromosomes and ___________ of an organism are all made of DNA.
Question: DNA is a long set of coiled set of basic ___________ or letters.
Questions: Genes are instructions on how to build______________
Question: Even though organisms are different, they can have ________genes.
Answer:
moleculegenesthey tried to trick u, its only letters, it then converts into sentences or chaptersproteinssimilarhope this helped :DWhat continent have only one climate?
Answer: antarctica
Explanation: it stays cold year round never gets warm
Answer:
Antarctica
Explanation:
Antarctica is covered with ice year round. Therefore, I do believe that it is a frozen desert all year round.
A high jumper reaches a height of 2.45 m. If they generated an estimated 1030 J to reach that height in 0.71 s, how much power did his legs generate in that jump
Answer:
Power = 1471.4W or 1.47kW
Explanation:
Height = 2.45m
Energy = 1030J
Time = 0.70s
Power = energy dissipated / time taken
Power = 1030 / 0.70
Power = 1471.42 watt
Power = 1.47kW
His legs generated a power of 1.47kW in that jump
What is the inverse molar mass of carbon
Final answer:
The inverse molar mass of carbon, based on its average molar mass of 12.011 g/mol, is approximately 0.08326 mol/g. This value is useful for calculating the number of moles in a given mass of carbon.
Explanation:
The inverse molar mass of carbon refers to the number of moles per gram rather than grams per mole. Since the average molar mass of carbon is 12.011 g/mol, the inverse molar mass would be 1 divided by 12.011 g/mol. Conducting this calculation provides the inverse:
1 / 12.011 g/mol ≈ 0.08326 mol/g
This value represents the number of moles of carbon present in one gram of carbon. The fractional abundance of isotopes does not affect this conversion, as it is based on the average molar mass listed on the periodic table.
When performing chemical calculations, the inverse molar mass is useful for finding the amount of substance when you have a given mass. In this case, the inverse molar mass of carbon can be used to quickly determine how many moles of carbon there are in a sample by simply multiplying the mass of the sample by 0.08326 mol/g.
Final answer:
The inverse molar mass of carbon is approximately 0.08326 mol/g, which is calculated by taking the reciprocal of the average molar mass of carbon (12.011 g/mol).
Explanation:
The inverse molar mass of carbon refers to the reciprocal of the molar mass of carbon. Since the average molar mass of carbon is listed as 12.011 g/mol, the inverse molar mass would be 1 divided by 12.011 g/mol. Therefore, the inverse molar mass of carbon is approximately 0.08326 mol/g.
It's important to remember that when calculating the inverse molar mass, we are essentially determining how many moles of carbon are present in one gram. This value can be useful in various chemistry calculations, particularly in stoichiometry where conversion between mass and moles is frequently required.
Which term describes a substance that increases the concentration of hydroxide (OH-) ions in solution? *
Answer:
Arrhenius definition of a base
Explanation:
got it right on edge
2. As the caisson is pushed deeper underwater, the air pressure in the caisson rises to 26.1 psi. Since it is 1869, the caisson is illuminated using flame. At the beginning of the shift, the temperature in the caisson was 91oF. But by the end of the shift, the heat from the lights and body heat have increased the temperature in the caisson to 95oF. What is the new air pressure in the caisson?
Answer:
The new air pressure is 21.76 psi
Explanation:
The caisson is a fixed volume structure hence we have pressure variation with temperature at constant volume which is explained by Gay Lussac's law which states that the pressure of a given mass of gas is directly proportional to its Kelvin temperature provided that the volume remain constant.
Therefore, P₁/T₁ = P₂/T₂
Where:
P₁ = Initial air pressure = 26.1 psi
T₁ = Initial air temperature = 91 °F = 305.93 K
P₂ = New air pressure = Required
T₂ = New air temperature = 95 °F = 308.15 K
Therefore, making P₂ the subject of the formula, we have;
P₂ = (P₁ × T₂)/T₁ = (26.1×308.15)/305.93 = 21.76 psi
The new air pressure = 21.76 psi.
Note the molecular mass of a copper(I) oxide molecule in the image below. What is the mass of 8.250 moles of Cu2O?
Answer : The mass of copper(I) oxide is, 1180.5 grams.
Explanation : Given,
Moles of copper(I) oxide = 8.250 mol
Molar mass of copper(I) oxide = 143.09 g/mol
Formula used:
[tex]\text{ Mass of copper(I) oxide}=\text{ Moles of copper(I) oxide}\times \text{ Molar mass of copper(I) oxide}[/tex]
Now put all the given values in this formula, we get:
[tex]\text{ Mass of copper(I) oxide}=(8.250moles)\times (143.09g/mole)=1180.5g[/tex]
Therefore, the mass of copper(I) oxide is, 1180.5 grams.
How do the small bodies in the solar system differ from one another?
The solar system has small bodies categorized mainly as asteroids and comets. Asteroids are rocky bodies found mostly between Mars and Jupiter, while comets are made of frozen gases and reside within distant, cooler regions. Other bodies include moons and ring systems around giant planets.
Explanation:The solar system consists of various small bodies, each categorized due to their composition and location. Primarily, there are two classes, asteroids and comets.
Asteroids are primarily rocky bodies that orbit the Sun and are mostly found in the space between Mars and Jupiter, although a few cross the orbits of planets like Earth. These are remnants from when the solar system was forming, even predating the planets. Some small moons are actually captured asteroids - the moons of Mars, for instance.
Another class, comets, are primarily made of various frozen gases such as water, carbon dioxide, and carbon monoxide. Like asteroids, comets are remnants from the formation of the solar system. However, they were formed in distant, cooler regions of the solar system and continue to remain in these regions.
Besides these, we also have moons that orbit planets, and ring systems around the giant planets which are made up of countless small bodies, and still-smaller objects with masses less than about 1/100th the mass of the Sun, which are also called planets.
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Which statement describes compounds? Compounds are made of one type of atom. Compounds cannot be represented by models. Compounds are represented by chemical formulas. Compounds cannot be broken down into simpler forms.
I WILL MARK THE BRAINILEST As a roller coaster goes down hill,
Question 4 options:
kinetic energy is converted into potential energy
potential energy is converted into Kinetic energy
electrical energy is converted into potential energy
potential energy is convered into electrical energy
Question 5 (1 point)
You pull into the gas station to fill up your car with gas. During this time the car has what kind of energy?
Question 5 options:
Kinetic energy only
both potential and kinetic energy
potential energy only
Neither
Question 6 (1 point)
The maxium kinetic energy of a box sliding from the top of the ramp to the bottom of the ramp is.
Question 6 options:
at the top
at the bottom
in the middle
stored equality with all locations
Answer:
4: B
5: C
6: B
Explanation:
Q4) Potential Energy is changed into Kinetic Energy
Q5) Potential Energy only
Q6)At the bottom
Hope it helps :)
A chemical equilibrium, the amount of (blank) because( blank)
Answer:
the amount of product and reactant remains constant because the rates of the foward and reverse reactions are equal
Explanation:
Chemical equilibrium is a state where reactant and product concentrations remain constant over time, as the forward reaction rate equals the reverse reaction rate, known as dynamic equilibrium.
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change over time. This state occurs when the rate of the forward reaction is equal to the rate of the reverse reaction, leading to no net changes in the concentrations of the reactant(s) and product(s). This is referred to as a dynamic equilibrium.
The equilibrium constant (Kc) is a value that represents the ratio of products to reactants at this equilibrium state, computed from a balanced chemical equation. The concept of dynamic equilibrium is essential for understanding many chemical processes, as it represents a condition where despite the ongoing forward and backward reactions, the overall concentrations remain constant, illustrating a balanced chemical system.
HELP!!!
While taking his clothes out of the dryer, Charles finds a sock clinging to his sweater.
What is the best explanation for this common phenomenon?
A. In the dryer, both the sock and the sweater lost electrons.
B. In the dryer, both the sock and the sweater gained electrons.
C. In the dryer, either the sock or the sweater gained electrons while the other item lost electrons.
D. The cause of static cling is an unsolved scientific mystery.
Answer:
C. In the dryer, either the sock or the sweater gained electrons while the other item lost electrons.
The best explanation for the phenomenon of a sock clinging to a sweater in the dryer is that in the dryer, either the sock or the sweater gained electrons while the other item lost electrons, option C.
What is static electricity ?Static electricity occurs when two objects with different electrical charges come into contact and then separate. In the dryer, friction between the clothes causes electrons to be transferred from one surface to another, resulting in an imbalance of electrical charges.
The sock and the sweater have different tendencies to gain or lose electrons, which can create a charge imbalance that causes them to be attracted to each other.
This attraction, known as static cling, can be seen in other situations where two objects with different electrical charges come into contact, such as when you rub a balloon on your hair and it sticks to a wall. Where one gets positive charge and the other getting negative charge.
Therefore, option C is correct.
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Which equation represents the combined gas law?
Answer:
Equation 3
Explanation:
It combines all the gas laws and it is called the ideal gas equation
Answer:
C.
Explanation:
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the pressure of
the gas?
It decreases by a factor of four.
It increases by a factor of four.
It decreases by a factor of eight.
It increases by a factor of eight.
Answer:
DECREASE BY A FACTOR OF FOUR
Explanation:
Using pressure equation:
P 1 / T1 = P2 /T2 (at constant volume)
P1 = P
T1 =T
P2 = ?
T2 = 4 T
So therefore;
P2 = P1T1/ T2
P2 = P T/ 4 T
P2 = 1/4 P
The pressure is decreased by a factor of four, the new pressure is a quarter of the formal pressure of the gas.
Answer:
A on edg
Explanation:
When barium hydroxide and ammonium chloride react,the temperature of the mixture decreases.What kind of reaction is this?
Answer:
Endothermic
Explanation:
When barium hydroxide and ammonium chloride react, the temperature decreases because it's an endothermic reaction, where heat is absorbed, causing a cooling effect.
Explanation:When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases because the reaction is endothermic. An endothermic reaction is a type of chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature. This is in contrast to exothermic reactions, which release heat, raising the temperature of the surroundings. In the case of barium hydroxide reacting with ammonium chloride, the cooling effect is so substantial that it can cause water to freeze, showcasing the highly endothermic nature of this reaction.
Endothermic reactions are characterized by their requirement for heat to proceed, thereby cooling the environment. This concept is essential in understanding thermochemistry, which involves the study of energy changes that occur during chemical reactions. The reaction between barium hydroxide and ammonium chloride serves as an example of how chemical reactions can absorb heat energy, leading to a temperature drop in the immediate environment.
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1 point
If 2 moles of CO2 are created how many moles of C2H6 reacted?
2 C2H6
+ 702
4CO2 + 6H2O
3.5 mol C2H6
1 mol C2H6
4 mol C2H6
8 mol C2H6
Answer:
1 mole of C2H6.
Explanation:
The balanced equation for the reaction is given below:
2C2H6 + 7O2 —> 4CO2 + 6H2O
We can determine the number of mole of C2H6 that reacted to produce 2 moles of CO2 as follow:
From the balanced equation above,
2 moles of C2H6 reacted to produce 4 moles of CO2.
Therefore, Xmol of C2H6 will react to produce 2 moles of CO2 i.e
Xmol of CO2 = (2 x 2)/4
Xmol of CO2 = 1 mole.
Therefore, 1 mole of C2H6 is required to produce 2 moles of CO2.
Chemistry Convert the following measurement
Answer:
Explanation:
8.97 x 10⁵ [tex]\frac{m}{s^2}[/tex]
= 8.97 x 10² x 10⁵ [tex]\frac{cm}{s^2}[/tex]
= 8.97 x 10² x 10⁵cm /(10³ms)²
= 8.97 x10 x 10⁶cm / 10⁶ ms²
= .897 x 10² [tex]\frac{cm}{ms^2}[/tex]
89.7 cm/ms^2
Explanation:
1 m/s^2 = 0.0001 cm/ms^2
So, 8.97 x 10^5 m/s^2 = 89.7 cm/ms^2
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A student is titrating 50 mL of 0.32 M NH3 with 0.5 M HCl. How much hydrochloric acid must be added to react completely with the ammonia?
Answer:
The volume of HCl to be added to completely react with the ammonia is 0.032 L or 32mL
Explanation:
Using the formula
Ca Va = Cb Vb
Cb = 0.32 M
Vb = 50 mL = 50/1000 = 0.050L
Ca = 0.5 M
Va =?
Substituting for Va in the equation, we obtain:
Va = Cb Vb / Ca
Va = 0.32 * 0.05 / 0.5
Va = 0.016 / 0.5
Va = 0.032 L
The volume of HCl to be added to completely react with the ammonia is 0.032 L or 32mL
As the magnesium reacts, the hydrogen gas produced is collected by water displacement at 23.0oC. The pressure of the gas in the collection tube is measured to be 749 torr. Given that the equilibrium vapor pressure of water is 21 torr at 23.0oC, calculate the pressure that the H2(g) produced in the reaction would have if it were dry.
Answer: The pressure that the [tex]H_2(g)[/tex] produced in the reaction would have if it were dry will be 728 torr
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{H_2}+p_{H_2O}[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gas = 749 torr
[tex]p_{H_2}[/tex] = partial pressure of hydrogen = ?
[tex]p_{H_2O}[/tex] = partial pressure of water = 21 torr
putting in the values we get:
[tex]749=p_{H_2}+21[/tex]
[tex]p_{H_2}=728torr[/tex]
Thus the pressure that the [tex]H_2(g)[/tex] produced in the reaction would have if it were dry will be 728 torr
To calculate the dry pressure of the hydrogen gas, subtract the equilibrium vapor pressure of H2O at 23.0°C from the total pressure in the tube: 749 torr - 21 torr = 728 torr. Therefore, the pressure of the H2(g) would be 728 torr if it were dry.
Explanation:The pressure of hydrogen gas produced in the reaction is determined by taking the total pressure in the collection tube and subtracting the equilibrium vapor pressure of water at the same temperature. In this case, the total pressure is 749 torr, and the equilibrium vapor pressure of water is 21 torr at 23.0°C.
To calculate the dry pressure of the hydrogen gas, you would perform this calculation: Dry H2(g) pressure = total pressure - vapor pressure of water = 749 torr - 21 torr = 728 torr.
This tells us if the hydrogen gas were dry, its pressure would be 728 torr. This involves concepts related to gas laws, vapor pressure, and reactions producing gas in chemistry.
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How long can carbon dioxide remain in the environment after it is released?
A. 50 to 200 years
B. 12 to 17 years
C. 12 to 17 months
D. 50 to 200 days
Answer:
A. 50 to 200 years
Answer:
A. 50 to 200 years
Explanation:
Hope this helped! stay safe!
how do mass and height of an object affect the gravititational potential energy
A. Mass and height have same effect on gravitational potential energy
B. Height has a greater effect than mass on gravitational potential energy
C. Height has almost 10 times the effect on gravitational potential energy that mass has
D. Mass has a greater effect than height on gravitational potential energy
Mass and height have the same effect on gravitational potential energy.
The way mass and height of an object affect the gravitational potential energy is that: A. Mass and height have same effect on gravitational potential energy.
Energy can be defined as the ability or capacity of an object or body to perform (do) work. Thus, energy is typically measured in Joules (J).
Basically, the two (2) main types of energy are;
Kinetic energy (K.E). Gravitational potential energy (G.P.E).Gravitational potential energy (G.P.E) can be defined as the energy possessed by an object or body due to its position (height) above planet Earth.
Mathematically, gravitational potential energy (G.P.E) is given by the formula;
[tex]G.P.E = mgh[/tex]
Where:
G.P.E is the gravitational potential energy. m is the mass of an object. g is the acceleration due to gravity. h is the height of an object.This ultimately implies that, gravitational potential energy (G.P.E) is highly dependent on both the mass of an object, height of an object, and the acceleration due to gravity.
In conclusion, both mass and height typically have same effect on gravitational potential energy (G.P.E).
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Sulfurous acid, H2SO3, breaks down into water (H20) and sulfur dioxide (SO2).
If only one molecule of sulfurous acid was involved in a chemical reaction, how many sulfur (S) atoms would be in the
products?
Answer:
1 atom of sulfur
Explanation:
Answer:
1 atom and sulfur
Explanation:
la la lalalala
A mixture of gases at a total pressure of 725 mmHg contains nitrogen, carbon dioxide, helium, and oxygen. The partial pressure of carbon dioxide is 175 mmHg, the partial pressure of nitrogen is 355 mmHg, and the partial pressure of helium is 15 mmHg. What is the partial pressure of oxygen?
Answer: The partial pressure of oxygen is 180 mm Hg
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{N_2}+p_{CO_2}+p_{He}+p_{O_2}[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = 725 mm Hg
[tex]p_{N_2}[/tex] = partial pressure of nitrogen = 355 mm Hg
[tex]p_{CO_2}[/tex] = partial pressure of carbon dioxide = 175 mm Hg
[tex]p_{He}[/tex] = partial pressure of helium = 15 mm Hg
[tex]p_{O_2}[/tex] = partial pressure of oxygen = ?
putting in the values we get:
[tex]725=355+175+15+p_{O_2}[/tex]
[tex]p_{O_2}=180mmHg[/tex]
The partial pressure of oxygen is 180 mm Hg