Answer:
C. It lists only the substances that are changed.
Explanation:
Balanced Chemical equation:
HClO₂(aq) + NaOH(aq) → H₂O(l) + NaClO₂ (aq)
Ionic equation:
H⁺(aq) + ClO₂⁻(aq) + Na⁺(aq) + OH⁻(aq) → H₂O(l) + Na⁺(aq) + ClO₂⁻ (aq)
Net ionic equation:
H⁺(aq) + OH⁻(aq) → H₂O(l)
The ClO₂⁻(aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form. This'e why it is written in net ionic equation.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.
Final answer:
A net ionic equation lists only the substances that change during a reaction, excluding spectator ions that do not participate in the chemical process. Therefore, the correct answer is C: It lists only the substances that are changed.
Explanation:
A net ionic equation is a chemical equation that shows only the species that actually participate in the reaction. These species are the ions that undergo a chemical or physical change during the reaction, which is different from the spectator ions that do not participate in the reaction. Spectator ions are present in the solution before and after the chemical reaction and do not undergo any change, so they are not included in the net ionic equation.
Correctly answering the student's question, a net ionic equation provides information about option C: It lists only the substances that are changed. This type of equation demonstrates the actual chemical change between the ionic compounds, excluding all the spectator ions that remain unchanged during the reaction process.
what is the ionic compound formula for sodium Chloride
Answer:
Ionic compound formula for Sodium chloride is NaCl
Explanation:
NaCl ---------> Na^+ + Cl^-
what is the most difficult thing in chemistry to learn?
Answer: In my opinion I think the periodic table is the hardest.
I don't know if this is the right subject but PLS HELP
Which of the following is not an inclined plane?
A) ladder
B) lever
C) slide
D) screw
What do you think would happen if a solid were exposed to extremely cold temperatures, or if a gas were exposed to extremely hot temperatures?
At high temperature the gas would diffuse out as the pressure increases and at extremely low temperature the solid becomes compact.
Explanation:
The states of matter largely depends on the temperature. Any substance when crosses the threshold temperature its phase changes.
When temperature is low the motion of molecules is also low and internal energy also gets low. Solid have tendency of settling in low energy level and have highly compact molecules. At low temperature the solid would compress as molecules would be highly condensed.
Gas in the nature has its molecules quite far apart in matter. According to Kinetic theory of gases the increase in temperature causes rapid collisions of the gas molecule as the kinetic energy of molecules increases. The greater force of collision would cause increase in pressure of the container and increased diffusion rate.
Final answer:
Solids remain solid but with reduced molecular vibration at extremely cold temperatures, and gases at extremely hot temperatures can expand, increase in pressure, or even form a plasma by breaking chemical bonds.
Explanation:
When a solid is exposed to extremely cold temperatures, it will remain solid because solids are the most stable state of matter at low temperatures. However, the kinetic energy of the molecules within the solid decreases further, which means the molecules vibrate less. In some cases, if the solid is cooled to near absolute zero, it is theorized that molecular movement would cease entirely, and the traditional differences between solids, liquids, and gases would no longer be apparent.
Conversely, when a gas is exposed to extremely hot temperatures, its molecules move more rapidly due to increased kinetic energy, impacting each other and the container with greater force. This can cause the gas to expand or increase in pressure. If the temperature is high enough to break chemical bonds within the molecules, the gas may dissociate into its atomic components or ionize, creating a plasma, which is sometimes referred to as the fourth state of matter.
Additionally, at extremely high temperatures, such as above 1000°C and pressures above 5 atm, a substance may enter a state known as a supercritical fluid, where it exhibits properties of both liquids and gases and does not have a distinct phase transition between liquid and gaseous states.
Blance NH3+Na--->NaNH2+H2
Answer:
2 NH3 + 2 Na = 2 NaNH2 + H2
Explanation:
Answer:
2NH3 + 2Na —> 2NaNH2 + H2
Explanation:
NH3 + Na —> NaNH2 + H2
The above can be balance by doing the following:
There are a total of 4 hydrogen atoms on the right and 3 atoms on the left. This can be balance by putting 2 in front of NH3 and 2 in front of NaNH2 as shown below:
2NH3 + Na —> 2NaNH2 + H2
There are 2 atoms of Na on the right and 1 atom on the left. It can be balance by putting 2 in front of Na as shown below
2NH3 + 2Na —> 2NaNH2 + H2
Now we can see that the equation is balanced as we have equal numbers of atoms of the different elements on both sides of the equation.
Single and double replacement
Answer:
Explanation:
A single replacement or single displacement reaction is a reaction in which one substance replaces another.
A + BC → AC + B
The replacement of an ion in solution by a metal higher in the activity series is a special example of this reaction type.
The relative positions of the elements in the activity series provides the driving force for single displacement reactions.
A double replacement reaction is one in which there is an actual exchange of partners between reacting species. This reaction is more common between ionic substances;
AB + CD → AC + BD
Such reactions are usually driven by;
formation of precipitationformation of water and a gaseous productThe location of an object
There are two main ways to describe the location of an object:
Using a reference pointUsing cardinal directionsWhat are these means of location?1. Using a reference point
A reference point is a fixed point in space with respect to which the relative position or distance of an object is compared. For example, if we say that a book is on the table, we are using the table as a reference point.
2. Using cardinal directions
Cardinal directions are the four main compass directions: north, south, east, and west. We can use cardinal directions to describe the location of an object relative to another object or to a fixed point on Earth, such as the North Pole.
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Complete question:
How can we describe the location of an object?
the transfer of heat within a liquid or gas is
Answer: Convection
Explanation: It is a form of heat transfer occuring only on fluids such liquids and gases. In convection when fluids gains heat they become less dense and rises which implies that warmer air rises and cooler air sinks.
2.
Given the following reaction2Na2S2O3 + AgBr
NaBr + Naz[Ag(S203)2]
a. How many moles of Na2S2O3 are needed to react completely with 42.7 g of AgBr?
Answer:
0.454moles
Explanation:
Calculate the molar mass of AgBr
Ag=108
Br=80
Molar mass= 108+80
Molar mass=188g/mol
It's mole to gram question
2moles of Na2S2O3= 188g of AgBr
X moles of Na2S2O3=42.7g of AgBr
Cross multiply
188x=2×42.7
X= 85.4/188
X=0.454moles
how many moles of oh Hg will be produced from 34.0g oh HgO
Final answer:
To find the number of moles of Hg produced from 34.0g of HgO, divide the mass of HgO by its molar mass and use the stoichiometric relationship from the decomposition equation, resulting in 0.157 moles of Hg.
Explanation:
The question is how many moles of Hg (mercury) will be produced from 34.0g of HgO (mercury(II) oxide). To answer this, we need to use the concept of mole-mass stoichiometry. The molar mass of HgO is approximately 216.59 g/mol. First, you calculate the moles of HgO using its molar mass:
Number of moles = mass (g) / molar mass (g/mol).
Then, based on the balanced chemical equation for the decomposition of HgO, which is 2 HgO (s) → 2 Hg (l) + O2 (g), we see that the molar ratio of Hg to HgO is 1:1. Therefore, the moles of Hg produced will be equal to the moles of HgO that decomposed.
Here is the calculation:
In conclusion, 34.0g of HgO will produce 0.157 moles of Hg when decomposed.
hi :) does the number of neutrons affect the mass number or does the mass number affect the number of neutrons?
Answer:
The number of neutrons effects the mass
Explanation:
Which compound has atoms sharing 2 electrons?
CCl4
N2
Br2
CO2
Carbon dioxide (CO₂) is the compound where atoms share two electron pairs each, forming two double covalent bonds between carbon and oxygen atoms.
Explanation:The compound that has atoms sharing 2 electrons in a double covalent bond is carbon dioxide (CO₂). In this molecule, a carbon atom forms two double covalent bonds with two oxygen atoms. This is represented as O=C=O, indicating that each oxygen atom is sharing two electron pairs with the carbon atom. The carbon atom has four electrons in its valence shell and requires four more to become stable. Therefore, each double bond involves the sharing of two electron pairs, which makes a total of four electrons shared with each oxygen atom.
The compound that has atoms sharing 2 electrons is N2, which is nitrogen gas. Nitrogen gas consists of two nitrogen atoms that are bonded together by a triple covalent bond. Each nitrogen atom shares three electrons with the other nitrogen atom, resulting in a total of 6 shared electrons.
when 4.00 grams of aluminum chloride reacts with excess fluorine, how many liters of chlorine gas are produced?
Answer:
1.008 L
Explanation:
To solve this question you need to know the equation for the reaction. The equation for the reaction will be:
2 AlCl3 + 3 F2 → 2 AlF3 + 3 Cl2
We have excess fluorine so aluminum chloride will be the limiting reagent of the reaction. The coefficient of aluminum chloride is 2 while the coefficient of chlorine gas is 3. If the molecular mass of the aluminum chloride is 133.34 g/mol then the number of chlorine gas made in moles will be:
4g/ (133.34 g/mol) * (3/2)= 0.045 moles
Assuming the reaction happens in STP, the volume will be: 0.045 moles * 22.4 L/mol= 1.008 L
1.008 liters of chlorine gas are produced from the reaction of 4.00 grams of aluminum chloride with fluorine.
To determine how many liters of chlorine gas are produced when 4.00 grams of aluminum chloride reacts with excess fluorine, we start with the balanced chemical equation for the reaction:
2 AlCl₃ (s) + 3 F₂ (g) → 2 AlF₃ (s) + 3 Cl₂ (g)
Step 1: Calculate the moles of aluminum chloride (AlCl₃).
Molar mass of AlCl₃ = 26.98 (Al) + 3 * 35.45 (Cl) = 133.33 g/molMoles of AlCl₃ = 4.00 g / 133.33 g/mol = 0.03 molesStep 2: Use stoichiometry to figure out the moles of chlorine gas (Cl₂) produced.
From the balanced equation, 2 moles of AlCl₃ produce 3 moles of Cl₂.Therefore, 0.03 moles of AlCl₃ will produce (3/2) * 0.03 = 0.045 moles of Cl₂.Step 3: Convert moles of Cl₂ to liters using the ideal gas law under standard conditions (1 mole gas = 22.4 L at STP).
Volume of Cl₂ = 0.045 moles * 22.4 L/mole = 1.008 LThus, 4.00 grams of aluminum chloride reacting with excess fluorine produces approximately 1.008 liters of chlorine gas.
5. The volume of a sample of helium is 4.50 L at 20.0°C and 203.0 kPa. What will its volume be
at 10.0"C and 203.0 kPa?
The volume will be 2.25 L.
Explanation:
As per Charle's law, the volume of a gaseous system is directly proportional to the temperature provided the system is at constant pressure. Since volume of gas is directly proportional to the temperature of the gas molecules, V∝ T
So, in case there is a change in temperature with constant pressure, then there will be equal change in volume.
[tex]\frac{V_{1}}{V_{2} } = \frac{T_{1}}{T_{2} }[/tex]
Thus, here [tex]V_{1}[/tex] = 4.50 L , [tex]T_{1}[/tex]= 20 °C and [tex]P_{1}[/tex] = [tex]P_{2}[/tex] = 203 k Pa , [tex]T_{2}[/tex] = 10°C.
Since, volume and temperature is directly proportional then there will be increase in volume with increase in temperature and vice versa.
[tex]\frac{4.50}{V_{2} } = \frac{20}{10}[/tex]
[tex]V_{2} = \frac{4.50*10}{20} = 2.25 L[/tex]
So, the new volume is 2.25 L.
. A party-supply store sells a helium-gas cylinder with a volume a 0.0155 cubic meters. If the cylinder provides 1.81 cubic meters of helium for balloon inflation (at STP), what must be the pressure inside the cylinder
The pressure inside the cylinder is 8.6 × 10⁻³ atm
Explanation:
At STP, the pressure is 1 atm. As per the Boyle's law, if the temperature of a gas is kept constant then its volume and pressure are inversely proportional to each other. So P₁V₁= P₂V₂
Now we have to find the P₂ as[tex]$\frac{P1V1}{V2}[/tex]
Inserting the given values, in the above expression, P1 = 1 atm, V1 = 0.0155 m³, V2 = 1.81 atm, P2 = ?, we will get P2 as,
P₂ = [tex]$\frac{0.0155\times1}{1.81}[/tex] = 8.6 × 10⁻³ atm
So the pressure inside the cylinder is 8.6 × 10⁻³ atm
Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O
Answer:
3. 049g
Explanation:
Molar mass of Ca = 40
Molar mass of Cl = 35.5
H = 1, O =16
Molar mass of CaCl2.9H20 = [40 + (35.5*2) + (9*18)]
CaCl2.9H20 = 273g/mol
Molar mass of CaCl2 = 40 + (35.5*2) = 111g/mol
111g of CaCl2 is present in 273g of CaCl2.9H20
Xg of CaCl2 is present in 7.5g of CaCl2.9H20
X = (7.5*111) / 273
X = 3.049g
Final answer:
To find the quantity of pure CaCl₂ in 7.5 g of CaCl₂•9H₂O, you need to calculate the molar masses of both the hydrated and anhydrous forms, find the number of moles in 7.5 g, and then convert this to grams of pure CaCl₂.
Explanation:
To determine the quantity of pure CaCl₂ in 7.5 g of CaCl₂•9H₂O, we first need to calculate the molar mass of the hydrated compound and then the molar mass of anhydrous CaCl₂. After that, using stoichiometry, we find out how many moles of the hydrated compound we have in 7.5 g and convert this to the mass of anhydrous CaCl₂.
Calculate the molar mass of CaCl₂•9H₂O: (40.08 for Ca) + (2 x 35.45 for Cl) + (9 x 18.015 for H₂O) = 110.98 (for CaCl₂) + 162.135 (for 9H₂O) = 273.115 g/mol.Calculate the molar mass of CaCl₂: 40.08 (for Ca) + (2 x 35.45 for Cl) = 110.98 g/mol.Determine moles of CaCl₂•9H₂O in 7.5 g: 7.5 g ÷ 273.115 g/mol = 0.02745 mol.Convert moles of hydrated compound to grams of anhydrous CaCl₂: 0.02745 mol x 110.98 g/mol = 3.05 g of CaCl₂.The quantity of pure CaCl₂ in 7.5 g of CaCl₂•9H₂O is therefore approximately 3.05 g.
2. If I have 45 g of Carbon, to find the number of moles of carbon I would *
divide by molar mass (12.01 g)
multiply by molar mass (12.01 g)
divide by Avogadro's number (6.02 x 10^23)
multiply by Avogadro's number (6.02 x 10^23)
Sushmit
Answer:
divide by molar mass (12.01 g)
Explanation:
To find the number of moles of the carbon, divide by molar mass (12.01 g).
The number of moles of a substance is given as;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
To solve this problem;
since mass of carbon = 45g
Number of moles = [tex]\frac{45}{12.01}[/tex] = 3.75moles
Answer:
3.35 moles.
Explanation:
8. If the velocity of an object changes from 15 m/s to 50 m/s during a time interval
of 4 s, what is the acceleration of the object?
9. If the acceleration in question 8 is constant, what's the average velocity of the
object described?
Acceleration of the object is 8.75 m/s² and average velocity is 32.5 m/s
Explanation:
Given initial velocity = 15 m/s and final velocity = 50 m/s and time = 4sAcceleration of the object = Change in velocity/Time
= 50 - 15/4 = 35/4 = 8.75 m/s²
Average velocity = initial velocity + final velocity/2= 15 + 50/2 = 65/2 = 32.5 m/s
The acceleration of the object is 8.75 m/s², and assuming constant acceleration, the average velocity is 32.5 m/s.
Explanation:To calculate the acceleration of an object when the velocity changes from 15 m/s to 50 m/s over a time interval of 4 s, we can use the formula for acceleration (a), where acceleration equals the change in velocity (Δv) divided by the change in time (Δt):
a = Δv / Δt
The change in velocity is the final velocity minus the initial velocity. Thus, Δv = 50 m/s - 15 m/s = 35 m/s. The time interval is Δt = 4 s.
a = 35 m/s / 4 s = 8.75 m/s²
The average velocity during this interval can be calculated by taking the sum of the initial and final velocities and dividing by two, assuming the acceleration is constant. Therefore, the average velocity (vavg) is:
vavg = (initial velocity + final velocity) / 2
vavg = (15 m/s + 50 m/s) / 2 = 32.5 m/s
What would allow water to pass through granite?
Answer:
sandstone
Explanation:
allows water to pass
A singer sings a note into a microphone. Which of the parts of the wave would be affected by the microphone and how?
A) D, the frequency would get higher.
B) C, the wavelength would get longer.
C) C and D, the amplitude and wavelength would increase.
D) A, B and D. The amplitude and crest would be higher, while the trough would be lower.
For the chemical reaction
Na2CO3+Ca(NO3)2⟶CaCO3+2NaNO3
what mass of calcium carbonate is produced from 4.71
mol of sodium carbonate?
Answer: m = 471 g CaCO3
Explanation: From the balanced equation, convert the moles of Na2CO3 to moles of CaCO3 using the mole ratio from the equation. Then convert miles of CaCO3 to mass using the molar mass of CaCO3.
Solution attached.
Rounding to an appropriate number of significant figures, the mass of calcium carbonate produced from 4.71 moles of sodium carbonate is approximately 471.2 grams.
To find the mass of calcium carbonate (CaCO₃) produced from 4.71 moles of sodium carbonate (Na₂CO₃), we need to use stoichiometry and the balanced chemical equation provided.
From the balanced chemical equation:
1 mole of Na₂CO₃ produces 1 mole of CaCO₃.
Therefore, to find the moles of CaCO₃ produced, we simply use the stoichiometric ratio:
Moles of CaCO₃ = 4.71 moles of Na₂CO₃
Now, we need to find the molar mass of CaCO₃ to convert moles to grams. The molar mass of CaCO₃ is:
Molar mass of CaCO₃ = (1 × atomic mass of Ca) + (1 × atomic mass of C) + (3 × atomic mass of O)
Molar mass of CaCO₃= (1 × 40.08 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol)
Molar mass of CaCO₃ = 40.08 g/mol + 12.01 g/mol + 48.00 g/mol
Molar mass of CaCO₃ = 100.09 g/mol
Now, we can calculate the mass of CaCO₃ produced:
Mass of CaCO₃ = Moles of CaCO₃ × Molar mass of CaCO₃
Mass of CaCO₃ = 4.71 moles × 100.09 g/mol
Mass of CaCO₃= 471.2439 g
Rounding to an appropriate number of significant figures, the mass of calcium carbonate produced from 4.71 moles of sodium carbonate is approximately 471.2 grams.
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Iron is found in Earth's crust as several iron compounds. Calculate the mass in kilograms of the amount of each of the following iron compounds that contains 1.0×10^3kg of iron.
Part C) FeCO3 (siderite)
Express your answer using two significant figures.
The mass of siderite (FeCO3) that contains 1.0×10^3kg of iron can be calculated using the proportion of iron in siderite. The calculation shows that approximately 2.11×10^3kg of siderite contains 1.0×10^3kg of iron, to two significant figures.
Explanation:To calculate the mass of the siderite (FeCO3) compound containing 1.0×10^3kg of iron (Fe), we first need to determine the molar mass of siderite. The molar mass of Fe is 55.845 g/mol, carbon (C) is 12.01 g/mol, and oxygen (O) is 16.00 g/mol. Since there are three oxygen atoms in siderite, the total molar mass of siderite is 55.845 g/mol (Fe) + 12.01 g/mol (C) + 3(16.00 g/mol) (O) = 115.855 g/mol.
Next, use the proportion of iron in siderite to calculate the mass of siderite that would contain 1.0×10^3kg of iron. Given that the proportion of iron in siderite is the molar mass of Fe divided by the molar mass of siderite (55.845/115.855), we can set up a proportion: (1.0×10^3kg Fe / x kg siderite) = (55.845 g / 115.855 g). Solving for x gives us the mass of siderite containing 1.0×10^3kg of iron, approximately 2.11×10^3kg to two significant figures.
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To calculate the mass of FeCO3 (siderite) that contains 1.0×10^3kg of iron, we need to determine the molar mass of FeCO3 and then use stoichiometry to convert the mass of iron to the mass of FeCO3. The mass of FeCO3 is approximately 2.06×10^3 kg.
Explanation:To calculate the mass of FeCO3 (siderite) that contains 1.0×10^3kg of iron, we need to determine the molar mass of FeCO3.
The molar mass of FeCO3 can be calculated by adding up the atomic masses of its constituent elements: Fe (55.8 g/mol), C (12.0 g/mol), and O (16.0 g/mol).
Therefore, the molar mass of FeCO3 is 55.8 + 12.0 + (3 * 16.0) = 115.8 g/mol.
To convert the mass of iron (1.0×10^3 kg) to the mass of FeCO3, we can use the formula:
Mass of FeCO3 = (1.0×10^3 kg of iron) * (115.8 g/mol FeCO3) / (55.8 g/mol Fe)
Calculating this expression gives us:
Mass of FeCO3 = 2.06×10^3 kg
Therefore, the mass of FeCO3 that contains 1.0×10^3 kg of iron is approximately 2.06×10^3 kg.
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Which particles may be gained lost or shared by an atom when it forms a chemical bond?
A-protons
B-electron
C-neutrons
Answer:
B electrons because Valence electrons of the elements in the bond are shared. The gain , loss , or sharing of electrons occurs in every chemical bond.
Question 4 (1 point)
In an endothermic reaction products are
than reactants.
in potential energy and _____ stable
Answer:
The products of an endothermic reaction are less chemically stable.
Explanation:
They required an input of energy to create so naturally they are at a higher energy state.
In an endothermic reaction, the products have higher potential energy and are less stable than the reactants.
Explanation:In an endothermic reaction, the products have higher potential energy and are less stable than the reactants. An endothermic reaction is a chemical reaction that absorbs heat from the surroundings. This means that the products of the reaction have a higher potential energy than the reactants. In other words, the reactants are in a more stable state than the products.
To understand this concept, consider a simple example: the dissociation of water into hydrogen and oxygen gases. This reaction is endothermic because it requires the input of energy to break the bonds between the hydrogen and oxygen atoms in water molecules.
As a result, the products of the reaction, hydrogen and oxygen gases, have a higher potential energy than the reactants, water molecules.
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A compound is composed of 85.6% Carbon and the rest is Hydrogen. The molecular mass of the compound is 42.078g/mol. What is the molecular formula for the compound?
The molecular formula for the compound is [tex]C_{3} H_{6}[/tex]
Explanation:
As with all of these problems, we assume 100 g of an unknown compound.
And thus, we determine the elemental composition by the given percentages.
Moles of carbon = 85.64 / 12.011
= 7.13 mol.
Moles of hydrogen = 14.36 / 1.00794
= 14.25 mol.
There are 2 moles of hydrogen per mole of carbon. And thus the empirical formula is CH[tex]_{2}[/tex].
And molecular formula = n × (empirical formula)
Thus, 42.08 = n × (12.011 + 2 × 1.00794)
And thus n = 3, and molecular formula = [tex]C_{3} H_{6}[/tex]
Calculate the molarity of a solution containing 25.0 moles of ethanol (C₂H₅OH) in enough water to make 3.5 liters of solution?
Answer: 7.14mol/dm3
Explanation:
Molarity is calculated by dividing the amount of a substance in volume of the solution.
i.e Molarity = (Amount in moles/volume in liters or dm3)
Given that:
Amount of moles = 25.0 moles
Volume = 3.5 liters of solution
Recall that 1 liter = 1dm3
so, 3.5 liters = 3.5dm3
Molarity = (25.0moles/3.5dm3)
= 7.14mol/dm3
Thus, the molarity of the solution is 7.14mol/dm3
What is the density of 96 ml of a liquid that has a mass of 90.5 g?
Answer:
Density = Mass / Volume. so, x = 90.5 g / 96 mL ... The Density would be 0.942 g/mL
The density of 96 ml of a liquid that has a mass of 90.5 g is 0.942 g/mL.
What do you mean by density ?The density of a material is the measure of how tightly it is packed together. It is expressed as mass per unit volume. Density Formula: = m/V, where is the density, m is the object's mass, and V is its volume.
A dense object is heavier than a less dense object of the same size. An object with a density less than that of water will float on it, while one with a higher density will sink. The density equation is D = M / V, which stands for density equals mass per unit volume.
Given:
Density = ?
Volume = 96 ml
Mass = 90.5 g
Density = Mass / Volume
Therefore,
x = 90.5 g / 96 mL
= 0.942 g/mL
Thus, The Density would be 0.942 g/mL
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A sample of gas initially has a volume of 1.42 L at 293 K and 1.30 atm. What volume will the sample have if the pressure changes to 1.50 atm while the temperature is increased to 322 K?
1.35 litres is the volume will the sample have if the pressure changes to 1.50 atm while the temperature is increased to 322 K.
Explanation:
Data given:
initial volume in the sample pf gas V1 = 1.42 L
initial temperature of the sample of gas T1 = 293 K
Initial pressure of the gas P1 = 1.30 atm
final pressure of the sample of gas P2= 1.50 atm
final temperature of the sample of gas T2 = 322 K
Final volume V2 = ?
following formula is used:
[tex]\frac{P1V1}{T1}[/tex] = [tex]\frac{P2V2}{T2}[/tex]
V2 = [tex]\frac{P1V1T2}{P2T1}[/tex]
putting the values in the equation:
V2 = [tex]\frac{322 X 1.42 X 1.30}{1.50 X 293}[/tex]
= 1.35 Litre is the volume
When pressure and temperature of the gas is changed the volume becomes 1.35 litres.
The mass of 1 mole of nitrogen is 14 grams. The mass of 1 nitrogen atom will be approximately how much in grams?
Answer:
1.16x10^-23
Explanation:
1 mole of nitrogen has 6.02x10^23 number of nitrogen molecules. each molecule has 2 nitrogen atoms
Solar panels are used to harness sunlight energy. How could solar panels be used in a house?
A to collect and heat rain water
B to prevent heat from escaping the house
C to absorb heat from the roof tiles to heat water
D to absorb energy from the sun’s radiation to heat wat
Answer:
D to absorbe energy from the sun's radiation to heat wats
Final answer:
Solar panels can utilize photovoltaics to generate electricity directly, or solar thermal technology to heat water in a house, with option D being the correct usage in the context of heating water.
Explanation:
Solar panels in a house can be used in various ways to harness solar energy. One of the methods is through photovoltaics, which convert sunlight directly into electricity that can be used to power a home's appliances and lighting. Another method is solar thermal technology, which can absorb the Sun’s energy to heat water or air for domestic use. For the question at hand, the correct answer is option D: to absorb energy from the sun’s radiation to heat water. Solar panels absorb electromagnetic waves, particularly visible light and infrared radiation, which is then converted into thermal energy. This thermal energy can be used to heat water in a residential setting, contributing to the home's hot water supply or heating system, and reducing reliance on conventional energy sources.