Chem 210 Module 3 WITH 100% RATED CORRECT REAL EXAM
QUESTIONS AND CORRECT ANSWERS| GRADED A+ |2025 LATEST
VERSION | 100% VERIFIED
A piston is applying 1265 mm Hg pressure on a sample of gas at a temperature of
175 °C. If the temperature is reduced to 85.2 °C, what is the new pressure of the
gas? - (answer)1.01 x 10^3 mm Hg
P1/T1=P2/T2 so
P2= P1(T2/T1)
P1= 1265 mmHg
T1=175+273=448K
T2=85.2+273=385.2K
P2=1265(385.2/448)
P2=1011mmHg
Complete the following statement: In Charles's law, the volume of a gas ________
when the ________ decreases. - (answer)decreases; temperature
,Two flasks of equal volume and at the same temperature contain different gases.
One flask contains 5.0 gg of O2O2, and the other flask contains 5.0 gg of H2H2. Is
each of the following statements true or false? Explain.
Both flasks contain the same number of molecules. - (answer)False. Because the
molar mass of O2 is greater than the molar mass of H2, 5.0 g of O2 will contain
fewer molecules than 5.0 g of H2.
Two flasks of equal volume and at the same temperature contain different gases.
One flask contains 5.0 gg of O2O2, and the other flask contains 5.0 gg of H2H2. Is
each of the following statements true or false? Explain.
The pressures in the flasks are the same. - (answer)False. There are different
numbers of moles in the flasks, meaning that the pressures are different.
(Gas pressure is the number of collisions, or force, exerted by gas particles that hit
the walls of a container. Therefore, fewer molecules would result in a lower number
,of collisions. Having the same volume and temperature does not necessarily
indicate equal pressures because the number of moles is different.)
425 K - (answer)temperature
1.0 atm - (answer)pressure
10.0 L - (answer)volume
0.50 moles of He - (answer)amount of gas
Pressure of a gas increases with increasing temperature. - (answer)According to
kinetic molecular theory, at a higher temperature, the number and force of collisions
against the walls of the container is greater.
(increased kinetic energy)
, Gas particles fill a container of any size. - (answer)According to kinetic molecular
theory, the attractive forces between the particles of a gas are very small and cannot
hold the particles together.
(large distances, low attractive forces contribute to gas's ability to be compressed
and completely fill the volume of the container)
Gases have low densities. - (answer)According to kinetic molecular theory, gas
particles are very far apart, meaning that the mass of a gas in a certain volume is
very small.
(volume of a individual gas particle is low when compared to the volume of the
container, identity of gas is not relevant. Since density is the mass of a substance
divided by its volume, the large distance between the small particles results in a low
density.)
Why does a sealed bag of chips expand when you take it to a higher altitude?
At a higher altitude, the ___ will ___ than at lower altitudes. The gas pressure in the
bag will then be ____ than the pressure outside the bag. This causes the bag to
expand. - (answer)atmospheric pressure
QUESTIONS AND CORRECT ANSWERS| GRADED A+ |2025 LATEST
VERSION | 100% VERIFIED
A piston is applying 1265 mm Hg pressure on a sample of gas at a temperature of
175 °C. If the temperature is reduced to 85.2 °C, what is the new pressure of the
gas? - (answer)1.01 x 10^3 mm Hg
P1/T1=P2/T2 so
P2= P1(T2/T1)
P1= 1265 mmHg
T1=175+273=448K
T2=85.2+273=385.2K
P2=1265(385.2/448)
P2=1011mmHg
Complete the following statement: In Charles's law, the volume of a gas ________
when the ________ decreases. - (answer)decreases; temperature
,Two flasks of equal volume and at the same temperature contain different gases.
One flask contains 5.0 gg of O2O2, and the other flask contains 5.0 gg of H2H2. Is
each of the following statements true or false? Explain.
Both flasks contain the same number of molecules. - (answer)False. Because the
molar mass of O2 is greater than the molar mass of H2, 5.0 g of O2 will contain
fewer molecules than 5.0 g of H2.
Two flasks of equal volume and at the same temperature contain different gases.
One flask contains 5.0 gg of O2O2, and the other flask contains 5.0 gg of H2H2. Is
each of the following statements true or false? Explain.
The pressures in the flasks are the same. - (answer)False. There are different
numbers of moles in the flasks, meaning that the pressures are different.
(Gas pressure is the number of collisions, or force, exerted by gas particles that hit
the walls of a container. Therefore, fewer molecules would result in a lower number
,of collisions. Having the same volume and temperature does not necessarily
indicate equal pressures because the number of moles is different.)
425 K - (answer)temperature
1.0 atm - (answer)pressure
10.0 L - (answer)volume
0.50 moles of He - (answer)amount of gas
Pressure of a gas increases with increasing temperature. - (answer)According to
kinetic molecular theory, at a higher temperature, the number and force of collisions
against the walls of the container is greater.
(increased kinetic energy)
, Gas particles fill a container of any size. - (answer)According to kinetic molecular
theory, the attractive forces between the particles of a gas are very small and cannot
hold the particles together.
(large distances, low attractive forces contribute to gas's ability to be compressed
and completely fill the volume of the container)
Gases have low densities. - (answer)According to kinetic molecular theory, gas
particles are very far apart, meaning that the mass of a gas in a certain volume is
very small.
(volume of a individual gas particle is low when compared to the volume of the
container, identity of gas is not relevant. Since density is the mass of a substance
divided by its volume, the large distance between the small particles results in a low
density.)
Why does a sealed bag of chips expand when you take it to a higher altitude?
At a higher altitude, the ___ will ___ than at lower altitudes. The gas pressure in the
bag will then be ____ than the pressure outside the bag. This causes the bag to
expand. - (answer)atmospheric pressure
