CHEM 1001/CHM 1020/ Chm1025C/CHM1032C†††††††† Name:________
Module 5 SamplePretest
Module Six Part E Gas Law Problems††††††††††††††††††††††††††† 20 points
1.† A sample of a gas has a volume of 100 mL when measured at 25 oC and
†760 mmHg.† What volume will the gas occupy at 25 oC and 380 mmHg?
2. The volume of a gas is 100.0 mL at 27 oC.† At what temperature in degrees Celsius would the volume of the gas be 200.0 mL, assuming the pressure remains constant.
Law of Partial Pressures 3. Calculate the
dry volume in milliliters of 200 mL of hydrogen gas
collected over water at 25 oC at
760 torre pressure with the temperature remaining
constant.† (The partial pressure of water
vapor at 25 oC is 23.8 torre.) Gay-Lussacís
Law 4.† A sample of gas occupies 100.0 L at 710.0 torre and 27 oC.† Calculate the pressure in torre
if the temperature is changed to 127 oC
while the volume remains constant.
Ideal Gas Equation-Combined Gas Laws
5. Calculate the number of moles of nitrogen gas in a 5.00 L cylinder at 27 oC and 4 atm pressure. R = 0.0821 L atm/ K mole )!
How much does this volume of gas weigh?