Chemistry questions... Please check... Thank you!

1. The average speeds of gas molecules in cylinders A, B, C, and D are 0.001 m/s, 0.05 m/s, 0.1 m/s, and 0.0005 m/s, respectively. Which cylinder contains gas that is closest to absolute zero?
Answer is D

2. How many moles of a gas sample are in a 10.0 L container at 373 K and 203 kPa?
0.66 moles answer

3. A 3.0 L container holds a sample of hydrogen gas at 150 kPa. If the pressure increases to 2 atm and the temperature remains constant, what will the volume be?
2.25 L

Question

Chemistry questions... Please check... Thank you! 

1. The average speeds of gas molecules in cylinders A, B, C, and D are 0.001 m/s, 0.05 m/s, 0.1 m/s, and 0.0005 m/s, respectively. Which cylinder contains gas that is closest to absolute zero?
Answer is D

2. How many moles of a gas sample are in a 10.0 L container at 373 K and 203 kPa?
0.66 moles answer

3. A 3.0 L container holds a sample of hydrogen gas at 150 kPa. If the pressure increases to 2 atm and the temperature remains constant, what will the volume be?
2.25 L

anonymous · Answer

1st answer is correct.
2nd answer should be 0.652
3rd answer is 2.22 L       Some slight changes

naturesweetie · Answer

Thank you! 
Oh, got it, I must have messed up the numbers... Going to see what I did wrong... Thank you! I believe I got it...