I just want to check my answers......Please show your work 1. What is the rms ve

ID: 1021032 • Letter: I

Question

I just want to check my answers......Please show your work

1. What is the rms velocity of H2 at 25oC?

2. 0.0200 mol of argon gas occupies 7.00L. How many moles argon must be added to increase the volume to 10.00L?

0.014

3. 6.0L of a gas having pressure of 1.2 atm will have a volume of ________ when it's pressure is 700mmHg.

5. 350 ml of O2 is collected over water at 1.20 atm and 50oC. Calculate the volume of O2(dry) at STP.

6. 5.0L of a gas at 25.0oC will have a volume of 700ml at:

A. 1930 m/s B. 61.0 m/s C. 482 m/s

1. Answer is B

Vrms^2 = 3RT/M = 3 X 8.314 x 298 ) / 2 = 3716.358 and Vrms = 60.69m/s

2. Answer is A

from V1n2 = V2n1 we have n2 = 10.0 x 0.02 ) / 7 = 0.02857 therefore moles added = 0.02857-0.02 = 0.0086 moles

3. Answer is B

from P1V1 = P2V2 , we have V2 = 912 mmhg x 6.0 ) /700mmhg = 7.817

5. Answer is C

from P1V1/T1 = P2V2/T2 , so 1.2 x 350 ) / 323 = 1.0 x V2 ) / 273 or V2 = 350 ml

6. Answer is A

from V1/T1 = V2/T2 we have T2 = 0.7 x 298) 5 = 41.72