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**1. Homework Statement**

A 200g sample of CO2 occupies a volume of 110 L at a pressure of 1 atm.

a) What is the number of moles in the gas

b) What is the temperature?

c) if the volume is increased up to 200 L and the temperature is kept constant. what is the new pressure.

**2. Homework Equations**

**3. The Attempt at a Solution**

a) 110/24.7 = 4.45 ( i think thats right)

b) pV = constant is that constant the temperature???

if so the temperature = 1 x 110 = 110

c) ( p1 v1 ) / T1 = ( p2 V2 ) / T2

(1 x 110) / 110 = ( p2 x 200) / 110

p2 = (1 x 110 x 110) / (110 x 200) = 0.55

i'm not sure if i'm doing this right can anyone help?

THANKS!