Posted by **Mallory** on Monday, November 14, 2011 at 11:50pm.

If a nitrogen gas sample occupies a volume of 2.55 L at 22.0 degrees Celsius and 0.860 atm, what is the mass of the N2 gas?

- Chemistry -
**DrBob222**, Tuesday, November 15, 2011 at 2:16pm
Use PV = nRT and solve for n = number of moles.

Then n = grams/molar mass and solve for grams. You know the molar mass N2 = about 28

- Chemistry -
**25**, Tuesday, March 27, 2012 at 7:06pm
PV=nRT

n=PV/RT

n=0.860*2.55/0.08206*(22.0+273.15)

n=2.19/24.2

n=0.0906 mole

0.0906molN*28.00g N/1 mole N

N=2.54g of N2

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