gas stoichiometry?

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a sample of nitrogen gas has a volume of 1.75L at STP. how many moles of N2 are present?

please help!!

2007-03-29 12:53:03 · 2 answers · asked by katieklovesga 1 in Science & Mathematics ➔ Chemistry

2 answers

If one mole occupies 22.4 Liters of volume at STP, then divide your gas's volume by 22.4, and that will give you the fraction of a mole that your gas is composed of.

2007-03-29 12:58:56 · answer #1 · answered by squirespeaks 2 · 0⤊ 0⤋

PV = nRT
(1 atm)(1.75L) = n(0.0821 L-atm/mol-deg)(273degK)
n = (1.75)/(0.0821)(273) = 0.08 moles N2

2007-03-29 20:01:30 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋