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At 25oC and 751 torr, 1.05 g of the gas occupies 0.500 L.
What is the molecular formula for the gas?

Does it matter if this is an ideal gass because I would like to use PV = nRT = ideal gass law

|dw:1364660898982:dw|

using this equation i got moles = 0.020194 moles

@.Sam.

CN or C2N2......?

any ideas?

yes

yes I got that

but what I need is how to get the molecular formula because I only have percent by mass

so I dont know

n= m/M
PV = nRT
PV = m/M R T
From this equation find M ie MOLECULAR MASS