Question #90bc3

1 Answer
Jun 9, 2017

Given

Volume of nitrogen V=82.1mL=0.0821L

Pressure of the gas collected excluding aqueous tension

P=(774.514.5)mm=760760=1atm

Temperature of the gas T=(27+273)=300K

Universal gas constant R=0.0821LatmK1mol1

Let mass of the gas be w g

Molar mass of the gas M=2×14=28g/mol

So applying Ideal gas equation

PV=wMRT

w=PVMRT

w=1×0.0821×280.0821×300=28300g

So percentage of nitrogen in the compound

=283000.14×100=66.7%