Question

.
A vessel contains methane and oxygen in the
mass ratio 1: 1. The fraction of the partial
pressure of hydrocarbon in the total pressure
is
1) 1/3
2) 2/3
3) 1/4
4) 1/2
​

Answer 1

Fins the pressure begin by finding the Mr of methane and oxygen

Mr is the relative molecular mass

Mr of methane

formula is CH_{4}CH

4

Mr=12*1+1*4

=12+4

=16

Mr of oxygen

Mr=16*2

=32

so the ratio of methane and oxygen

=1:2

According to law of partial pressure of hydrocarbon=mole fraction*total pressure

=2/p

=1/3

so option 1 is correct

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