Question

EQUAL MASSES OF METHANE AND OXYGEN ARE MIXED IN AN EMPTY CONTAINER 25°C . THE FRACTION OF TOTAL PRESSURE TO EXERTED BY OXYGEN IS

a) 1/3

b) 1/2

c) 2/3

d) 1/3(273/298)
Please help ..do not answer unneccessarily please...

Answer 1

Answer:

a)1/3

Explanation:

Equal masses of methane and oxygen are mixed in an empty container at 25degree C. The fraction of the total pressure exerted by oxygen is

3

1

.

Let 32 g of oxygen are mixed with 32 g of methane.

The molar masses of methane and oxygen are 16 g/mol and 32 g/mole respectively

The number of moles of methane =

16g

32g

=2moles.

The number of moles of oxygen =

32g

32g

=1mole.

Total number of moles =2+1=3.

The mole fraction of oxygen =

1+2

1

=

3

1

.

The mole fraction is proportional to the fraction of the total pressure exerted.

Hence, the fraction of the total pressure exerted by ooxygen is 1/3

Answer 2

Answer:

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