Question

At 373° C, the density of a certain oxide of a gas at 5 bar pressure is that of water vapour at 10 bar. What is the molecular mass of the oxide? ​

Answer 1

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Class 11

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>>States of Matter

>>Ideal Gas Equation

>>At 0^o C, the density of a certain oxide

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At 0

o

C, the density of a certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?

Medium

Solution

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We know that :

d=

RT

MP

At same density and same temperature,

M

1

P

1

=M

2

P

2

(Risconstant)−(1)

where,

p

1

=2 bar

M

2

=N

2

=28

putting these value in equation (1)

M

1

×2=28×5

M

1

=70

Thus mass of the oxide is 70 g/mol.