# Question #95169

##### 1 Answer

Jul 25, 2016

**The relative molecular mass of gas Z is 32**

*To get feasible result the volume of hydrogen gas diffused is considered*

#### Explanation:

*To solve this problem we are to apply Graham's law of diffusion which states that the rate of effusion or of diffusion (R)of a gas is inversely proportional to the square root of its molecular weight or relatve molecular mass (M) at constant temperature and pressure.*

#color(red)("Symbolically, "R prop 1/sqrtM)#

Let

Now by Graham's law

**The relative molecular mass of gas Z is 32**