Question

25 gram of MCL 4 contains 0.5 mole chlorine then its molecular weight is

Answer 1

25g/0.5mol = 50g/mol 

There are 4 mol of chlorines 

50g/mol* 4mol = 200g

Answer 2

Answer: The molecular weight of $MCl_4$ will be 200 grams.

Explanation:

We are given a compound having chemical formula $MCl_4$

If, 4 moles of chlorine is present in 1 mole of compound.

Then, 0.5 moles of chlorine will be present in = $\frac{1}{4}\times 0.5=0.125mol$ of compound.

To calculate the molar mass of compound, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

We are given:

Moles of compound = 0.125 mol

Given mass of compound = 25 g

Putting values in above equation, we get:

$0.125mol=\frac{25g}{\text{Molar mass of }MCl_4}\\\\\text{Molar mass of }MCl_4=200g$

Hence, the molecular weight of $MCl_4$ will be 200 grams.