A certain compound contains 4.0 g of calcium and 7.1 g of chlorine. Its relative molecular mass is 111. Find its empirical and molecular formulas

Given :

A certain compound contains 4.0 g of calcium and 7.1 g of chlorine.

Its relative molecular mass is 111.

To Find :

Its empirical and molecular formulas.

Solution :

Moles of calcium , .

Moles of chlorine , .

The ratio calcium and chlorine is 1 : 2 .

So , the empirical formula is .

Now , molecular mass of is :

So ,

Therefore , the molecular formula is also .

Hence , this is the required solution .

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