Question

a compound contains 8% sulphur. what is th minnimum molecular weight ?

Answer 1

Hi

The compound has sulphur=8%
∴ 8g of S is present in 100g
∴ 32g of S is present in 100/8 ×32 = 400g
[Least molecular mass means that at least one atom of sulphur should be present in molecule]

Molecular minimum weight is 400g

Answer 2

Answer: The minimum molecular mass of the compound is 400 grams.

Explanation:

We are given:

A compound having 8 % of sulfur.

This means that 8 grams of sulfur will be present in 100 gram of compound.

We know that:

Mass of 1 sulfur atom = 32 gram

To calculate the minimum molecular weight of compound, there must be 1 sulfur present. So,

If 8 grams of sulfur is present in 100 gram of compound.

Then, 32 gram of sulfur will be present in = $\frac{100g}{8g}\times 32g=400g$ of compound.

Hence, the minimum molecular mass of the compound is 400 grams.