Question

a sulphur containing organic compound contain 40% sulphur. The minimum molecular mass of the organic compound
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Answer 1

Answer:

We know that % of element in a compound=mass of element/mass of compound ×100.

Therefore 40%=wt of sulphur/mass of compound

40=32/x(x=unknown)×100

X=80this is the answer

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Answer 2

Answer:

The minimum molecular mass of the organic compound is equal to 80gmol⁻¹.

Explanation:

Consider minimum molecular mass of the organic compound is x.

We know the atomic mass of sulphur $=32g$

Given: the mass of organic compound has 40% sulphur.

Therefore,

    40% of x = 32g

⇒   $\frac{40}{100} *x=32$

⇒   $x=\frac{32*100}{40}$

⇒   $x=\frac{3200}{40}$

∴    $x=80gmol^{-1}$

Therefore the $molecular$ $mass$ of the compound is $80gmol^{-1}$.