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Question

# A compound contains 16% by mass of sulphur. What is the minimum molar mass of the compound?

A
400 g/mol
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B
100 g/mol
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C
200 g/mol
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D
300 g/mol
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Solution

## The correct option is C 200 g/molAt minimum the compound will contain 1 atom of S per molecule. Let's consider that the compound contains 1 atom of S per molecule. We know that, the molar mass of sulphur is 32 g Given: 100 g of the compound contains 16 g of sulphur. Mass of the compound that contains 1 mole of sulphur = molar mass of the compound = 100×3216=200 g/mol

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