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Question

How many grams of sulphuric acid will be present in 0.25 mol of sulphuric acid?
( atomic mass of S = 32 u and O = 16 u respectively)

A
0.245
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B
2.45
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C
24.5
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D
49.0
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Solution

The correct option is C 24.5
Using mole-mass interconversion,
Number of moles = massmolar mass
Molar mass of sulphuric acid=2+32+(4×16)=98 g/mol
Mass= number of moles×molar mass
=0.25×98=24.5 g

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