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How many millimoles are present in 4.9 g of H2SO4? (Molar mass of H2SO4 = 98 g/mol)

1. 50
2. 5
3. 500
4. 0.05

Correct answer: 50

Solution

4.9 g of H2SO4 is 4.9/98 = 0.05 mol = 50 millimoles.

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