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Find the molarity of a sulphuric acid solution that is 98% H2SO4 by weight and has density 1.8 g/mL.

1. 6 M
2. 18 M
3. 10 M
4. 4 M

Correct answer: 18 M

Solution

M = 10 * 98 * 1.8 / 98 = 18 M.

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