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12 November, 04:24

What is the percent composition of sulfur in H 2 SO 4? A. 2.1% B. 65.2% C. 32.7% D. 98.1%

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  1. 12 November, 07:36
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    Percent = mass of the elementx100molar mass of compound Find the mass percents for the elements present in H2SO4. molar mass of H2SO4 = 2 (1) + 32 + 4 (16) = 98 gmass of H = 2 mol H x 1.008g/mol = 2.016 gmass of S = 1 mol S x 32.00g / mol = 32.00 gmass of O = 4 mol O x 16.00g/mol = 64.00 gmass % H = 2.016g/98g x 100 = 2.06%mass % S = 32.00g/98g x 100 = 32.6%mass % O = 64.00g/98g x 100 = 65.3% Calculate the mass % of the elements present in glucose, C6H12O6.
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