Question

a sample of a compound contains 160 g of oxygen and 20.2 g of hydrogen. what is the compound's empirical formula?

Answer 1

moles oxygen = 160 g O x [1 mol / 16.00 g] = 10.0 mol O

moles hydrogen = 20.2 g H x [1 mol / 1.01 g] = 20.0 mol H

so the mole ratio H : O = 20 : 10 = 2 : 1

so the compounds empirical formula is H2O

Answer 2

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Answer 3

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