One mole of an unknown sample contains 120 g of carbon and 30.3 g of hydrogen. what is the empirical formula of the compound? show your work.

atomic mass of carbon is C = 12 g/mol

atomic mass of hydrogen is H = 1 g/mol

now number of carbon atoms

Similarly the number of hydrogen atoms are

so Carbon atom and hydrogen atom must be in ratio of 10:30

so the ratio is 1:3

now the empirical formula is always in simplest form

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