a hydrocarbon is burnt completely in excess oxygen. it is found that 1.00g of the hydrocarbon gives 2.93g carbon dioxide and 1.80g water. find the empirical formula of the hydrocarbon (H=1,C=12,O=16)

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  1. break up the carbon dioxide to C and O
    break up the water into H and O

    now total them up, change to moles
    H=.2g=.2/1= .2 moles
    Notice that the sum of H and C=1.0g, so all O was atmospheric
    now divide by the least of the above (.066)
    empirical: CH3

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