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Question

Many homes in rural America are heated by propane gas, a compound that contains only carbon and hydrogen. complete combustion of a sample of propane produces 2.641g of carbon dioxide and 1.442g of water as the only products. find the empirical formula of propane.

can you show your work plz. i tried to do this but i get the wrong aswear. the answear should be C3H8. i think im doing this wrong. thx.

Answer 1

Moles CO2 = moles C = 2.641 g / 44.0098 g/mol =0.06001

Moles water = 1.442 g / 18.0154 g/mol =0.08004

Moles H = 2 x 0.08004 =0.1601

C ( 0.06001) H ( 0.1601)

we divide by the smallest number

C H 2.66

to get whole numbers we multiply by 3

C3H8 is the formula