(i) Styrene, the building block of polystyrene, is a hydrocarbon, a compound consisting only

of C and H. If you burn 0.438 g of the compound, and find that it produces 1.481 g of

CO2 and 0.303 g of H2O, determine the empirical formula of the compound.

Answer: CH

(ii) Mesitylene is a liquid hydrocarbon, a compound consisting only of C and H. If you burn

0.115 g of the compound, and find that it produces 0.379 g of CO2 and 0.1035 g of H2O,

determine the empirical formula of the compound.

Answer: C3H4

(iii) Phenanthrene is a hydrocarbon, a compound consisting only of C and H. If you burn

0.215 g of the compound, and find that it produces 0.747 g of CO2 and 0.109 g of H2O,

determine the empirical formula of the compound.

Answer: C7H5

(iv) Quinone, which is used in the dye industry and in photography, is an organic compound

containing only C, H, and O. What is the empirical formula of the compound if you find

that 0.105 g of the compound give 0.257 g of CO2 and 0.0350 g of H2O when burned

completely?

Answer: C3H2O

(v) Vinyl acetate, a compound containing only C, H, and O, is the basis of certain plastics. To

determine its empirical formula you burn 0.178 g and find it produces 0.364 g of CO2 and

0.112 g of H2O. What is the empirical formula of vinyl acetate?

Answer: C2H3O

(vi) Silicon and hydrogen form a series of interesting compounds, SixHy. To find the formula

of one of them, you take a 6.22 g sample of the compound and burn it in oxygen. On

doing so, all of the Si is converted to 11.64 g of SiO2 and all of the H to 6.980 g of H2O.

What is the empirical formula of the silicon compound?

Answer: SiH4

If anyone could help me at all, I would really appreciate it.