# Combustion of carbon compound

Chemistry Level 2

Chemical substance X is a compound of carbon and hydrogen. At a certain constant temperature and pressure, $$1$$ L of substance X was completely combusted, producing $$3$$ L of carbon dioxide ($$\text{CO}_2$$) and $$4$$ L of vapor ($$\text{H}_2\text{O}$$). Which of the following statements is correct about this reaction?

a) The molecular formula of X is $$C_3H_8$$.

b) The volume of gas mixture is increased after the reaction.

c) The mass of oxygen required for a complete combustion of $$4.4$$ g of X is $$16$$ g.

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