$4\mathrm{.}50g$ of a certain Compound $x,$ known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of $176.\frac{g}{m}ol,$ is burned completely in excess oxygen, and the mass of the products carefully measured:

$\backslash$table$[[$product$,$mass$],[$carbon dioxide,$6\mathrm{.}75g$