9.00g of certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen , and to have a molecular molar mass of 160g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured : Carbon Dioxide 14.85g and Water 4.05g​

Its the second one nonmetals are moldable and easily shaped 

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

C, small, hard spheres with insignificant volumes

Ithink it's the third answer