Skeleton equation to word equation

C4H10 (g) ^ + O2 (g) - > CO2 (g) ^ + H20 (g)

^ = covalent compound

C4H10 is a saturated hydrocarbon or alkane with the general formula CnH (2n+2). Since n = 4 for C4H10, the prefix is but-, and this compound is butane. The rest of the substances are common compounds: oxygen, carbon dioxide and water, so the word equation is:

butane combusted with oxygen gives carbon dioxide and water vapor