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