1.符合C_n(H_2O)_m通式的一定都是糖类吗?答:糖类的一般通式为C_n(H_2O)_m因为分子中氢与氧的原子个数比为2:1,看起来好像是由碳和水构成的,所以人们又称糖类为碳水化合物.但符合该通式的物质也不一定都是糖类,如甲醛CH_2O、乙酸C_2H_4O_2等虽符合该通式,但都不属于糖类.有些物质的分子在组成上虽不符合该通式,但它仍属于糖类,如鼠李 1. C_n (H_2O) _m general formula must be sugar? A: The general formula for the carbohydrate C_n (H_2O) _m because the number of atoms in the hydrogen and oxygen atoms is 2: 1, it seems It seems to be composed of carbon and water, so people also refer to carbohydrates as carbohydrate, but in line with the formula are not necessarily all carbohydrates, such as formaldehyde CH_2O, acetic acid C_2H_4O_2, although in line with the general formula, but neither Belong to carbohydrates.Although some substances in the composition of molecules does not meet the general formula, but it still belongs to carbohydrates, such as buckthorn