Question

A compound has 93.7 0% carbon and 6.29 % hydrogen if its molecular mass is 128 gram per mole calculate its molecular formula​

Answer 1

Answer:

Ratio of C:H is 7.83:6.29 or 1.2. Nearest whole multiple is 5, resulting in ratio of 6:5. 6-C and 5-H would have a molecular weight of (6×12)+(5×1)=77 The actual molecular weight is 128, so the formula must be 12877=1.67×C6H5 .