2. A compound contains 21 atoms of carbon (and other atoms). The mass percentage of carbon inthe com
問題詳情
2. A compound contains 21 atoms of carbon (and other atoms). The mass percentage of carbon inthe compound is 69.98%. Its molar mass (g/mol) is: (A) 287.6 (B) 360.4 (C) 176.5 (D) 252.2