题目内容
白磷的化学式是P4,磷的相对原子质量是31,则白磷的摩尔质量是
A.31g/mol | B.62g/mol | C.93g/mol | D.124g/mol |
D
摩尔质量在数值上等于构成这种物质的相对原子量的和,白磷的摩尔质量=4×31=124 g/mol
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题目内容
A.31g/mol | B.62g/mol | C.93g/mol | D.124g/mol |