将a molNa和a molAl一同投入m g足量水中,所得溶液密度为d g·cm-3,该溶液的质量分数为
A.82a/(46a+m)% | B.82000a/(46a+2m)% |
C.8200a/(46a+m)% | D.8200a/(69a+2m)% |
将a molNa和a molAl一同投入m g足量水中,所得溶液密度为d g·cm-3,该溶液的质量分数为
A.82a/(46a+m)% | B.82000a/(46a+2m)% |
C.8200a/(46a+m)% | D.8200a/(69a+2m)% |