Jawabanmu

2014-04-13T12:42:10+07:00
A. mr = gram : mol= 4 : 0,25 = 16
2014-04-13T14:15:01+07:00
Massa = mr x mol 16 = 0.2 mol x mr mr = 16/0.2 mr = 32 gr/ mol
3 4 3