Jawabanmu

2014-05-04T17:21:22+07:00
Massa H20 = 38 - 20 = 18 gr
 \frac{massa MgSO4}{Mr MgSO4}  =  \frac{massa H20}{Mr H20}
 \frac{20}{120}  \frac{18}{18}
1= 6
jadi x = 6
rumus senyawanya MgSO4.6H2O

Semoga Bermanfaat :D
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