Question

qual e a massa molecular do substancia mg So4 3 H 2o

Answer 1

MgSO4 . 3H2O = 

Mg= 24
S= 32
O= 16 . 4 = 64

24 + 32 + 64 = 120

H= 1 . 2 = 2
O= 16

3(16+2) = 54

120 + 54 =174

Massa molecular = 174