Question

Tentukan Mr
A) fe 2(so4) 3,7h20
B)NaH C03

Answer 1

A.Mr Fe₂(SO₄)₃.7 H₂O =
    Untuk Fe = 2 x 12 = 24 +S = 3 x 32 = 96 + O = 12 x 16 = 192 dan Mr H = 2 x 1 = 2 serta O = 16.Maka Mr Fe₂(SO₄)₃ = 24 +96 +192 +18 = 330
B.Mr NaHCO₃ = 23 + 1 + 12 + 48 = 84.