Question

Jika diketahui massa atom relatic dari atom unsur H = 1 : N = 4 : S = 32 : AI = 27 : O = 16. Cu = 63 hitunglah massa molekul relatif (MR) dari senyawa berikut:

A.(NH4)2 SO4
B.Cu SO4 . 5H2O
​

Answer 1

Jawaban:

a. Mr (NH4)2SO4 = Mr N2H8SO4

= (2 × Ar N) + (8 × Ar H) + Ar S + (4 × Ar O)

= (2 × 4) + (8 × 1) + 32 + (4 × 16)

= 8 + 8 + 32 + 64

= 112

b. Mr CuSO4.5H2O = Mr CuSO9H10

= Ar Cu + Ar S + (9 × Ar O) + (10 × Ar H)

= 63 + 32 + (9 × 16) + (10 × 1)

= 63 + 32 + 144 + 10

= 249