Question

Hitunglah massa molorkul relatif(Mr) zat-zat berikut A.Ca3(PO4)2 B.Na2HPO4 C. H2C2O4 D.CuSO4.5H2O SORRY lumayan susah tapi tolong y

Answer 1

A. Ca3(PO4)2
mr ---> 3 × ArCa + 2 × Ar P + 8 × ArO
mr ---> 3 × 40 + 2 × 31 + 8 × 16
= 310
b. Na2HPO4
mr = 2 × 23 + 1×1 + 1×31 + 4×16
mr = 142
c. H2C2O4
mr = 2×1 + 2×12 + 4×16
mr = 90
d. CuSO4
mr = 1×64 + 1×32 + 4×16
mr = 160
e. H2O
mr = 2×1 + 1×16
mr = 18