a) M(NaOH) = n(1) × Ar(Na) + n(1) × Ar(O) + n(1) × Ar(H) = 22 + 16 + 1 = 39
b)M(Cu(OH)2) = n × Ar(Cu) + n × (n × Ar(O) + n + Ar(H)) = 64 + (16 + 1) × 2 = 98
a) M(NaOH) = n(1) × Ar(Na) + n(1) × Ar(O) + n(1) × Ar(H) = 22 + 16 + 1 = 39
b)M(Cu(OH)2) = n × Ar(Cu) + n × (n × Ar(O) + n + Ar(H)) = 64 + (16 + 1) × 2 = 98