Question

please answer this both question please please please it is so much important

Answer 1

4. i) CaCO3

molar mass = 40 + 12 + ( 16×3)

= 2496

mass = mole × molar mass

= 1×2496

= 2496

ii) Na2SO4.10H2O

m.m = 170

iii) CaCl2

m.m = 40+(35.5 ×2)

= 111

iv) Mg

m.m = 24