Question

Calculate the number of moles in 10g of MgO. (O : 16 g.mol^-1; Mg: 24 g.mol^-1)

Answer 1

Answer:

mol. wt. of MgO= 24+16

=40g

40g of MgO-1 mole

10g of MgO-x mole

X=10÷40

=0.4moles