Question

Calculate number moles of magnesium in magnesium oxide mgo in 80g and 10 g

Answer 1

Answer:

Given : mass of MgO= w =80 gram

Molecular mass= M = 24+ 16 =40 g/mol

To find = moles of MgO

Soln: we know that

w=n×M

So n=w/M

So 80/40

= 2mol

Also  10 gm of compound

n=w/M

10/40

= 1/4

=0.25

Explanation: