Question

Define mole.Calculate the number of moles in 4g sodium hydroxide ​

Answer 1

The amount of substance is defined as a mole.

No of moles =Given Mass

Molecular Mass

=4g

Mass of Na+Mass of H+Mass of O

=4g

23+16+1

=4g

40

=1

10

=0.1

So, the no. of moles in 4g of sodium hydroxide is 0.1