Question

to find moles of an element in a compound we have to use valency electrons or mass number??

Answer 1

mass number is needed to find moles its formula is (given mass in Q./ atomic mass or mass no.

Answer 2

To find Moles of an element:

* Mass number can be used.
* Standard volume can be used.
* It's ratio with the product can be
used.

Hope it helps............