Question

Calculate the nmber of moles for 56g of ne (atomic mass Ne =20u

Answer 1

No. of moles =given weight÷molecular weight.
So,
Acc to question
n=56÷20
=2.8

Answer 2

Given: 56 grams of Neon.

To find: We have to find the number of moles.

Solution:

The number of moles can be determined as follows-

The atomic mass of Neon is 20u.

Thus atomic weight of neon will be 20 grams.

Given that 56 grams of Ne.

We know that 20 grams of Ne will have 1 mole.

Thus 56 grams of Neon will contain 56/20=2.8 moles.

Thus 56 grams of Ne has 2.8 moles.