Question

13:How many moles of Hydrogen are there in 7.9
X 1023 hydrogen atoms?
1.48 moles
1.311 moles
39.14 X 1023 moles
1.38 moles​

Answer 1

We know,

6.023 × 10^ 23 atoms = 1 mol

So, 7.9 × 10^ 23 atoms

= [1/(6.023 ×10^23) ]×(7.9×10^23 ) mol

= 1.311 moles

So, 2nd option will be correct option.