Question

calculate the number of molecules present in 5 moles of CaO​

Answer 1

Answer:

Explanation:Given that

Mass of CaO,W=2.8 g

Moles mass of CaO,M=56 g/mol

∴ Number of moles of CaO,n=

M

W

​

=

56

2.8

​

mol

=0.05 moles

∴ Number of molecules ,N=n×N

A

​

=0.05×6.022×10

23

=3.011×10

22

molecules