Question

Calculate the number of molecules in

720 gm of quick lime.​

Answer 1

Answer:

3.011×10

22 molecules

Explanation:

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

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Answer 2

Answer:

n=W/M

720/56

=12.85 × 6.023 ×10²³

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