Question

calculate number of molecules in 5.5 g of CO2.
give the answer in molecules.

Answer 1

number of molecules = # of moles × Avogadro number  

# of moles = mass / molecular mass  

mole= 12.5  

number of molecules = 12.5 ×6.022×10^23  

So,  75.275×10^23

Answer 2

there will be.. 7.525 × 10^22 molecules in 5.5 g CO2

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