Answer :

Given: Mass of CO2 = 88g

Gram molecular mass of CO2 = 44g


To calculate the number of molecules, first we apply the formula:





Number of gram molecules = 2


Now, number of molecules = 2 × 6.022 × 1023


= 1.2 × 1024


Thus, number of molecules of CO2 is 1.2 × 1024


There are three atoms in CO2 (1atom of carbon and two atoms of oxygen)


Total number of atoms = 3 × Number of molecules


= 3 × 1.2 × 1024


= 3.6 × 1024


Thus, total number of atoms of CO2 is 3.6 × 1024


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