Question

How many miles dose 11gm of CO2 contain ?

Answer 1

O2 has a molecular mass of 44g/mol (use a periodic table: 12+16+16), then number of moles is given by 
n=m/Mr 
= 11/44
=0.25mol
And as said earlier, that means you have 0.25mol CO2s, hence 0.25mol Cs and 0.50mol Os

Answer 2

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