Question

What mass of CO2 will contain same number of atoms as are contained in 20 g of oxygen?

Answer 1

32g of O2= 2 x N atoms  (N=avogadro no.)

    20g "    "  =(2/32) x 20 N = 1.25 N atoms

    44g of CO2= 3 x N

     1.25 N = (44/3) x 1.25= 18.33g of carbon dioxide

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