Which of the following weighs more:32 g of oxygen,2g of nitrogen3.022x10^23 atoms of C?

No. of moles present in 3.022 x 1023 atoms of carbon = 3.022 x 1023/6.022 x 1023

= 0.5 moles

Molar mass of carbon = 12g = 1 mole

mass present in 0.5 moles = n x M = 0.5 x 12g = 6g

Thus, 32g of oxygen weighs more than 2g of nitrogen and 3.022 x 1023 atoms of carbon

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