Which has the greatest number of molecules? A)28 g of nitrogen, N₂ B)32 g of oxygen, O₂ C)32 g of methane, C H₄ D)38 g of fluorine, F₂

Question

Quizplus · Accepted Answer

The molar mass of nitrogen is 28 g/mol, so 28 g of nitrogen corresponds to 1 mole, or approximately 6.02 x 10^23 molecules. 
The molar mass of oxygen is 32 g/mol, so 32 g of oxygen corresponds to 1 mole, or approximately 6.02 x 10^23 molecules. 
The molar mass of methane is 16 g/mol, so 32 g of methane corresponds to 2 moles, or approximately 1.20 x 10^24 molecules (since each molecule contains 4 atoms). 
The molar mass of fluorine is 38 g/mol, so 38 g of fluorine corresponds to 1 mole, or approximately 6.02 x 10^23 molecules. 
Therefore, the substance with the greatest number of molecules is methane (choice C).

Which Has the Greatest Number of Molecules