Which sample contains the fewest atoms? a. 10 g of c b. 10 g of ne c. 10 g of f d. 10 g of n e. 10 g of o

The molar mass and the mass of the substance give the moles of the substance. The 10-gram sample of neon (Ne) has the fewest atoms. Thus, option b is correct.

What are moles?

Moles of the substance are the ratio of the molar mass and the mass of the substance. The moles of each atom with respect to the Avagadro's number (Nₐ) is given as,

Moles = mass ÷ molar mass

Moles of carbon (C) = 10 ÷ 12

= 0.83 Nₐ atoms

Moles of neon (Ne) = 10 ÷ 20

= 0.5 Nₐ atoms

Moles of fluorine (F) = 10 ÷ 19

= 0.52 Nₐ atoms

Moles of nitrogen (N) = 10 ÷ 14

= 0.7 Nₐ atoms

Moles of oxygen (O) = 10 ÷ 16

= 0.63 Nₐ atoms

Therefore, option b. 10 gm neon has the fewest atoms.

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