How many molecules are in 68.2 g of Ne?

Answer 1

To find the number of molecules in 68.2 g of neon (Ne), first, determine the molar mass of neon, which is approximately 20.18 g/mol. Then, calculate the number of moles in 68.2 g by dividing the mass by the molar mass: (68.2 , \text{g} \div 20.18 , \text{g/mol} \approx 3.38 , \text{mol}). Finally, use Avogadro's number ((6.022 \times 10^{23} , \text{molecules/mol})) to find the number of molecules: (3.38 , \text{mol} \times 6.022 \times 10^{23} , \text{molecules/mol} \approx 2.03 \times 10^{24} , \text{molecules}).