How many atoms are there in 40.2 g of tin (Sn)?

Answer 1

To find the number of atoms in 40.2 g of tin (Sn), first determine the molar mass of tin, which is approximately 118.71 g/mol. Then, calculate the number of moles in 40.2 g by dividing the mass by the molar mass: ( \frac{40.2 , \text{g}}{118.71 , \text{g/mol}} \approx 0.339 , \text{mol} ). Finally, multiply the number of moles by Avogadro's number ((6.022 \times 10^{23} , \text{atoms/mol})) to find the total number of atoms: ( 0.339 , \text{mol} \times 6.022 \times 10^{23} \approx 2.04 \times 10^{23} , \text{atoms} ).