How many atoms are in 121 grams of calcium?

Answer 1

To find the number of atoms in 121 grams of calcium, first determine the number of moles of calcium. The molar mass of calcium is approximately 40.08 grams per mole, so 121 grams of calcium is about 3.02 moles (121 g / 40.08 g/mol). Since one mole contains Avogadro's number of atoms (approximately (6.022 \times 10^{23}) atoms), you can calculate the total number of atoms: (3.02 \text{ moles} \times 6.022 \times 10^{23} \text{ atoms/mole} \approx 1.82 \times 10^{24} \text{ atoms}).