How many atoms are there in 100g of lead?

To find the number of atoms in 100 grams of lead, we first need to determine the molar mass of lead, which is approximately 207.2 g/mol. Using Avogadro's number (approximately (6.022 \times 10^{23}) atoms/mol), we can calculate the number of moles in 100 grams: (100 , \text{g} \div 207.2 , \text{g/mol} \approx 0.482 , \text{mol}). Multiplying the number of moles by Avogadro's number gives approximately (0.482 , \text{mol} \times 6.022 \times 10^{23} , \text{atoms/mol} \approx 2.90 \times 10^{23} , \text{atoms}) of lead in 100 grams.