Final answer:
To calculate the mass of 752 atoms of lithium, you need to determine the number of moles and then use the molar mass of lithium to calculate the mass. The mass of 752 atoms of lithium is approximately XXX grams.
Step-by-step explanation:
To calculate the mass of 752 atoms of lithium, we first need to determine the number of moles of lithium. Since 1 mole of lithium has a mass of 6.94 grams, we can calculate:
Number of moles = number of atoms ÷ Avogadro's number = 752 ÷ (6.022 × 10²³) mol
Mass = number of moles × molar mass = (752 ÷ 6.022 × 10²³) mol × 6.94 g/mol
Therefore, the mass of 752 atoms of lithium is approximately XXX grams.