Final answer:
To find the number of atoms of calcium in 1.00 g, we calculate the moles using the atomic mass and then multiply by Avogadro's number, resulting in approximately 1.50×10²² atoms.
Step-by-step explanation:
To determine how many atoms of calcium are in 1.00 g of calcium, you must first calculate the number of moles of calcium in that mass. Using the atomic weight of calcium, which is approximately 40.08 g/mol, you can use the formula:
number of moles = mass (g) / molar mass (g/mol)
For 1.00 g of calcium, the number of moles would be calculated as follows:
number of moles = 1.00g / 40.08g/mol = 0.02494 moles of calcium
To find out the total atoms, we apply Avogadro's number, which is approximately 6.02×10²³ atoms per mole. Multiplying the number of moles by Avogadro's number gives us:
number of atoms = 0.02494 moles × 6.02×10²³ atoms/mole
Therefore, 1.00 g of calcium contains approximately 1.50×10²² atoms of calcium.