How many atoms are in 129g of calcium?

Answer 1

129 grams calcium (1 mole Ca/40.08 grams calcium)(6.022 X 10^23calcium atoms/1 mole Ca)

= 1.94 X 10^24 atoms of calcium

Answer 2

To determine the number of atoms in 129g of calcium, you first need to convert the mass into moles using the molar mass of calcium. The molar mass of calcium is approximately 40.08 g/mol. By dividing 129g by the molar mass of calcium, you find that there are approximately 3.22 moles of calcium. Finally, you would multiply the number of moles by Avogadro's number (6.022 x 10^23) to find the number of atoms, which would be approximately 1.94 x 10^24 atoms.