Molar mass of Ca = 40.08 g/mol
mass(Ca)= 153 g
use:
number of mol of Ca,
n = mass of Ca/molar mass of Ca
=(1.53*10^2 g)/(40.08 g/mol)
= 3.817 mol
use:
number of atoms = number of moles * Avogadro’s number
= 3.817 * 6.022*10^23 atoms
= 2.30*10^24 atoms
Answer: 2.30*10^24 atoms
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