Soru
Exercise A women's multivitamin supplement tablet contains 130 mg of calcium (Ca ). Calculate the number of Ca atoms in the tablet (assuming no other ingredient contains Ca).
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To calculate the number of calcium (Ca) atoms in the multivitamin tablet, we need to use Avogadro's number, which is 6.022 x 10^23 atoms per mole. This number represents the number of atoms in one mole of any substance.First, we need to determine the number of moles of calcium in the tablet. We can do this by dividing the mass of calcium in the tablet (130 mg) by the molar mass of calcium (40.08 g/mol):130 mg / 40.08 g/mol = 3.25 x 10^-3 molNow, we can calculate the number of calcium atoms in the tablet by multiplying the number of moles of calcium by Avogadro's number:3.25 x 10^-3 mol * 6.022 x 10^23 atoms/mol = 1.96 x 10^21 atomsTherefore, there are approximately 1.96 x 10^21 calcium atoms in the multivitamin tablet.