Question

Number of atoms in 20 gram of ca is equal to number of atoms in

Answer 1

To do that, you add up the atomic masses of each element. O3= 16AMU= 16g, and then times 3 for the subscript, so 48g. The total comes out to 100g, which we now know isequal to 1 mole of CaCO3. We have 20g of CaCO3, though, not 100g, so the answer is not 6.022x10 to the 23rd.