Determine the number of atoms in a 48.3-g sample of zinc. express your answer in zinc atoms using scientific notation.

To answer this question, you need to know the molecular weight of zinc so you can determine how many mol zinc you have. Zinc molecular weight is 65.38gram/mol. Then the calculation would be: 48.3gram / (65.38gram/mol) = 0.74 mol

Since you are asked the amount of atom, you need to multiply the unit in mole with Avogadro number. The calculation should be: 0.74 * 6.02 * 10^23 = 4.45 * 10^23 molecules