Lori asked in Science & MathematicsChemistry · 8 months ago

How many atoms are in 65.5g of potassium oxide (K2O)?

I am stuck on this question, can someone please show me the steps in calculating this problem?

2 Answers

  • 8 months ago

    Molar mass of K2O is 94.2 g/mol, so the 65.5g would be 0.695 moles, which is 4.19 x 10^23 molecules. Each molecule has 3 atoms, so there are 1.26 x 10^24 atoms here.

  • 8 months ago

    First determine the molecular mass of K2O.

    65.5g K2O x (Imole K2O/94.2gK2O) x 6.02x10^23 molecules/1mole K2O) x (3 atoms in one molecule/1mole of K2O) = the answer to the problem.

Still have questions? Get answers by asking now.