Question
Calculate the number of moles of helium that contains 3.29 × 1021 atoms.
Answer
0.0054588 mol.
- Q:What is the atomic mass of helium? A:The atomic mass of helium is 4.003.
- Q:What is Avogadro's number? A:Avogadro's number is 6.022 × 1023.
- Calculation: 3.29 × 1021 atoms / 6.022 × 1023 atoms/mol = 0.0054588 mol.