Question
6.4 g of oxygen is equivalent to
- 0.4 mol of oxygen atoms
- 0.4 mol of oxygen molecules
- 0.2 mol of oxygen atoms
- none of these
Answer
0.4 mol of Oxygen atoms
Explanation
If the 6.4 g corresponds to O atoms, then the number of moles of O atoms is:
n = m/M = 6.4 g / 16 g/mol = 0.4 mol
Therefore, 6.4 g of O is equivalent to 0.4 mol of O atoms.