Answer:
100 moles of Oxygen
Explanation:
We are given;
1.20 x 10^25 molecules of N₂O₅
- We are required to determine the number of moles of Oxygen in 1.20 x 10^25 molecules of N₂O₅.
We know that;
- 1 mole of N₂O₅ contains 6.022 x 10^23 molecules of N₂O₅
- Therefore, we can determine the number of moles of N₂O₅ containing 1.20 x 10^25 molecules of N₂O₅.
Moles = Number of molecules ÷ Avogadro's number
= 1.20 x 10^25 molecules ÷ 6.022 x 10^23 molecules/mole
= 19.9 moles
= 20 moles
But, 1 mole of N₂O₅ contains 5 moles of Oxygen
Therefore;
20 moles of N₂O₅ will have;
= 20 moles × 5
= 100 moles
Therefore,1.20 x 10^25 molecules of N₂O₅ contains 100 moles of oxygen.
