Answer:
3.01×10²³ particles.
Explanation:
From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ particles. This implies that 1 mole of N2O5 also contains 6.02×10²³ particles.
Now, if 1 mole of N2O5 contains 6.02×10²³ particles ,
Then 0.5 mole of N2O5 will contain = 0.5 × 6.02×10²³ = 3.01×10²³ particles.
Therefore, 0.5 mole of N2O5 contains 3.01×10²³ particles.
