
Moles of copper nitrate:-

- 1mol of Copper nitrate reacts with 2mol NaOH
- 0.001mol will react with 0.002mol NaOH
Madd of NaOH

I think its Helium correct me if I'm wrong plz.
B, a. hopefully that helps
Answer:
B
Explanation:
You take the 50-69 and you add up the students and it will allow you to get 7