Explanation:
Principal quantum number=n=7
Azimuthal quantum number=l:-



M2= 0.35M
Formula: M1 • V1 = M2 • V2
1) 25.0mL • .500M = 35.5mL • (x)
2) 12.5 = 35.5 • (x)
3) 12.5/35.5 = x
4) 0.35211 = x = M2
Hope this helps!
Answer:
i think b is the answer hope this helps:))