Answer:
Step-by-step explanation:
1) Data:
a) M = ?
b) n = 0.400 mol
V = 9.79 liters
2) Formula:
3) Solution:
- M = 0.400 mol / 9.79 liter = 0.04086 M
- Since each data contain 3 significant digits, the answer must be reported with 3 significant digits. So, the correct answer is 0.0409 M, which is the option B.