Answer: The concentration of
is 0.369 M.
Step-by-step explanation:
Given:
= 72.4 mL,
= ?
= 47.8 mL,
= 0.56 M
Formula used to calculate the concentration of
is as follows.

Substitute the values into above formula as follows.

Thus, we can conclude that the concentration of
is 0.369 M.