Answer:
A. 52.8
Explanation:
We make use of the dilution formula to solve this
[tex]M_1\times V_1 =M_2\times V_2[/tex]
Where ([tex]M_1[/tex] and [tex]M_2[/tex] are the initial molarity and final molarity and [tex]V_1[/tex] and [tex]V_2[/tex] are the initial volume and final volume)
Plugging into the values in the formula
[tex]M_1\times V_1 =M_2\times V_2[/tex]
[tex]7.91M \times V_1=2.13M \times 196.1mL[/tex]
[tex]V_1=\frac {(2.13M \times 196.1mL)}{7.91M}[/tex]
= 52.8 mL is the Answer
