Answer:
V = 12.2 mL
Step-by-step explanation:
First, we need to find the smallest division in the scale of the buret, considering the nine markings between 12 mL and 13 mL on the buret:
[tex]n= \frac{(13 - 12)}{9} = 0.111 mL[/tex]
Between the second and the third marking from the 12 mL mark, the volume is:
[tex]V= n*2 + \frac{n}{2} = 0.11*2 + \frac{0.11}{2} = 0.275 mL [/tex]
So, we can now calculate the volume in the buret:
[tex]V= 0.275 + 12 = 12.2 mL [/tex]
Have a nice day!