When you are ready to record the total collected volume of hydrogen gas, it is only necessary to
subtract the buret scale reading from 50.00, then add Vsmall
subtract Vsmall from the buret scale reading
record the buret scale reading
add Vsmall to the buret scale reading
a. I don't see a question.
b. I have no idea what you're doing.
To record the total collected volume of hydrogen gas, you need to add the volume indicated by the buret scale reading to the volume of the smaller container (Vsmall).
First, subtract the buret scale reading from 50.00. This will give you the volume of gas collected in the buret.
Next, add the volume of Vsmall to the buret scale reading. This will give you the total collected volume of hydrogen gas.
So, the correct option is to subtract the buret scale reading from 50.00, and then add Vsmall.