1st qn - B
2nd qn - A
Last qn - Yes
It is group 16. That is, Chalcogens. They call it the oxygen family.
Answer: a) 49.8 gram
b) 47.0 %
Explanation:
First we have to calculate the moles of glucose

The balanced chemical reaction will be,

From the balanced reaction, we conclude that
As,1 mole of glucose produce = 2 moles of ethanol
So, 0.54 moles of glucose will produce =
mole of ethanol
Now we have to calculate the mass of ethanol produced


Now we have to calculate the percent yield of ethanol

Therefore, the percent yield is 47.0 %