I think its mass of volume
CO2 + H2O + Energy are the comments
We know that when calculating percent yield, we use the equation:

Since the quantities that we are given in the question are equal, we can just directly divide them to find percent yield:

So now we know that the percent yield of the synthesis is 87.27%.
That would be an endothermic reaction! :)
Answer:
1. The graph where x axis and y axis are present is called coordinate.
4. 18