1.03!! Very easy you welcome:)
Your question looks a bit incomplete as you have the same contents in options a) and d). According to your list, I can't see the correct answer, but I can give you one.The difference between the potential energy of the products of the potential energy of the reactants is equal to the enthalpy of the reaction.
I honestly have no clue on this one
Answer: The maximum number of balloons that can be inflated is 955
Explanation: Please see the attachments below