Science Homework Help

Please answer the question and show the steps

the electrolysis of water absorbs 286 KJ for each mole of liquid water decomposes into its elements.

a) is this reaction exothermic or endothermic?

b) write the thermochemical equation

c) how many grams of hydrogen gas can be collected if 5,000KJ of energy are absorbed?

d) if 28.241 g of hydrogen gas are collected,what is the percent yield?