H2 is produced by the reaction of 118.5 ml of a 0.8775 M solution of H3PO4 according to the following equation: 2Cr + 2H3PO4 -> 3H2 + 2C-PO4

(a) Outline the steps necessary to determine the number of moles and the mass of H2 produced.
(b) Perform the calculations outlined.

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.

They cool it down and aluminum cools easily

Ithink ahopefully im correct 

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.