URGENT please how do you do the work and what is the answer step by step

b) Calculate the energy released per gram of pentaborane-9 that reacts. (2 marks) (A 1.9 k, A 1.4 k}/)

Does anyone have the expertise to help with this problem? Ismore information needed to solve it? Please help if youcan.

Need step by step answer to Step Cfor the following problem:

Beginning with 150.0 mL of 0.175 M ammonia, determine thesolution’s pH after each of the following steps:

b) after 25.0 mL of 0.200 M nitric acid, HNO3, is added(Answer to this step is pH =9.88)

c) after 25.0 mL of 0.400 M ammonium chloride is added to thesolution resulting from step (b),

Given the answer to Step b, what isthe answer to step c?