If an element has the atomic mass (A) of 80 and its atomic number (Z) is 35, how many neutrons does it have? 42
35
45
79

The answer is 1.82 j/g°c                  

Man i dont know this answer

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.