In science we frequently assume that some variables are not affecting our experiment. what are some good reasons for making assumptions?
a) the assumption variable has been tested previously by other scientists.
b) the assumption has been believed to not affect tests for over a decade.
c)the assumptive variable was tested separately from the experiment itself.
d)the assumption has been made by prominent scientists.

Ithink the answer is 10.576

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.