Consider a voltaic cell based on the following cell reaction:
ni(s) + at2(s) ? ni2+(aq) + 2at– (aq)
given that the standard cell emf is 0.55 v, what is the standard reduction potential for astatine? [e°(ni2+/ni) = –0.25 v]

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?