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]

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Which three statements represent the benefits of performing experiments using computer simulations?