What is the standard cell potential of a cell made of theoretical metals ma/ma2+ and mb/mb2+ if the reduction potentials are -0.19 v and -0.85, respectively?

a) +0.66 V
b) -0.66 V
c) +1.04 V
d) -1.04 V

explanation:

detials on each model with digrams

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

it's filtration, but this is an assumption so my apologies if i got this