<span>I think it is a but dont take me for it. I searched it and thats what I found since liquid in beaker B is more dense then realtivley speaking the object is less dense compared other liquid and floats at a higher level.</span>
0.000345 in scientific notation is 3.45*10^-4
In redox reactions, there is no net loss or gain of electrons, so the answer is (1) equal to the total number of electrons gained
