Sketch a voltaic cell for each overall redox reaction. Label the anode and cathode and indicate the half-reaction occurring at each electrode and the species present in each solution. Also indicate the direction of electron flow. a. 2 Ag+(aq) + Pb(s) → 2 Ag(s) + Pb2+(aq)
b. 2 ClO2(g) + 2 I−(aq) → 2 ClO2−(aq) + I2(s)
c. O2(g) + 4 H+(aq) + 2 Zn(s) → 2 H2O(l) + 2 Zn2+(aq)

i think it is true since you can test the answer and can use observations to complete it.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the ratio of the conjugate base to the acid required to attain the desired ph.