Ni2+ (aq) + Cd(8) ► Ni(s) + Cd2+ (aq) Ecoll = +0.15 V
Under standard conditions, a Ni-Cd galvanic cell generates a potential of +0.15 V using the chemical reaction represented above. Which of the following best explains how
(Ni2+] > 1 M affects the cell potential if this is the only change made to the operation of the galvanic cell?
A The ratio
CA
is smaller if Ni2+] > 1 M, resulting in Q < 1 and Ecell > E" cell
B
The ratio
Npr, is smaller if [Ni?+] > 1 M, resulting in Q >1 and Eclt > E" cells
С
The ratio
(NI
(C4"
is larger if (Ni?] > 1 M, resulting in Q > 1 and Ecell < E" cell
D
The ratio
IN
Cd?!
is larger if (Ni2+] > 1 M, resulting in Q < 1 and Ecell < Ecell

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

What is the mass of each element in a 324.8 sample of co2