A galvanic cell is composed of these two half cells, with the standard reduction potentials shown CO2+(aq) + 2 e‑ º Co(s) ‑0.28 volt
Cr3+(aq) + 3 e‑ º Cr(s) ‑0.74 volt
The actual Co2+(aq) concentration is 0.00100 M, while the Cr3+(aq) concentration is unknown.
The actual cell potential Ecell measured 0.38 volts. What is the actual concentration of the Cr3+ ion
in the cell?
a. 0.00180 M
b. 0.00500 M
c. 0.0090 M
d. 0.0360 M
e. 0.360 M

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent

What type of chemical reaction occurs between silver nitrate (agno3) and copper (cu)? the equation i was given is 2agno3 + cu —> 2ag+ cu(no3)2.

Charles's law describes the relationship of the volume and temperature of gas at a constant mass and pressure. according to this law, what would happen to the temperature of the gas if its volume decreased from 1.0 l to 0.50 l?