In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn ? Zn+2 + 2e- rxn B: 2 NH4+ + 2e- ? 2 NH3 + H2 Which reaction is taking place at the cathode?
A) rxn A
B) rxn B
C) Both reactions are happening at both the anode and cathode.
D) Both reactions are happening are happening at the electrode.
E) The reaction takes place at the electrode, not the cathode.
B
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The 1970 Clean Air Act and subsequent environmental regulations have resulted in
A) reductions in lead by about 99%. B) reductions in carbon monoxide by about 10%. C) surprising increases in sulfur dioxide levels by about 5%. D) surprising increases in radon levels by about 20%.
There are a number of ways that frauds may be carried out to try to receive excess compensation. Which of the following is not one of those methods?
A. Exaggeration of hours worked B. Falsification of overtime or holiday time worked, payable at a higher rate C. Understatement of job related expenses D. Falsification of sales in order to increase commission payouts
What are two examples of geology-related environmental concerns? Briefly explain why geology
holds an important position in environmental science What will be an ideal response?
The hydrosphere is the earth's intensely hot core, thick mantle, composed mostly of rock, and the thin outer crust.
Answer the following statement true (T) or false (F)