Which of the following has the greatest number of particles?
A) 1 mole of Na
B) 22.990 g of Na
C) 1 mole of Be
D) 9.012 g of Be
E) All are the same.
Question 2
The following set of redox reactions takes place as shown.
Container A Container B
Fe Fe2+ + 2e- Cu2+ + 2e- Cu
If you had two containers filled with the ion solution described above with a wire connecting a piece of iron (in container A) and a piece of copper (in container B) and a salt-bridge connecting the two containers, describe what happens.
A) A little bit of iron is converted into iron ions and a little bit of copper ion is converted into copper metal.
B) All of the iron is transformed into iron ions and all of the copper is transformed into copper ions.
C) All of the iron is transformed into iron ions and all of the copper ions are transformed into copper metal.
D) All of the iron ions are transformed into iron metal and all of the copper is transformed into copper ions.
E) All of the iron ions are transformed into iron metal and all of the copper is transformed into copper metal.
Question 3
What are the major natural sources of potassium used by plants?
A) It is extracted from rocks.
B) It is formed by atmospheric reaction of potassium and oxygen during lightning strikes.
C) It is extracted from seawater by specialized bacteria in phytoplankton.
D) all of the above
E) only A and B
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