Given the following standard reduction potentials at 25°C:
Half reaction
Ag (aq) + e → Ag (S)
Cu(ag) + 2e → Cu (S)
Ni?' (ag) + 2e → Ni (s)
Cr+ (aq) + 3e → Cr(s)
Reduction Potential (V)
+ 0.80
+0.34
- 0.28
-0.74
1. Combine these reduction half-reactions into a redox reaction (hint-one will be a
reduction, the other will be an oxidation) such that the Ecell is the smallest positive value
possible.
Balanced redox reaction:
Eceh
mV
2. What is 'n' from the reaction above? n=
moles electrons
3. What is delta G and is this reaction spontaneous or not? delta G=
4. What is K?K=
5. Is the reaction product-favored or reactant favored?

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.