Which of the following is always necessary for a chemical reaction to occur between two reactants,A and B?
A) A and B must be present in the same physical state.
B) There must be equal amounts of A and B present.
C) A and B must collide with sufficient energy and the proper orientation.
D) The reaction must be carried out at room temperature.
E) The reaction must be carried out at a temperature higher than room temperature.
Correct Answer:
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