Why does a glowing splint of wood burn only slowly in air, but rapidly in a burst of flames when placed in pure oxygen?
A. Pure oxygen is able to absorb carbon dioxide at a faster rate.
B. Oxygen is a flammable gas.
C. A glowing wood splint is actually extinguished within pure oxygen because there's no room for the smoke to expand.
D. There is a greater number of collisions between the wood and oxygen molecules.
Answer: D
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What will be an ideal response?
In which situation would you expect to be closest to peak load?
A) on a windy day B) on a cool, sunny day C) on an extremely hot day D) in the middle of a spring night E) Peak load is always the same, regardless of time or weather.
When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the molecular equation for this reaction?
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What happens to water velocity downstream? It generally 
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