In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: If something has a small surface area and is being mixed with something else it will react 
 Answer: slower
[EX A]: Surface Area of Reactants When a solid substance is involved in a chemical reaction, only the matter at the surface of the solid is exposed to other reactants. If a solid has more surface area, more of it is exposed and able to react.

[EX Q]: Question: The largest alkenes should have the _____ boiling and melting points. 
 Answer: lowest
[EX A]: Larger alkenes have lower boiling and melting points, so they are liquids or waxy solids at room temperature.

[EX Q]: Question: A very rarefied medium will cause light to move 
 Answer: faster
[EX A]:
The more dense the medium, the slower the light moves.