When a person says "I think that between an elephant and a monkey that jumped off the cliff, both of them will hit the ground at the same time." the person is stating his A. Hypothesis
B. Law
C. Observation
D. Theory​

When balancing a chemical equation:

How many molecules are in 6.0 moles of methane

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.