Scientist assume that an organism's ancestors required a climate similar to the climate required by the present-day organism.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

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.