According to theory, which phrase best describes the universe before the big bang? a. a star b. a planet c. a cloud of gas and dust d. a densely packed space

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.

What’s the theoretical yield of solid lead

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?