H2 + O2 -> H20
How many grams of water are produced when 2.03 g of O2 are used?

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

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.

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.