Allen is carrying out reactions in a lab. one of the products in all reactions is found to be either a precipitate, a gas, or water. what is common between all these reactions?

Using the periodic table, complete the table to describe each atom. type in your answers

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

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.