A _ is two or more substances that are together in the same place but are not chemically combined.

How can you use chemical equations to predict the products of the reaction you can carry out?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.