A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?
A teacher places a penny into an amount of acid in a closed container to demonstrate a chemical change. The penny weighs 3 grams and the acid 230 grams. After the chemical reaction takes place, what will be the mass of the penny and acid?
Mrs. Godfrey wants to prove to her students that when an object is burned, its total mass is the same before and after the reaction. What should Mrs. Godfrey do to make sure this is shown by the experiment?
A jeweler melts gold to make jewelry. As the gold melts, the mass
Two kilograms of water are placed in a closed container. The container is placed in the freezer, and after a few hours it turns into ice. Which is most likely the mass of the ice?