HESI-A2 CHEMISTRY Chemistry note cards for HESI entrance exam Question Answer Matter that has a definite shape and volume solid Matter that changes in volume with changes in temperature and pres- sure gas A change of matter is when no change is made to the chemical composition of a sub- stance. physical Simplest of substances and is rep- resented by a letter or letters element Law that states matter can neither be created nor destroyed during a chemical reaction Law of conservation ...

Name: Date: Student Exploration: Stoichiometry Vocabulary: Avogadro’s number, balanced equation, cancel, coefficient, conversion factor, dimensional analysis, molar mass, mole, molecul ar mass, stoichiometry Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. A 250 mL glass of orange juice contains 22 grams of sugar. How much sugar is in a two-liter (2,000 mL) bottle of orange juice? 176g 2. It requires two sticks of butter to make a batch of 20 cookies. How much butter will it tak...

Name: Date: Student Exploration: Reaction Energy Vocabulary: calorimeter, chemical bond, endothermic, enthalpy, exothermic, Hess’s law Prior Knowledge Questions (Do these BEFORE u sing the Gizmo.) 1. Two magnets are stuck together. What might you have to do to get them to separate? Pull them apart 2. Suppose you held two magnets a short distance apart, then let go. What would happen? If opposite poles they would stick together, but if they were the same, they’d spin away from each other 3. T...