HESI-A2 Chemistry Study Guide & Practice Questions

1. Matter that has a definite shape and volume

Answer:  solid

2. Matter that changes in volume with changes in temperature and pressure

Answer: gas

3.  A ____________ change of matter is when no change is made to the chemical composition of a substance.

Answer: physical

4. Simplest of substances and is represented by a letter or letters

Answer: element

5. Law that states matter can neither be created nor destroyed during a chemical reaction

Answer: Law of conservation of mass

6. The breaking of bonds and reforming of new bonds to create new chemical compounds with different chemical formulas and different chemical properties

Answer: Chemical reaction

7.  5 main chemical reactions: Answer

 synthesis,

decomposition, 

combustion,

single replacement, 

double replacement

8. Chemical reaction in which 2 elements combine to form a product?

Answer: synthesis

9. Chemical reaction that is the breaking of a compound into component parts?

Answer:  decomposition