Ms. Wolfe's Chemistry Final Exam Review

When you fry an egg, the egg turns brown. This is an example of:

• change in energy

• change in properties

When you turn on a light, the bulb gets hot. This is an example of:

• change in energy

• change in properties

When you activate an ice pack, the chemical reactions makes it cold. This is an example of:

• endothermic reaction

• exothermic reaction

When you light a match, the fire is hot. This is an example of:

• endothermic reaction

• exothermic reaction

The chemical symbol for rust is Fe2O3. How many oxygen atoms are in rust?

• 1

• 2

• 3

Which side is the "reactant" side?

• CH4 + 2 O2

• CO2 + 2 H2O

Which side is the "product" side?

• AB + C

• A + BC

According to the Law of Conservation, matter can be created and destroyed in a chemical reaction.

• true

• false

Water is also known as H2O. The "2" means there are 2 atoms of:

• hydrogen

• oxygen

The chemical formula for ammonia (the cleaner in "windex") is NH3. How many Nitrogen atoms are in a molecule of ammonia?

• 3

• 1