Show:
Classifying Matter
Phase changes
Kinetic theory of Matter
Chemical reactions and Chemical Equations
Balancing equations
100
Is sulfur and Iron a pure substance or mixture?
What is a pure substance?
100
There is an ice cube and it melts into a glass of water. (What type of phase change is this?)
What is a melting phase change?
100

The molecules and atoms are in constant motion, and the higher the temperature, the greater their speed.

What is the basis of the kinetic theory of matter?

100
When coal, which is mostly carbon, is burned the energy released is used to make electricity.
What is the most important example of a chemical change?
100

When a chemical equation has five 5 H atoms on its reactants side with 5 H atoms on its products side.

What is a balanced chemical equation?

200
Is salt water a pure substance or mixture?
What is a mixture?
200
The three states of matter: solid, liquid, gas.
What are phases of matter?
200

The phase of matter where atoms are moving but the matter doesn't appear to be moving because the atoms are moving in different directions, effecting no real movement

What is solid matter?

200

Elements in nature that are not composed of individual atoms, but individual molecules such as O2

What is homonuclear diatomics?

200

An important rule about subscripts when balancing chemical equations

You cannot change any of the numbers that appear in the subscripts.

300
A mixture with a composition that is always the same no matter what part of the sample you are observing.
What is a homogeneous mixture?
300

Going from a gas to a liquid

What is condensing?

300

As a substance's surroundings decrease in temperature, what becomes of the energy?

What is they lose energy?

300

Give three elements that exist as homonuclear diatomic molecules.

Oxygen, nitrogen, chlorine, flourine, bromine, iodine, astatine, hydrogen

300

Balanced or unbalanced?

N2 +H2 -->NH3

Unbalanced

400
Would a cake with frosting be a homogeneous or heterogeneous mixture?
What is a heterogeneous mixture?
400
Water occupies more volume in it's solid phase than it's liquid phase.
What is an exception to the phase change rule?
400
A temperature that which a substane changes form solid to liquid.
What is the melting point?
400

Reactant + Reactant= Product

What is a chemical reaction?

400

Balanced or unbalanced?

6CO2 +6H2O -->C6H12O6 +6O2

Balanced

500

The two main gases we breathe

What is nitrogen and oxygen?

500
A substance going from a liquid to gas.
What is boiling?
500
A temperature at which a substance goes from its liquid phase to its gas phase.
What is boiling point?
500

When there are an equal amount of atoms of each side of an equation.

What is a balanced chemical equation?

500

The balanced chemical equation for a reaction where solid calcium carbonate is made when solid calcium reacts with gaseous oxygen and solid carbon.

What is 2Ca (s) + 3O2 (g) + 2C (s) ---> 2CaCO3 (s)?