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 that make up all of the matter we observe are always in constant motion. AND 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
Some matter cannot move anywhere because all of its molecules and atoms are moving in different directions. (what phase of matter?)
What is solid matter?
200
Elements in nature that are not composed of individual atoms.
What is homonuclear ditamtics?
200
You cannot change any of the numbers that appear in the subscripts.
What is the most important rule when balancing chemical equations?
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
The most common phase.
What is the gas phase?
300
As a substance's surroundings decrease in temperature, energy travels out of the molecules (or atoms) in the substance and into the surroundings.
What is heat traveling from a hot body to a cold body?
300
Nitrogen, oxygen, chlorine, fluorine, bromine, iodine, astatine, hydrogen.
What is homonuclear diatomic molecules?
300
Trying the number of molecules involved in the reaction to work out.
What is the goal of balancing chemical equations?
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
Carbon plus oxygen yields carbon dioxide.
What is chemical reaction?
400
When there are 6 nitrogen atoms on the reactants side and 1 nitrogen atom on the products side.
What is an imbalanced equation?
500
When you burn a piece of paper.
What is a chemical change?
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 they 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) + 3O (g) + 2C (s) ---> 2CaCO (s)? 2 3