chemical Reactions

Question 0

The new substances that are formed as a result of a chemical change.

Answer 0

Product

Question 1

The substances that undergo a change in a chemical reaction.

Answer 1

reactant

Question 2

A representation of a chemical reaction in which the reactants and products are expressed as formulas.

Answer 2

Chemical Equation

Question 3

A number that is before the chemical formula in a chemical equation that represents the number of molecules or atoms in that equation.

Answer 3

Coefficient

Question 4

6.02 time 10^23 of something.

Answer 4

Mole

Question 5

The mass of one mole of a substance.

Answer 5

Molar Mass

Question 6

A reaction in which two or more substances react to form a single substance.

Answer 6

Synthesis Reaction

Asking someone to dance.

Question 7

A reaction where a compound break down into two or more substances.

Answer 7

Decomposition Reaction

Stop Dancing

Question 8

A reaction where one element (or polyatomic ion) takes the place of another element (or polyatomic ion).

Answer 8

Single Replacement Reaction

May I take this dance?

Question 9

A reaction where two different compounds exchange positive ion and form two new compounds.

Answer 9

Double Replacement Reaction

Switch dance partners.

Question 10

The energy stored in the chemical bonds of a substance.

Answer 10

Chemical Energy

If energy goes into a reaction that energy is stored in the bonds of the product. Energy cannot be created or destroyed.

Question 11

A reaction of a carbon containing molecule and oxygen that produces carbon dioxide and water.*

Answer 11

Combustion Reaction

Question 12

A reaction that involves the loss and gain of electrons.

Answer 12

Oxidation-Reduction Reaction

In Oxidation an electron is lost. In Reduction an electron is gained. It seems backwards because electrons have negative charges.

Question 13

A reaction where energy is released.

Answer 13

Exothermic

Exo- Outside Therm- Heat

Question 14

A reaction where heat is absorbed.

Answer 14

Endothermic

Endo-Inside Therm- Heat

Question 15

The energy that is required to start a chemical reaction.*

Answer 15

Activation energy

Even exothermic reaction have an activation energy. Otherwise those molecules would be too unstable to exist.

Question 16

Tell how fast or slow a reaction is occurring.

Answer 16

Reaction Rate

Question 17

A substance that speeds up a chemical reaction without being a part of the actual reaction.

Answer 17

Catalyst

Enzymes are catalysts in living things that speed up reactions to a speed that allows life to exist.

Question 18

A state where the forwards and backwards paths of a chemical reaction are the same.

Answer 18

Equilibrium

This term is used in other places besides chemistry.
The amount of product and reactant are constant, but the reaction continues just equally in both directions.

Question 19

A reaction that can run both ways simultaneously.

Answer 19

Reversible Reaction