Show:
Chemical Reactions
Chemical Reactions II
Chemical Reactions III
Chemical Reactions IV
Potpourri
100
One of the following is NOT a physical change: splitting wood, melting ice, burning wood or dissolving salt in water.
What is burning wood?
100

In the formula 5CaSO4, this is the number of oxygen atoms.

What is 20?

100

Substance(s) that enters a chemical reaction is called this (on the left side of the reaction).

What is a reactant?

100
A reaction that releases energy is called this.
What is exothermic?
100

My First name. 

What is Lucas?

200
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
200

DOUBLE JEOPARDY!!!!!!!!!!

C3H8 + O2 ->3CO2 + 4H2O + thermal energy is this type of reaction.

200
When two or more simple substances combine to form a new, more complex substance it is this type of reaction.
What is synthesis?
200
DOUBLE JEOPARDY!!!!!!!!!!!!!
A chemical reaction in which energy is absorbed.
200

The type of chemical reaction that occurs when soda goes flat. 

What is decomposition?

300

The number that describes how many molecules of a substance are involved in a chemical reaction.

What is a coefficient?

300

Two atoms of the same element that are commonly bonded together in nature.

What is a diatomic molecule?

300
DOUBLE JEOPARDY!!!!!!!!!
An expression in which symbols and formulas are used to represent a chemical reaction.
300

During a chemical reaction in which no new compounds are formed, what is said to have happened? 

What is no reaction?

300

State the Law of Conservation of Mass.

What is that matter can not be created or destroyed in a chemical reaction?

400
When balancing an equation, this can not be changed.
What is a subscript?
400

Define activation energy.

What is the energy required to start a chemical reaction?

400

An increase in temperature from an outside source will usually cause the rate of reaction to ________________.

What is increase?

400

The reaction 2HgO -> 2Hg + O2 is an example of this type of reaction.

What is decomposition?

400

DOUBLE JEOPARDY!!!!!!!!!!

A solid that forms from a solution during a chemical reaction.

500

DOUBLE JEOPARDY!!!!!!!!

What symbol indicates that heat is applied to a reaction?

500

Give 3 examples that a chemical reaction has taken place.

What is temp change, color change, the formation of gas, and the formation of a precipitate. 

500

Balance the reaction: C3H8 +O2 -> CO2 + H20

What is C3H8 + 5O2 -> 3CO2 + 4H2O

500

Balance the reaction: Na + H2O -> NaOH + H2

What is 2Na + 2H2O -> 2NaOH + H2

500

Balance the reaction: HCl + Ca(OH)2 -> CaCl2 + H2O

What is 2HCl + Ca(OH)2 -> CaCl2 + 2H2O