Chemical Reactions
One of the following is a chemical change, NOT a physical change: splitting wood, melting ice, burning wood or dissolving salt in water.
What is burning wood?
In the formula 5CaSO4, this is the number of oxygen atoms.
What is 20?
A substance that enters a chemical reaction is called this.
What is a reactant?
Cutting paper is an example of a physical or chemical change.
What is physical change?
This type of change in a substance's appearance is not a chemical change and is usually reversible.
What is a physical change?
C3H8 + O2 ----> 3CO2 + 4H2O + heat
the type of chemical reaction that releases heat
What is exothermic?
This type of change occurs when a substance or multiple substances rearrange and a new substance is created.
What is a chemical change?
A neutral PH example, PH Level 7.
What is Water?
Burning a marshmallow is an example of what type of change.
What is a chemical change?
The large number at the front of the chemical formula that tells you how many total molecules you have.
What is a coefficient?
The formula for calculating Density.
What is Density= Mass /Volume
An expression in which symbols and formulas are used to represent a chemical reaction.
A chemical equation
This type of reaction absorbs heat.
Endothermic Reactions
State the Law of Conservation of Mass.
What is "matter can not be created or destroyed in a chemical reaction"?
These numbers tell you the starting number of atoms in a chemical formula.
What is a subscript?
The substance produced at the end of a chemical reaction.
What is a product?
2HgO ---> 2Hg + O is an example of this type of chemical reaction.
What is decomposition?
This Contains 2 or more different atoms chemically combined, also categorized as a molecule
What is a Compound?
Give three examples that a chemical change has taken place.
What is heat is present, color change, new form of matter, cannot reverse it, formation of a gas, happens by itself?
What are the three types of synthetic products?
What are plant based, animal based and petroleum based?
Condensations is an example of what type of change.
What is a physical change?
As heat energy is added to a liquid the molecules do what.
What is speed up and spread apart?
The type of reaction would be represented below:
K + NaCl ----------> KCl + Na
What is single replacement?