When the number of atoms on each side of the equation is equal, the equation is
What is balanced
100
Symbols and numbers that areused to describe a compound or substance
What is chemical formula
100
An equation in which one product is made from multiple reactants.
What is synthesis
100
Raising the temperature of the reactants causes them to move ___________ and causes more ___________ between atoms.
What are faster, collisions
100
The creation of energy in the form of _______ or _______ is a sign of chemical reaction
What is heat, light
200
These are used to help balance equations
What are coefficients
200
The compounds that begin a chemical reaction are called
What reactants
200
When ions from two compounds switch places forming two new compounds, you have this type of reaction.
What is double replacement
200
By adding more reactants to a reaction you are increasing the ____________ and making it more likely that atoms will react.
What is concentration
200
A reaction that gives off excess energy is called _________
What is exothermic
300
Chemical equations must be balanced to satisfy the Law of _______________ ___ ______.
What is Conservation of Mass
300
The energy needed to start a chemical reaction.
What is activation energy
300
The reaction shown in this equation: AB--> A + B
What is decomposition
300
To speed up reactions you could break your reactants into smaller pieces. This is an example of increasing _________ _____.
What is surface area
300
What is the reaction type: 2Na + 2H2O --> 2NAOH + H2
What is single replacement
400
Balance: Fe + O2 --> Fe2O3
What is 4Fe + 3O2 --> 2Fe2O3
400
chemical that is introduced into a reaction to help the reaction start.
What is a catalyst
400
In a combustion reaction, ___________ is needed to help the fuel burn.
What is oxygen
400
Squeezing your reactants into a smaller volume of space increases ____________ causing more collisions between reactants.
What is pressure
400
In the equation Mg + O --> MgO, MgO is what part of the equation.
What is the product
500
Balance C6H6 + O2 --> CO2 + H2O
What is 2C6H6+ 15O2 --> 12CO2+ 6H2O
500
A chemical that is used to slow down chemical reactions.
What is an inhibitor
500
Which type of reaction is represented by the following equation: AB + C --> AC + B
What is single replacement
500
The larger and more complex the reactants, the more difficult it is for reactions to occur. This is because the size and shape of compounds can hide the ___________ site, making it difficult to break bonds.
What is active or reactive
500
A change in _____________ _________ is the only for sure indicator that a chemical reaction has occurred.