Chemical Changes
Balancing Equations
Moles and Mass
Types of Reactions
Energy in Reactions
100
These are found on the right hand side of a chemical equation
What are the products
100
When the number of atoms on both sides of a chemical reaction are the same the chemical equation is considered to be
What is balanced
100
A measurement of the number of particles in a chemical reaction
What is a mole
100
The combination of 2 simple reactants to form a more complex product.
What is a synthesis reaction
100
The law that states the amount of energy going into a reaction has t be the same as the amount of energy after a reaction.
What is law of conservation of energy
200
The symbol that signifies a chemical reaction has taken place.
What is an arrow
200
Where do you need to add coefficients: HgO ---> Hg + O2
2HgO ---> 2Hg + O2
200
6.02 x 10^23
What is 1 mole
200
Oxygen is a reactant and Water can be a product in this type of reaction.
What is combustion
200
When more energy is released from a reaction it is this type of reaction
What is exergonic
300
The chemicals found on the left side of a chemical reaction
What are the reactants
300
Balance the following equation Mg + O2 ---> MgO
2Mg + O2 --->2MgO
300
If the molar mass of an element is 53 grams and you are given 1,283 grams of the element, how many moles do you have?
What is 24 moles
300
When something complex is broken down in to simpler products. Ex: digestion
What is decomposition
300
Thermal energy is needed for this type of reaction to continue.
What is Endothermic
400
The numbers in front of a compound that describe how many of each type of atom are called
What is a coefficient
400
Balance the following KOH + HCl ---> KCl + H2O
The equation is balanced
400
If the molar mass of an element is 13.45 g/mol, and you are given 5.36 moles, how many grams of the element do you have?
What is 72.09 grams
400
When one reactant is substituted for another. A + BC ---> AC + B
What is single replacement
400
When excess energy is released as thermal energy we have this type of reaction.
What is exothermic
500
Ca + H2O ---> Ca(OH)2 + H2 In the above reaction the products are:
Ca(OH)2 + H2
500
N2O5 + H2O ---> HNO3
N2O5 + H2O --> 2HNO3
500
When using chemical equations we use what unit when measuring molar mass?
What are grams
500
The positive ion in one compound is switched for the positive ion in the other compound.
What is double replacement
500
When a reaction needs energy to take place it is this type of reaction
What is endergonic
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