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WorksheetsReview in General Chemistry
Total questions: 15
Worksheet time: 8mins
When balancing equations, what can be placed to the left of a formula of a substance to make the equations balanced?
charge
subscript
random number
coefficient
What is a chemical equation?
A short way to show a chemical reaction using symbols
A way to explain a chemical reaction using words
A way to show a physical change using symbols.
A way to show a physical change using words.
What are the substances at the beginning of a chemical reaction are called?
product
yield
chemical symbol
reactants
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
the product is doubled
the product is half the mass of the reactants
the mass is the same
the mass changes depending on the reaction
What does the Law of Conservation of Mass state?
That atom can be created or destroyed in a chemical reaction.
You can have unequal amount of atoms on both sides of a chemical equations
That atom cannot be created nor destroyed in a chemical reaction.
That conserving energy is important.
when does a reaction stop?
When it wants to
when both the limiting and excess reactants are gone
when all the excess reactants have been consumed
when all the limiting reactants have been consumed
What is the amount produced in a perfect reaction called?
theoretical yield
actual yield
percent yield
stoichiometry
If the percentage yield is equal to 100%, then
the actual yield is greater than the theoretical yield
the actual yield is less than the theoretical yield
the actual yield is equal to the theoretical yield
there was no limiting reactant
What must you now to determine the limiting reactant in a chemical reaction?
amount of product formed
available amount of one of the reactants
available amount of each of each reactant
speed of the reaction
The actual yield of a chemical reaction is generally ___.
less than the theoretical yield
equal to the theoretical yield
greater than the theoretical yield
greater than the percentage yield
If the quantities of reactants are given in units other than moles, what is the first step for determining the amount of product?
Determine the amount of product from the given amount of limiting reagent.
Convert each given quantity of reactant to moles.
Identify the limiting reagent.
Which of the following best describes a limiting reactant?
slows down the reaction
is used up first
is the reactant that is left over
controls the speed of the reaction
Which law describes that the volume of a gas is inversely proportional to its pressure at constant temperature?
Charles'
Boyles'
Daltons'
Ideal
What quantity of gasses can be measured?
Pressure and Volume
Temperature, Pressure, and Volume
Volume and Temperature
Pressure, Temperature, Volume, and Moles
In order to solve gas law calculations, temperature must be measured in:
Fahrenheit
Celsius
Kelvin
