Stoichiometry Test Flashcards
All stoichiometric calculations involving equations use _______ ratios.
mole
When solving stoichiometric problems, you must _______ the equation first.
balance
_____ in chemical equations provide mole ratios that can be used as conversion factors
Coefficients
What is molar mass?
the mass of one mole of a substance
A limiting reactant determines:
the amount of product formed
Actual yields must be determined by:
experiments
Theoretical yield must always be calculated from:
limiting reactant
Define stoichiometry.
Relationship between the quantities of substances/chemicals
When does a double replacement reaction take place?
when one of the products forms a precipitate
The conversion factor for converting between mass and moles is the ______ of the substance.
molar mass
In making calculations involving _______, you must convert volume to mass.
liquids
To convert from volume to mass, you can use the _____ of the substance as the conversion factor.
density
When calculating the number of particles, you can use ________ as the conversion factor.
avogadro’s number
A __________ reactant is not completely used up in a chemical reaction.
excess
A ________ reactant is used up first and thus controls the quantity of ________ that can be formed in a chemical reaction.
limiting, product
The reactant that runs out first is the ______ reactant.
limiting
The limiting reactant should be used in _____ calculations to determine the maximum amount of product expected.
stoichiometric
Cost is a factor in selecting the _______ reactant.
limiting
The _______ yield is a way to describe reaction efficiency.
percent
The percentage yield describes how close the ______ yield is to the ______ yield.
actual, theoretical
The percentage yield figures can be used to predict what the _____ yield will likely be.
Mole ratios are :
conversion factors used to convert moles of one substance into moles of another
Define actual yield.
how much product is actually produced by the reaction/ always less than the theoretical yield
Define percent yield.
convenient way to described the efficiency of the reaction
