chemistry chapter 9

molar mass can be used to relate

-mass of reactant to moles of reactant -moles of product to mass of product - mass of product to moles of product

actual yield is affected by

-side reactions that compete with the main reactions -impurities in the reactions -amount of reactions

what is the measured amount of product (using a laboratory balance) obtained from a chemical reaction

actual yield

when a chemical reaction is carried out under ideal conditions is assumed that

all reactions are completely converted into products

to determine the limiting reactant in a chemical reaction one must know the

available amount of all reactants

if you know the mole ratio of a reactant and product in a chemical reaction you can

calculated the mass of the product produced from a known mass of reactant

actual yield is determined by

experiments

the units of molar mass are

g/mol

the actual yield of a chemical reaction is generally

less than the theoretical yield

which reactant controls the amount of product formed in a chemical reaction

limiting reactant

the type of stoichiometry problem that involves the most steps is a

mass-to-mass conversion

a balanced chemical equation allows you to determine the

mole ratio of any two substances in the reaction

the efficiency of a chemical reaction is best expressed by the

percentage yield

when the limiting reactant in a chemical reaction is completely used the

reaction stops

the coefficients in a chemical equation represent the

relative numbers of moles of reactants and products

a chemical equation is balanced when the

same number of each kind of atom appear in the reactants and in the products

if percentage yield is equal to 100% then

the actual yield is equal to the theoretical yield

stoichiometry is based on chemical equations and

the law of conservation of mass

which of the following could be studied using stoichiometry

the mass of potassium required to produce a known mass of potassium chloride

knowing the mole ratio of a reactant and product in a chemical reaction would allow you to determine

the mass of the product produced from a known mass of reactant

which information is not needed to solve a mass-to-mass stoichiometric calculation

the mass ratio

the number of significant figures in an answer to a stoichiometry problem is determined only by

the number of significant figures of any measured quantities of reactants or products in the problem

the fewest steps are required to solve stiochiometry problems is when

the reactant is given in moles and the product is then calculated in moles

if a chemist calculates the maximum amount of product that could be obtained in a chemical reaction she is calculating the

theoretical yield

the limiting reactant of a reaction can be used to calculate the

theoretical yield

what is the maximum possible amount of product obtained in a chemical reaction

theoretical yield

molar masses are determined from

values found on the periodic table