Chapter 12 Flashcards
(18 cards)
the starting substance in a chemical reaction
reactant
the ending substance in a chemical reaction
product
study of quantitative relationships between amounts of reactants used and products formed by a chemical reaction
stoichiometry
ratio between numbers of moles of any two substances in a balanced chemical equation
mole ratio
amount of each reactant at the start of a chemical reaction determines the
end
balanced chemical equations give us the particle and mole relationships in
chemical reactions
coefficient represents not only individual particles, but number of
moles of a particle
a process in which the atoms of one or more substances are rearranged to form different substances
chemical reaction
the study of the quantitative relationships between the amounts of reactants used and the amounts of products formed by a chemical reaction is called stoichiometry
true
stoichiometry is based on the law of conservation of mass
true
in any chemical reaction, the mass of the products is less than the mass of the reactants
false
the coefficients in a chemical equation represent not only the number of individual particles but also the number of moles of particles
true
the mass of each reactant and product is related to its coefficient in the balanced chemical equation for the reaction by its molar mass
true
in some mole-to-mass conversions, the number of moles of the known substance is given. In those conversions, which step of the above solution is not necessary?
step 2
a series of actions or operations
process
maximum amount of product that can be produced from a given amount of reactant
theoretical yield
amount of product actually produced when chemical reaction is carried out in an experiment
actual yield
of a product is the ratio of the actual yield to the theoretical yield, times 100 percent
percent yield
