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Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships amond reactants and products in chemical reactions?
stoichemistry
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Which of the following would be investigated in reaction stoichemistry?
relative numbers of moles of reactants and products
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The coefficients in a chemical equation represent the
relative numbers of moles of reactants and products
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A balanced chemical equation allows one to determine
mole ratio of any two substances in a reaction
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In a chemical equation wA+xB yiels to yC+zD, if one knows the mass of A and the molar masses of A, B, C, and D one can determine
the mass of any of the reactants or products
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The units of molar mass are
g/mol
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Given the equation 3A+2B yields to 2C, the starting mass of A, and its molar mass, and you are asked to determine the moles of C produced, your first step in solving the problem is to multiply the given mass of A by
(1 mol A/molar mass A)
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Acids generally release H2 gas when they react with
active metals
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Acids react with
bases to produce salts and water
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Which of the following is not an oxyacid?
H2O2
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Compared with acids that have the suffiz -ic acids that have the suffiz -ous contain
less oxygen
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Which acid is produced in the stomach?
hydrochloric acid
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The traditional definition of acids is based on the observation of
Arrhenius
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Which statement about Arrhenius acids is false?
They increase the concentration of hydroxide ions in aqueous solution
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In water, hydroxides of Group 2 metals
are all strong bases
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Many organic compunds, such as codeine, that contain nitrogen are
weak bases
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Which of the following is a tripotic acid?
H3PO4
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Whose definition of acids and bases emphasizes the role of protons?
Bronsted and Lowry
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How many conjugate acid-base pairs participate in a Bronsted-Lowry acid-base reaction?
two
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A Bronsted-Lowry acid is a
proton donor
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A Lewis acid is
an electron-pair acceptor
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Whose acid definition is the broadest
Lewis
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A Lewis base is an
electron-pair donor
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In the reaction represented by the equation HF+H2O yields to H3O+ +F-, a conjugate acid base pair is
H3O+ and HF
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Another conjugate acid-base pair
HF and F-
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The conjugate of a strong base is a
weak acid
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An amphoteric species is one that reacts as an
acid or base
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A salt is not
a proton donor
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Which of the following is not a reactant in a neutralization reaction?
a salt
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Which compound is produced by a neutralization?
H2O
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Pure water contains
water molecules, hydronium ions, and hydroxide ions
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Pure water partially breaks down into charged particles in a process called
self-ionization
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What is the Concentration of H3O+ ions in pure water?
10-7
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