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Stoichiometry Review Flashcards | StudBud
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Stoichiometry Review
Stoichiometry Review
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A #chemistry quiz review of high school #stoichiometry
Flashcards
20 cards
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Questions
20
Answers
1
In the reaction N
2
+ 3H
2
→ 2NH
3
, what is the mole ratio of nitrogen to ammonia?
1:2
1:3
1:1
2:3
2
Which of the following would
not
be studied in the branch of chemistry called stoichiometry?
the amount of energy required to break ionic bonds in NaCl
the mole ratio of Al to Cl in AlCl3
the mass of C when a known mass of sugar decomposes
the # of moles of H2 the react completely with excess of O2
3
When the limiting reactant in a chemical reaction is completely used, the...
reaction stops
reaction slows down
excess reactants begin combining
reaction speeds up
4
A balanced chemical equation allows one to determine the
mechanisms involved in the reaction
energy released in the reaction
electron configuration of all elements in the reaction
mole ratio of any two substances in the reaction
5
In the reaction N
2
+ 3H
2
→ 2NH
3
, what is the mole ratio of hydrogen to ammonia?
2:3
2:1
3:2
1:1
6
To balance a chemical equation, it may be necessary to adjust the
subscripts
number of products
formulas of the products
coefficients
7
To determine the limiting reactant in a chemical reaction, one must know the
speed of the reaction
amount of the product formed
available amount of one of the reactants
available amount of each reactant
8
What is the maximum possible amount of product in a chemical reaction?
actual yield
theoretical yield
percentage yield
mole ratio
9
In most chemical reactions the amount of product obtained is
equal to the theoretical yield
less than the theoretical yield
more than the theoretical yield
more than the percentage yield
10
Which reactant controls the amount of product formed in a chemical reaction?
mole ratio
limiting reactant
composition reactant
excess reactant
11
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
mole ratio
actual yield
percentage yield
Avogadro's yield
12
What is the study of the mass relationships among reactants and products in a chem. reaction?
chemical kinetics
chemical equilibrium
periodic law
reaction stoichiometry
13
IF the percentage yield is equal to 100%, then
the actual yield is less than the theoretical
the actual yield is equal to the theoretical yield
the actual yield is greater than the theoretical
there was no limiting reactant
14
The coefficients in a chemical equation represents the
relative numbers of moles of reactants and products
masses, in grams, o fall reactants and products
number of atoms in each compound in the reaction
number of valence electrons involved in the reaction
15
In the rxn. wA+xB→yC+zD, a comparision of the # of moles of A to the # of moles of C would be a
mass ration
electron ratio
energy proportion
mole ratio
16
In the reaction C + 2H
2
→ CH
4
, what is the mole ration of hydrogen to methane?
1:2
1:1
2:4
2:1
17
What is the measured amount of product obtained in a chemical reaction?
actual yield
mole ratio
percentage yield
theoretical yield
18
A chemist interested in the efficiency of a chemical reaction would calculate the
mole ratio
rate of reaction
energy released
percentage yield
19
A reaction involving substances A & B stops when B is completely used. B is the
primary product
primary reactant
limiting reactant
excess reactant
20
What is the study of the mass relationships of elements in compounds?
reaction stoichiometry
percent yield
composition stoichiometry
Avogadro's principle
