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Stoichiometry Flashcards | StudBud
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Stoichiometry
Stoichiometry
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#balanced #chemical
Flashcards
25 cards
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Questions
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Answers
1
Fewer steps are required to solve stoichiometry problems when?
Reactant is given in liters & the product is sought in #'s
Reactant is given in grams & the product is sought in grams.
Reactant is given in grams & the product is sought in liters
Reactant is given in moles & the product is sought in moles.
2
A balanced chemical equation allows one to determine?
Mole ratio of any two substances in a reaction.
Energy released in the reaction
Mechanism involved in the reaction
Electron confuguration of all elements in the reaction
3
What is the atomic mass of Magnesium-26 ?
24 grams/mole
26 amu
24 amu
26 grams/mole
4
If you have 1 mole of H
2
0 , how may L is that ?
67.2L
44.8L
22.4L
Not enough information given.
5
What is the first step in solving a problem in stoichiometry ?
Balance the equation
Mole ratio
Convert to moles
Convert to desired units
6
Heat of transition is the heat evolved or absorbed, when a substance is converted from ?
One allotropic form to another
Vapor to liquid
Vapor to solid
Solid to liquid
7
Measurement of the amount of dry gas collected over water from volume of moist gas is based on
Boyle's law
Charle's law
Avogadro's hypothesis
Dalton's Law of Partial Pressures
8
A mole ratio is ?
a ratio
a fraction
a conversion factor
All of the above
9
Which of the following elements does not exist as a diatomic molecule ?
Carbon
Chlorine
Oxygen
Hydrogen
10
Recycling in a chemical process facilitates ?
Heat conservation
All three
Increased yield
Enrichment of product
11
At STP, which is equivalent to 1 mole ?
GFM
22.4L
All of the above
6.02 x 1023 particles
12
Dissolving a solute in a solvent does not change its ?
Viscosity
Specific heat
None of these
Vapour pressure
13
Solutions having the same osmotic pressure is called what kind of solution ?
Isotonic
Ideal
Saturated
Dilute
14
A solution with reasonably permanent pH is called ?
Non-ideal
Buffer
Colloidal
Ideal
15
A vapor that exists above its critical temperature is termed as a ?
Unsaturated vapor
Sub-cooled vapor
Saturated vapor
Gaseous vapor
16
Which reactant is the excess reactant ?
N2
N2
NH3
H2
17
The actual yield a chemical reaction is generally ?
less than the theoretical yield
equal to the percentage yield
greater than the theoretical yield
greater than the percentage yield
18
What is the ratio of the actual yield to the theoretical yield, multiplied by 100% ?
Excess yield
Avogadro yield
Mole ratio
Percent yield
19
Can the normality of a solution be numerically equivalent to its molarity?
Probably
Yes
IDK
No
20
What reactant is the limiting reactant ?
NH3
H2
N2
More than one is the limiting reactant
21
Heat of what of a fuel is called calorific value?
Combustion
Vaporization
Reaction
Formation
22
Actual yield must be determined by ?
Theoretical yield
Estimation
Experiments
Calculations
23
The coefficients in a chemical equation represent the?
Number of atoms in each compound in a reaction
Number of valence electrons involved in the reaction
Relative numbers of moles of reactants and products
Masses, in grams, of all reactants and products
24
True or False: A percent yield of 90% - 100% is common in chemistry ?
True
False
Probably
Idk
25
Which reactant controls the amount of product formed in a chemical reaction?
mole ratio
excess reactant
limiting reactant
composition reactant
