Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 5 Weeks Ago, 1 Day Ago |
Questions Answered: | 7559 |
Tutorials Posted: | 7341 |
BS,MBA, PHD
Adelphi University/Devry
Apr-2000 - Mar-2005
HOD ,Professor
Adelphi University
Sep-2007 - Apr-2017
Question 1
1 / 1 pts
A __________ reaction occurs when one element replaces a portion of another compound to produce two new products.
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 decompositionÂ
 combinationÂ
 synthesisÂ
 single replacementÂ
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Question 2
1 / 1 pts
__________ are the relative amount of each substance that is involved in the reaction.
Â
 SolubilityÂ
 Mass reactantsÂ
 Stoichiometric coefficientsÂ
 S orbitalsÂ
Â
Question 3
1 / 1 pts
Percent yield can be calculated using which of the following formulas?
Â
 (Actual Yield - Theoretical yield) x 100%Â
 (Actual Yield)(Theoretical yield) x 100%Â
 (Actual Yield/Theoretical yield) x 100%Â
 (Actual Yield +Theoretical yield) x 100%Â
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Question 4
1 / 1 pts
If velocity increases, kinetic energy __________.
Â
 decreasesÂ
 stays the sameÂ
 fluctuatesÂ
 increasesÂ
Â
Question 5
1 / 1 pts
__________ ions are those that are present in solution but do not participate in the overall reaction.
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 NegativeÂ
 PositiveÂ
 SpectatorÂ
 SingleÂ
Â
Question 6
1 / 1 pts
__________ have a definite volume but no definite shape.
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 SolidsÂ
 GasesÂ
 LiquidsÂ
 CompoundsÂ
Â
Question 7
1 / 1 pts
The __________ the viscosity, the slower the flow of the material.
Â
 slowerÂ
 weakerÂ
 lowerÂ
 higherÂ
Â
Question 8
1 / 1 pts
According to the kinetic-molecular theory of gases, gas particles are in __________ motion.
Â
 intermolecularÂ
 predictableÂ
 constantÂ
 slowÂ
Â
Question 9
1 / 1 pts
Balance this equation: P4O10 + H2O → H3PO4
Â
 4P4O10 + 3H2O → 6H3PO4
  P4O10 + 6H2O → 4H3PO4
 2P4O10 + H2O → 3H3PO4
 P4O10 + 4H2O → 4H3PO4
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Question 10
1 / 1 pts
In a __________ reaction, the cations from the original two ionic compounds trade anions to make two new ionic compounds.
Â
 decompositionÂ
 synthesisÂ
 double replacementÂ
 combinationÂ
Â
Question 11
1 / 1 pts
__________ occurs when a hydrocarbon reacts in the presence of oxygen to produce water and carbon dioxide.
Â
 StoichiometryÂ
 SolubilityÂ
 CombustionÂ
 SynthesisÂ
Â
Question 12
1 / 1 pts
In a __________ reaction, a single chemical species breaks down to produce two or more new chemical species.
Â
 decompositionÂ
 single replacementÂ
 combinationÂ
 synthesisÂ
Â
Question 13
1 / 1 pts
Mole ratios can be made between which of the following?
Â
 one reactant and one productÂ
 two products or two reactantsÂ
 two products onlyÂ
 two reactants onlyÂ
Â
Question 14
1 / 1 pts
__________ is a measurement of a fluid's resistance to flow.
Â
 AdhesionÂ
 MassÂ
 ViscosityÂ
 Surface tensionÂ
Â
Question 15
1 / 1 pts
Anything that has mass and is moving is said to have __________ energy.
Â
 lightÂ
 solidÂ
 kineticÂ
 particleÂ
Â
Question 16
1 / 1 pts
The _________ yield is the amount of product produced for a given chemical reaction.
Â
 limitingÂ
 theoreticalÂ
 percentÂ
 actualÂ
Â
Question 17
1 / 1 pts
CH4 + 2O2 → CO2 + 2H2O
Â
Which of the following is a reactant in the above equation?
Â
 CH4
 CO2
 None of these.Â
 H2O
Â
Question 18
1 / 1 pts
Vapor pressure __________ as the strength of intermolecular forces increase.
Â
 stays the sameÂ
 is unpredictableÂ
 increasesÂ
 decreasesÂ
Â
Question 19
1 / 1 pts
In a __________ chemical equation, the number of atoms of each element on the reactant side is equal to the number of atoms on the product side.
Â
 balancedÂ
 compoundÂ
 decomposedÂ
 stoichiometricÂ
Â
Question 20
1 / 1 pts
C + O2 → CO2 is an example of a(n) __________ reaction.
 metallicÂ
 combinationÂ
 single replacementÂ
 decompositionÂ
Â
Question 21
1 / 1 pts
Fireworks are also called __________.
Â
 medievalÂ
 inertÂ
 pyrotechnicsÂ
 pure substancesÂ
Â
Question 22
1 / 1 pts
The __________ yield represents the maximum amount that could be generated from the given amounts of reactants
Â
 actualÂ
 theoreticalÂ
 percentÂ
 limitingÂ
Â
Question 23
1 / 1 pts
The reactant that is completely consumed in a reaction is called a(n) __________ reactant.Â
Â
 limitingÂ
 excessÂ
 molarÂ
 stoichiometricÂ
Â
Question 24
1 / 1 pts
_________ is caused by the attraction of liquid molecules due to various intermolecular forces.
Â
 Vapor pressureÂ
 AdhesionÂ
 Surface tensionÂ
 ViscosityÂ
Â
Question 25
1 / 1 pts
__________ pressure is a measure of pressure exerted by a gas above a liquid in a sealed container.
Â
 AtmosphericÂ
 SolidÂ
 VaporÂ
 IonicÂ
Â
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