Chemistry 151-Final Exam |! |! |!
with complete solutions |! |!
determine the oxidation state of nitrogen in NaNO2 - Correct answer ✔+3
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a 12.39g sample of phosphorus reacts with 42.54g of chlorine to form only
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phosphorus trichloride. If it is the only product, what mass of PCl3 is formed?
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- Correct answer ✔54.93g
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True or False: at very high pressures, a gas will occupy a larger volume than
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predicted by the ideal gas law - Correct answer ✔True
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determine the molarity of a solution formed by dissolving 97.7g LiBr in enough
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water to yield 750.0 mL - Correct answer ✔1.50M
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what element is undergoing oxidation in the following reaction: Zn + 2AgNO3-
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> Zn(NO3)2 + 2Ag - Correct answer ✔Zn
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determine the oxidation state of Carbon in CO2 - Correct answer ✔+4
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what is the concentration of CH3OH in a solution prepared by dissolving 12.5g
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of CH3OH insufficient water to give exactly 230mL of solution? - Correct
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answer ✔1.70M |!
,The capacity to do work is ___ - Correct answer ✔energy
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Identify ammonia - Correct answer ✔weak electrolyte, weak base
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identify the gas particle that travels the fastes? - Correct answer ✔H2
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force exerted per unit area by gas particles as the strike the surfaces around
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them is___ - Correct answer ✔pressure
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determine the density of NH3 gas at 435K and 1.00 atm - Correct answer
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✔0.477g/L
determine the density of N2 gas at STp - Correct answer ✔1.25g/L
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Give the spectator ions for the reaction that occurs when aqueous solutions
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H2SO4 and KOH are mixed - Correct answer ✔K+ and SO2-4
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partial pressure of water in a gaseous mixture - Correct answer ✔vapor
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pressure
which of the following signs on q and w represent the surrounding that is
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doing work on the system, as well as losing heat to the surroundings? -
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Correct answer ✔q= -, w=+ |! |! |! |!
, Determine the theoretical yield of HCl if 60.0 g of BCl3 and 37.5 g of H2O are
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reacted according to the following balanced reaction. A possibly useful molar
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mass is BCl3 = 117.16 g/mol.
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|! BCl3(g) + 3 H2O(l) → H3BO3(s) + 3 HCl(g) - Correct answer ✔56.0g HCL
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define an Arrhenius acid - Correct answer ✔produces H+ ions in aqueous
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solution
True or False: change in Erxn is a measure of heat - Correct answer ✔False
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what element is undergoing oxidation in the following reaction?
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CH4 + 2O2-> CO2 + 2H20 - Correct answer ✔C
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which of the following signs on q and w represent a system that is doing work
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on the surroundings, as well as losing heat to the surroundings - Correct
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answer ✔q=-; w=- |! |!
what kind of acid is H2SO4 - Correct answer ✔polyprotic
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Two samples of calcium fluoride are decomposed into their constituent
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elements. The first sample produced 0.154 g of calcium and 0.146 g of
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fluorine. If the second sample produced 294 mg of fluorine, how many g of
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calcium were formed? - Correct answer ✔0.309g
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with complete solutions |! |!
determine the oxidation state of nitrogen in NaNO2 - Correct answer ✔+3
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a 12.39g sample of phosphorus reacts with 42.54g of chlorine to form only
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phosphorus trichloride. If it is the only product, what mass of PCl3 is formed?
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- Correct answer ✔54.93g
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True or False: at very high pressures, a gas will occupy a larger volume than
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predicted by the ideal gas law - Correct answer ✔True
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determine the molarity of a solution formed by dissolving 97.7g LiBr in enough
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water to yield 750.0 mL - Correct answer ✔1.50M
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what element is undergoing oxidation in the following reaction: Zn + 2AgNO3-
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> Zn(NO3)2 + 2Ag - Correct answer ✔Zn
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determine the oxidation state of Carbon in CO2 - Correct answer ✔+4
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what is the concentration of CH3OH in a solution prepared by dissolving 12.5g
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of CH3OH insufficient water to give exactly 230mL of solution? - Correct
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answer ✔1.70M |!
,The capacity to do work is ___ - Correct answer ✔energy
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Identify ammonia - Correct answer ✔weak electrolyte, weak base
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identify the gas particle that travels the fastes? - Correct answer ✔H2
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force exerted per unit area by gas particles as the strike the surfaces around
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them is___ - Correct answer ✔pressure
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determine the density of NH3 gas at 435K and 1.00 atm - Correct answer
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✔0.477g/L
determine the density of N2 gas at STp - Correct answer ✔1.25g/L
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Give the spectator ions for the reaction that occurs when aqueous solutions
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H2SO4 and KOH are mixed - Correct answer ✔K+ and SO2-4
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partial pressure of water in a gaseous mixture - Correct answer ✔vapor
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pressure
which of the following signs on q and w represent the surrounding that is
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doing work on the system, as well as losing heat to the surroundings? -
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Correct answer ✔q= -, w=+ |! |! |! |!
, Determine the theoretical yield of HCl if 60.0 g of BCl3 and 37.5 g of H2O are
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reacted according to the following balanced reaction. A possibly useful molar
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mass is BCl3 = 117.16 g/mol.
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|! BCl3(g) + 3 H2O(l) → H3BO3(s) + 3 HCl(g) - Correct answer ✔56.0g HCL
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define an Arrhenius acid - Correct answer ✔produces H+ ions in aqueous
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solution
True or False: change in Erxn is a measure of heat - Correct answer ✔False
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what element is undergoing oxidation in the following reaction?
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CH4 + 2O2-> CO2 + 2H20 - Correct answer ✔C
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which of the following signs on q and w represent a system that is doing work
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on the surroundings, as well as losing heat to the surroundings - Correct
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answer ✔q=-; w=- |! |!
what kind of acid is H2SO4 - Correct answer ✔polyprotic
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Two samples of calcium fluoride are decomposed into their constituent
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elements. The first sample produced 0.154 g of calcium and 0.146 g of
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fluorine. If the second sample produced 294 mg of fluorine, how many g of
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calcium were formed? - Correct answer ✔0.309g
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