CHEM 101 MIDTERM LATEST
IVY TECH
A 250 gram sample of water at the boiling point had 45.0 kJ of heat
added. How many grams of water were vaporized? Heat of vaporization
for water is 40.6 kJ/mole. - ANSWERS-20.0
Which compound in liquid form will have the highest vapor pressure? -
ANSWERS-CH4
Which intermolecular force is common to all polar molecules but NOT
nonpolar molecules? - ANSWERS-dipole-dipole forces
How much energy does it take to melt a 16.87 g ice cube?
ΔHfus= 6.02 kJ/mol - ANSWERS-5.64 kJ
NaCl is which type of solid? - ANSWERS-ionic solid
How many kilojoules of heat are needed to completely vaporize 42.8
grams of C4H10O at is boiling point? Given ΔHvap= 26.5 kJ/mol -
ANSWERS-15.3
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PAGE
1
, CHEM 101 MIDTERM LATEST
IVY TECH
What volume (L) of 2.00 M KCl solution contains 25.0 g of KCl? -
ANSWERS-0.168
We dissolve 2.45 g of sugar in 200.0 g water. What is the mass percent
of sugar in the solution? - ANSWERS-1.21%
How much water would you ADD to 175 mL of 6.00 M hydrochloric
acid to prepare a 2.00 M solution of this acid? - ANSWERS-350 mL
If you add 1.00 mL of pure water to 6.00 mL of 0.750 NaCl solution,
what is the concentration of sodium chloride in the diluted solution? -
ANSWERS-0.642 M
Which among the following is NOT true about the solubility of a solid in
water? - ANSWERS-none of the above
Suppose a vodka martini contains 30% alcohol with the remaining
portion of the drink composed of water. What is the solute in this type of
martini? - ANSWERS-alcohol
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PAGE
2
, CHEM 101 MIDTERM LATEST
IVY TECH
You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best
procedure is to weigh out: - ANSWERS-21.2 g Na2CO3 and add water
until the final solution has a volume of 2.00 L
How many grams of LiF would be present in 575 mL of 0.750 M LiF
solution? - ANSWERS-11.2
What is the molarity of a solution prepared by dissolving 10.7 g NaI in
0.250 L? - ANSWERS-0.286
What is the final concentration of a solution prepared by diluting 35.0
mL of 12.0 M HCl to a final volume of 1.20 L? - ANSWERS-0.350 M
What is the definition of a scientific theory? - ANSWERS-a model that
explains the underlying reasons for observations and laws
What term best describes a brief statement that summarizes many past
observations and predicts new ones? - ANSWERS-scientific law
Which of the following is an example of a scientific law? - ANSWERS-
In a chemical reaction, matter is neither created nor destroyed.
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PAGE
3
IVY TECH
A 250 gram sample of water at the boiling point had 45.0 kJ of heat
added. How many grams of water were vaporized? Heat of vaporization
for water is 40.6 kJ/mole. - ANSWERS-20.0
Which compound in liquid form will have the highest vapor pressure? -
ANSWERS-CH4
Which intermolecular force is common to all polar molecules but NOT
nonpolar molecules? - ANSWERS-dipole-dipole forces
How much energy does it take to melt a 16.87 g ice cube?
ΔHfus= 6.02 kJ/mol - ANSWERS-5.64 kJ
NaCl is which type of solid? - ANSWERS-ionic solid
How many kilojoules of heat are needed to completely vaporize 42.8
grams of C4H10O at is boiling point? Given ΔHvap= 26.5 kJ/mol -
ANSWERS-15.3
END OF
PAGE
1
, CHEM 101 MIDTERM LATEST
IVY TECH
What volume (L) of 2.00 M KCl solution contains 25.0 g of KCl? -
ANSWERS-0.168
We dissolve 2.45 g of sugar in 200.0 g water. What is the mass percent
of sugar in the solution? - ANSWERS-1.21%
How much water would you ADD to 175 mL of 6.00 M hydrochloric
acid to prepare a 2.00 M solution of this acid? - ANSWERS-350 mL
If you add 1.00 mL of pure water to 6.00 mL of 0.750 NaCl solution,
what is the concentration of sodium chloride in the diluted solution? -
ANSWERS-0.642 M
Which among the following is NOT true about the solubility of a solid in
water? - ANSWERS-none of the above
Suppose a vodka martini contains 30% alcohol with the remaining
portion of the drink composed of water. What is the solute in this type of
martini? - ANSWERS-alcohol
END OF
PAGE
2
, CHEM 101 MIDTERM LATEST
IVY TECH
You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best
procedure is to weigh out: - ANSWERS-21.2 g Na2CO3 and add water
until the final solution has a volume of 2.00 L
How many grams of LiF would be present in 575 mL of 0.750 M LiF
solution? - ANSWERS-11.2
What is the molarity of a solution prepared by dissolving 10.7 g NaI in
0.250 L? - ANSWERS-0.286
What is the final concentration of a solution prepared by diluting 35.0
mL of 12.0 M HCl to a final volume of 1.20 L? - ANSWERS-0.350 M
What is the definition of a scientific theory? - ANSWERS-a model that
explains the underlying reasons for observations and laws
What term best describes a brief statement that summarizes many past
observations and predicts new ones? - ANSWERS-scientific law
Which of the following is an example of a scientific law? - ANSWERS-
In a chemical reaction, matter is neither created nor destroyed.
END OF
PAGE
3
