Question 1

-How many grams of the compound in the figure above would be required to make 1 L of a 0.5 M solution?
(carbon = 12, oxygen = 16, hydrogen = 1)

Accepted Answer

A)   29
B)   30
C)   60
D)   150
E)   342

Question 2

A given solution contains 0.0001(10⁻⁴) moles of hydrogen ions [H⁺] per liter. Which of the following best describes this solution?

Accepted Answer

A)   acidic: will accept H⁺ from both strong and weak acids
B)   basic: will accept H⁺ from both strong and weak acids
C)   acidic: will give H⁺ to weak acids, but accept H⁺ from strong acids
D)   basic: will give H⁺ to weak acids, but accept H⁺ from weak acids
E)   acidic: will give H⁺ to both strong and weak acids

Question 3

A dietary Calorie equals 1 kilocalorie. Which of the following statements correctly defines 1 kilocalorie?

Accepted Answer

A)   1,000 calories, or the amount of heat required to raise the temperature of 1 g of water by 1,000°C
B)   100 calories, or the amount of heat required to raise the temperature of 100 g of water by 1°C
C)   10,000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°F
D)   1,000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°C
E)   1,000 calories, or the amount of heat required to raise the temperature of 100 g of water by 100°C

Question 4

Which of the following effects is produced by the high surface tension of water?

Accepted Answer

A)   Lakes don't freeze solid in winter, despite low temperatures.
B)   A water strider can walk across the surface of a small pond.
C)   Organisms resist temperature changes, although they give off heat due to chemical reactions.
D)   Evaporation of sweat from the skin helps to keep people from overheating.
E)   Water flows upward from the roots to the leaves in plants.

Question 5

If the pH of a solution is decreased from 9 to 8, it means that the

Accepted Answer

A)   concentration of H⁺ has decreased to one-tenth (1/10)  what it was at pH 9.
B)   concentration of H⁺ has increased tenfold (10X)  compared to what it was at pH 9.
C)   concentration of OH⁻ has increased tenfold (10X)  compared to what it was at pH 9.
D)   concentration of OH⁻ has decreased to one-tenth (1/10)  what it was at pH 9.
E)   concentration of H⁺ has increased tenfold (10X)  and the concentration of OH⁻ has decreased to one-tenth (1/10)  what they were at pH 9.

Question 6

Which of the following takes place as an ice cube cools a drink?

Accepted Answer

A)   Molecular collisions in the drink increase.
B)   Kinetic energy in the drink decreases.
C)   A calorie of heat energy is transferred from the ice to the water of the drink.
D)   The specific heat of the water in the drink decreases.
E)   Evaporation of the water in the drink increases.

Question 7

When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na⁺) and chloride ions (Cl⁻) . In contrast, the atoms of covalently bonded molecules (e.g., glucose, sucrose, glycerol) do not generally dissociate when placed in aqueous solution. Which of the following solutions would be expected to contain the greatest number of solute particles (molecules or ions) ?

Accepted Answer

A)   1 L of 0.5 M NaCl
B)   1 L of 0.5 M glucose
C)   1 L of 1.0 M NaCl
D)   1 L of 1.0 M glucose
E)   1 L of 1.0 M NaCl and 1 L of 1.0 M glucose will contain equal numbers of solute particles.

Question 8

Carbon dioxide (CO₂) is readily soluble in water, according to the equation CO₂ + H₂O ↔ H₂CO₃. Carbonic acid (H₂CO₃) is a weak acid. If CO₂ is bubbled into a beaker containing pure, freshly distilled water, which of the following graphs correctly describes the results?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 9

The molar mass of glucose (C₆H₁₂O₆) is 180 g/mol. Which of the following procedures should you carry out to make a 0.5 M solution of glucose?

Accepted Answer

A)   Dissolve 0.5 g of glucose in a small volume of water, and then add more water until the total volume of solution is 1 L.
B)   Dissolve 90 g of glucose in a small volume of water, and then add more water until the total volume of the solution is 1 L.
C)   Dissolve 180 g of glucose in a small volume of water, and then add more water until the total volume of the solution is 1 L.
D)   Dissolve 0.5 g of glucose in 1 L of water.
E)   Dissolve 180 g of glucose in 0.5 L of water.

Question 10

The molar mass of glucose is 180 g/mol. Which of the following procedures should you carry out to make a 1 M solution of glucose?

Accepted Answer

A)   Dissolve 1 g of glucose in 1 L of water.
B)   Dissolve 180 g of glucose in 1 L of water.
C)   Dissolve 180 g of glucose in 180 g of water.
D)   Dissolve 180 milligrams (mg)  of glucose in 1 L of water.
E)   Dissolve 180 g of glucose in 0.8 L of water, and then add more water until the total volume of the solution is 1 L.

Question 11

The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius?

Accepted Answer

A)   0.2°C
B)   1.0°C
C)   2.0°C
D)   10.0°C
E)   20.0°C

Question 12

What is the pH of a solution with a hydroxyl ion [OH⁻] concentration of 10⁻¹² ᴹ?

Accepted Answer

A)   pH 2
B)   pH 4
C)   pH 10
D)   pH 12
E)   pH 14

Question 13

How many molecules of glucose (C₆H₁₂O₆ molecular mass = 180 daltons) would be present in 90 grams of glucose?

Accepted Answer

A)   90 × 10²³
B)   (6.02/180)  × 10²³
C)   (6.02/90)  × 10²³
D)   (90 x 6.02)  × 10²³
E)   (90/180)  × 6.02 × 10²³

Question 14

One liter of a solution of pH 2 has how many more hydrogen ions (H⁺) than 1L of a solution of pH 6?

Accepted Answer

A)   4 times more
B)   16 times more
C)   40,000 times more
D)   10,000 times more
E)   100,000 times more

Question 15

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by

Accepted Answer

A)   hydrogen bonds.
B)   nonpolar covalent bonds.
C)   polar covalent bonds.
D)   ionic bonds.
E)   van der Waals interactions.

Question 16

A small birthday candle is weighed, then lighted and placed beneath a metal can containing 100 mL of water. Careful records are kept as the temperature of the water rises. Data from this experiment are shown on the graph. What amount of heat energy is released in the burning of candle wax?

Accepted Answer

A)   0.5 kilocalories per gram of wax burned
B)   5 kilocalories per gram of wax burned
C)   10 kilocalories per gram of wax burned
D)   20 kilocalories per gram of wax burned
E)   50 kilocalories per gram of wax burned

Question 17

The bonds that are broken when water vaporizes are

Accepted Answer

A)   ionic bonds.
B)   hydrogen bonds between water molecules.
C)   covalent bonds between atoms within water molecules.
D)   polar covalent bonds.
E)   nonpolar covalent bonds.

Question 18

Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

Accepted Answer

A)   10⁻¹⁰ M
B)   10⁻⁴ M
C)   10⁻⁷ M
D)   10⁻¹⁴ ᴹ
E)   10 M

Question 19

Water molecules are able to form hydrogen bonds with

Accepted Answer

A)   compounds that have polar covalent bonds.
B)   oils.
C)   oxygen gas (O₂)  molecules.
D)   chloride ions.
E)   any compound that is not soluble in water.

Question 20

You have a freshly prepared 1 M solution of glucose in water. You carefully pour out a 100 mL sample of that solution. How many glucose molecules are included in that 100 mL sample?

Accepted Answer

A)   6.02 × 10²³
B)   3.01 × 10²³
C)   6.02 × 10²⁴
D)   12.04 × 10²³
E)   6.02 × 10²²

Exam 3: Water and Life

You have a freshly prepared 1 M solution of glucose in water. You carefully pour out a 100 mL sample of that solution. How many glucose molecules are included in that 100 mL sample?

Correct Answer
verified

Water molecules are able to form hydrogen bonds with

Correct Answer
verified

-How many grams of the compound in the figure above would be required to make 1 L of a 0.5 M solution? (carbon = 12, oxygen = 16, hydrogen = 1)

Correct Answer
verified

A dietary Calorie equals 1 kilocalorie. Which of the following statements correctly defines 1 kilocalorie?

Correct Answer
verified

The molar mass of glucose is 180 g/mol. Which of the following procedures should you carry out to make a 1 M solution of glucose?

Correct Answer
verified

What is the pH of a solution with a hydroxyl ion [OH⁻] concentration of 10⁻¹² ᴹ?

Correct Answer
verified

The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius?

Correct Answer
verified

Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

Correct Answer
verified

The bonds that are broken when water vaporizes are

Correct Answer
verified

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by

Correct Answer
verified

Carbon dioxide (CO₂) is readily soluble in water, according to the equation CO₂ + H₂O ↔ H₂CO₃. Carbonic acid (H₂CO₃) is a weak acid. If CO₂ is bubbled into a beaker containing pure, freshly distilled water, which of the following graphs correctly describes the results?

Correct Answer
verified

Which of the following effects is produced by the high surface tension of water?

Correct Answer
verified

The molar mass of glucose (C₆H₁₂O₆) is 180 g/mol. Which of the following procedures should you carry out to make a 0.5 M solution of glucose?

Correct Answer
verified

How many molecules of glucose (C₆H₁₂O₆ molecular mass = 180 daltons) would be present in 90 grams of glucose?

Correct Answer
verified

One liter of a solution of pH 2 has how many more hydrogen ions (H⁺) than 1L of a solution of pH 6?

Correct Answer
verified

A small birthday candle is weighed, then lighted and placed beneath a metal can containing 100 mL of water. Careful records are kept as the temperature of the water rises. Data from this experiment are shown on the graph. What amount of heat energy is released in the burning of candle wax?

Correct Answer
verified

If the pH of a solution is decreased from 9 to 8, it means that the

Correct Answer
verified

Correct Answer
verified

A given solution contains 0.0001(10⁻⁴) moles of hydrogen ions [H⁺] per liter. Which of the following best describes this solution?

Correct Answer
verified

Which of the following takes place as an ice cube cools a drink?

Correct Answer
verified

Exam 3: Water and Life

You have a freshly prepared 1 M solution of glucose in water. You carefully pour out a 100 mL sample of that solution. How many glucose molecules are included in that 100 mL sample?

Correct AnswerverifiedShow Answer

Water molecules are able to form hydrogen bonds with

Correct AnswerverifiedShow Answer

-How many grams of the compound in the figure above would be required to make 1 L of a 0.5 M solution? (carbon = 12, oxygen = 16, hydrogen = 1)

Correct AnswerverifiedShow Answer

A dietary Calorie equals 1 kilocalorie. Which of the following statements correctly defines 1 kilocalorie?

Correct AnswerverifiedShow Answer

The molar mass of glucose is 180 g/mol. Which of the following procedures should you carry out to make a 1 M solution of glucose?

Correct AnswerverifiedShow Answer

What is the pH of a solution with a hydroxyl ion [OH⁻] concentration of 10⁻¹² ᴹ?

Correct AnswerverifiedShow Answer

The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius?

Correct AnswerverifiedShow Answer

Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

Correct AnswerverifiedShow Answer

The bonds that are broken when water vaporizes are

Correct AnswerverifiedShow Answer

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by

Correct AnswerverifiedShow Answer

Carbon dioxide (CO₂) is readily soluble in water, according to the equation CO₂ + H₂O ↔ H₂CO₃. Carbonic acid (H₂CO₃) is a weak acid. If CO₂ is bubbled into a beaker containing pure, freshly distilled water, which of the following graphs correctly describes the results?

Correct AnswerverifiedShow Answer

Which of the following effects is produced by the high surface tension of water?

Correct AnswerverifiedShow Answer

The molar mass of glucose (C₆H₁₂O₆) is 180 g/mol. Which of the following procedures should you carry out to make a 0.5 M solution of glucose?

Correct AnswerverifiedShow Answer

How many molecules of glucose (C₆H₁₂O₆ molecular mass = 180 daltons) would be present in 90 grams of glucose?

Correct AnswerverifiedShow Answer

One liter of a solution of pH 2 has how many more hydrogen ions (H⁺) than 1L of a solution of pH 6?

Correct AnswerverifiedShow Answer

A small birthday candle is weighed, then lighted and placed beneath a metal can containing 100 mL of water. Careful records are kept as the temperature of the water rises. Data from this experiment are shown on the graph. What amount of heat energy is released in the burning of candle wax?

Correct AnswerverifiedShow Answer

If the pH of a solution is decreased from 9 to 8, it means that the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A given solution contains 0.0001(10⁻⁴) moles of hydrogen ions [H⁺] per liter. Which of the following best describes this solution?

Correct AnswerverifiedShow Answer

Which of the following takes place as an ice cube cools a drink?

Correct AnswerverifiedShow Answer

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