Q: A nurse prepares 2.00 L of an intravenous glucose solution with a density of $$1.15\ \mathrm{g/mL}. $$What is the mass of the solution in grams?

$$2.30 \times 10^3$\ \mathrm{g}$$

Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout, such as salt water.

Question 2

A nurse prepares 2.00 L of an intravenous glucose solution with a density of $$1.15\ \mathrm{g/mL}. $$What is the mass of the solution in grams?

Accepted Answer

$$2.30 	imes 10^3$\ \mathrm{g}$$

Question 3

Which of the following is an example of a chemical change?

Accepted Answer

Iron rusting when exposed to air.

Question 4

Mercury has a specific gravity of $$13.6. $$How many milliliters of mercury have a mass of $$0.35\ \mathrm{kg}$$?

Accepted Answer

$$25.7\ \mathrm{mL}$$

Question 5

A saline solution has a mass of $$24\ \mathrm{g}$$, of which $$2.8\ \mathrm{g} is $$sodium chloride. What percent of the solution is sodium chloride?

Accepted Answer

$$11.7\%$$

Question 6

Which of the following statements about energy is correct?

Accepted Answer

Kinetic energy is the energy of motion, while potential energy is stored energy.

Question 7

A 32.5 g cube of aluminum at $$45.8\ ^\circ\mathrm{C} is $$placed in $$105.3\ \mathrm{g} of $$water at $$15.4\ ^\circ\mathrm{C}. $$What is the final temperature at thermal equilibrium? (Specific heat of Al: $$0.903\ \mathrm{J/g\ ^\circ C}$$, water: $$4.18\ \mathrm{J/g\ ^\circ C})$$

Accepted Answer

$$17.0\ ^\circ\mathrm{C}$$

Question 8

Which of the following is a correct SI unit for energy?

Accepted Answer

$$\mathrm{J} ($$joule)

Question 9

A 55.0 g aluminum block initially at $$27.5\ ^\circ\mathrm{C}$$ absorbs $$725\ \mathrm{J} of $$heat. What is its final temperature? (Specific heat of Al: $$0.903\ \mathrm{J/g\ ^\circ C})$$

Accepted Answer

$$41.1\ ^\circ\mathrm{C}$$

Question 10

A collection of coins contains 9 nickels, 6 quarters, and 5 dimes. What is the percentage of dimes in the collection?

Accepted Answer

$$23\%$$

Question 11

Which of the following is a prefix multiplier and its correct value?

Accepted Answer

kilo-, $$10^3$$

Question 12

A chemistry student finds a $$4.7\ \mathrm{g}$$ gold-colored rock. Absorbing $$57.2\ \mathrm{J} of $$heat raises its temperature from $$25\ ^\circ\mathrm{C} to$$ $$57\ ^\circ\mathrm{C}. $$What is the specific heat capacity of the rock, and is it consistent with pure gold? (Gold: $$0.128\ \mathrm{J/g\ ^\circ C})$$

Accepted Answer

$$0.38\ \mathrm{J/g\ ^\circ C}$$; not consistent with gold

Question 13

Which of the following is an example of potential energy?

Accepted Answer

A stretched rubber band.

Question 14

What is the specific gravity of a solution with a density of $$1.18\ \mathrm{g/mL}$$?

Accepted Answer

$$1.18$$

Question 15

An alloy contains $$57\ \mathrm{g} of $$pure silver and $$23\ \mathrm{g} of $$pure copper. What is the percentage of silver in the alloy?

Accepted Answer

$$71\%$$

Question 16

Which of the following best describes a physical change?

Accepted Answer

Boiling water to produce steam.

Question 17

Suppose you find a penny (minted before 1982, pure copper, $$3.10\ \mathrm{g}) in $$the snow at $$-8.0\ ^\circ\mathrm{C}$$ and it warms to $$37.0\ ^\circ\mathrm{C}. $$How much heat is absorbed? (Copper: $$0.385\ \mathrm{J/g\ ^\circ C})$$

Accepted Answer

$$53.7\ \mathrm{J}$$

Question 18

Which of the following is NOT a pure substance?

Accepted Answer

Air

Question 19

A clinic had 30 patients on Friday morning. If 24 patients were given flu shots, what percentage of the patients received flu shots?

Accepted Answer

$$80\%$$

Question 20

Which of the following best describes the difference between solids, liquids, and gases?

Accepted Answer

Solids have definite shape and volume, liquids have definite volume but no definite shape, and gases have neither definite shape nor volume.

GOB Chemistry Exam 2 Study Guide – Step-by-Step Guidance

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