$$\displaystyle \frac{\text{part}}{\text{whole}} \times 100$$

$$1 \ \mathrm{mL} = 1 \times 10$$^{-3}$$ \ \mathrm{L}$$

Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout, such as air or saltwater.

Question 2

Which of the following is a correct example of a compound?

Accepted Answer

Table salt (NaCl)

Question 3

Which statement about the periodic table is TRUE?

Accepted Answer

Groups are vertical columns and periods are horizontal rows.

Question 4

Which of the following is a physical change?

Accepted Answer

Melting ice to form liquid water.

Question 5

Balance the following chemical equation: $$\mathrm{C_3H_8 + O_2$ \rightarrow CO_2$ + H_2O}$$

Accepted Answer

$$\mathrm{C_3H_8 + 5 O_2$ \rightarrow 3 CO_2$ + 4 H_2O}$$

Question 6

A patient is prescribed 7.5 mg/kg acetaminophen. If the patient weighs 66 lbs, how many mg should be given per dose? (1 kg = 2.2 lbs)

Accepted Answer

225.0 mg

Question 7

Which of the following numbers has three significant figures?

Accepted Answer

1.03

Question 8

Convert 0.025 L to microliters ($$\muL).$$

Accepted Answer

25,000 $$\muL$$

Question 9

A 25 mL sample of urine has a specific gravity of 1.020. What is its mass in grams?

Accepted Answer

25.5 g

Question 10

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

Question 11

Which of the following is the correct scientific notation for 0.00045?

Accepted Answer

$$4.5 	imes 10$$^{-4}$$

Question 12

A brick has a mass of 1100 g and a volume of 85 mL. What is its density?

Accepted Answer

$$12.9 \ \mathrm{g/mL}$$

Question 13

Convert 37 $$^\circC ($$normal body temperature) to Fahrenheit.

Accepted Answer

$$98.6^\circF$$

Question 14

Which of the following is a property of gases but not solids or liquids?

Accepted Answer

Particles are far apart and move rapidly

Question 15

A nurse needs to deliver 1.0 L of IV fluid with a drop factor of 60 gtt/mL at a rate of 100 gtt/min. How many hours will it take?

Accepted Answer

10 hours

Question 16

Which of the following is a micronutrient essential for human health?

Accepted Answer

Iron

Question 17

Which of the following is the correct formula for calculating percent?

Accepted Answer

$$\displaystyle \frac{	ext{part}}{	ext{whole}} 	imes 100$$

Question 18

Which of the following is a correct conversion factor for milliliters to liters?

Accepted Answer

$$1 \ \mathrm{mL} = 1 	imes 10$$^{-3}$$ \ \mathrm{L}$$

Question 19

Which of the following best describes a chemical change?

Accepted Answer

Burning wood to produce ash and gases.

Chapter 1: Chemistry Basics—Matter and Measurement (GOB Chemistry Study Notes)

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