$$250\ \text{mL} \times \frac{1\ \text{L}}{1000\ \text{mL}} = 0.250\ \text{L}$$

$$5\ \text{mg} \times 70 = 350\ \text{mg}$$

$$\frac{5}{100} \times 100\% = 5\%$$

$$^\circ F = (^\circ C \times 1.8) + 32$$

Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is the same throughout

Question 2

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

Accepted Answer

Melting ice to form liquid water

Question 3

A sample of table salt (NaCl) is best classified as:

Accepted Answer

A compound

Question 4

Which of the following statements about the periodic table is correct?

Accepted Answer

Groups are vertical columns and periods are horizontal rows

Question 5

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

Accepted Answer

$$d = \frac{m}{V}$$

Question 6

A patient’s body temperature is measured at 39.0 $$^\circC. $$What is this temperature in Kelvin?

Accepted Answer

$$K = 39.0 + 273 = 312.0\ K$$

Question 7

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

Accepted Answer

Iron

Question 8

How many significant figures are in the measurement 0.00450 g?

Accepted Answer

3

Question 9

Which of the following best describes the law of conservation of mass?

Accepted Answer

Mass is neither created nor destroyed in a chemical reaction

Question 10

Convert 250 milliliters (mL) to liters (L) using the correct conversion factor.

Accepted Answer

$$250\ 	ext{mL} 	imes \frac{1\ 	ext{L}}{1000\ 	ext{mL}} = 0.250\ 	ext{L}$$

Question 11

A medication is prescribed at 5 mg/kg for a patient weighing 70 kg. What is the total dose required?

Accepted Answer

$$5\ 	ext{mg} 	imes 70 = 350\ 	ext{mg}$$

Question 12

Which of the following is the correct scientific notation for 0.00056?

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 13

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 14

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

Accepted Answer

Fills the volume of its container

Question 15

A solution contains 5 g of NaCl dissolved in 100 mL of water. What is the percent (w/v) concentration of NaCl?

Accepted Answer

$$\frac{5}{100} 	imes 100\% = 5\%$$

Question 16

Which of the following is the correct relationship for converting Celsius to Fahrenheit?

Accepted Answer

$$^\circ F = (^\circ C 	imes 1.8) + 32$$

Question 17

Which of the following is an example of a compound?

Accepted Answer

Water ($$H_2O)$$

Question 18

A sample of aluminum has a mass of 54.0 g and a volume of 20.0 mL. What is its density?

Accepted Answer

$$d = \frac{54.0\ 	ext{g}}{20.0\ 	ext{mL}} = 2.70\ 	ext{g/mL}$$

Question 19

Which of the following is the correct definition of specific heat?

Accepted Answer

The amount of heat needed to raise the temperature of 1 gram of a substance by 1 $$^\circC$$

Chapter 1 Study Guide – Chemistry Basics: Matter and Measurement

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