Q: A patient is prescribed 325 mg of aspirin. How many grams of aspirin is this?

$$325 \times \frac{1\ g}{1000\ mg} = 0.325\ g$$

Q: Convert 1.0 pint to liters using the following conversion factors: $$2\ \text{pt} = 1\ \text{qt}$$ and $$1.06\ \text{qt} = 1\ \text{L}.$$

$$1.0\ \text{pt} \times \frac{1\ \text{qt}}{2\ \text{pt}} \times \frac{1\ \text{L}}{1.06\ \text{qt}} = 0.47\ \text{L}$$

Q: A sample of acetic acid has a mass of 5.0 g and a density of 1.05 g/mL. What is its volume in mL?

$$5.0\ \text{g} \times \frac{1\ \text{mL}}{1.05\ \text{g}} = 4.8\ \text{mL}$$

Q: What is the correct formula for density?

$$\text{density} = \frac{\text{mass (g)}}{\text{volume (mL)}}$$

Q: Which of the following is the correct conversion factor to convert pounds to kilograms?

$$1\ \text{kg} = 2.21\ \text{lb}$$

Q: What is the correct formula to convert Celsius to Fahrenheit?

$$\text{F} = 1.8 \times \text{C} + 32$$

Question 1

Which of the following statements best describes the difference between mass and weight?

Accepted Answer

Mass is a measure of the amount of matter in an object, while weight is the force that matter feels due to gravity.

Question 2

A patient is prescribed 325 mg of aspirin. How many grams of aspirin is this?

Accepted Answer

$$325 	imes \frac{1\ g}{1000\ mg} = 0.325\ g$$

Question 3

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

Accepted Answer

Melting ice to form liquid water.

Question 4

What is the correct number of significant figures in the measurement 0.00245 mg?

Accepted Answer

3

Question 5

Convert 1.0 pint to liters using the following conversion factors: $$2\ 	ext{pt} = 1\ 	ext{qt}$$ and $$1.06\ 	ext{qt} = 1\ 	ext{L}.$$

Accepted Answer

$$1.0\ 	ext{pt} 	imes \frac{1\ 	ext{qt}}{2\ 	ext{pt}} 	imes \frac{1\ 	ext{L}}{1.06\ 	ext{qt}} = 0.47\ 	ext{L}$$

Question 6

Which metric prefix represents one billionth ($$10^{-9}$$)?

Accepted Answer

Nano ($$n)$$

Question 7

A sample of acetic acid has a mass of 5.0 g and a density of 1.05 g/mL. What is its volume in mL?

Accepted Answer

$$5.0\ 	ext{g} 	imes \frac{1\ 	ext{mL}}{1.05\ 	ext{g}} = 4.8\ 	ext{mL}$$

Question 8

Which of the following is a pure substance?

Accepted Answer

Table salt ($$	ext{NaCl})$$

Question 9

What is the scientific notation for 0.000001?

Accepted Answer

$$1 	imes 10$$^{-6}$$

Question 10

Which of the following best describes a chemical change?

Accepted Answer

Hydrogen and oxygen reacting to form water.

Question 11

A measurement is recorded as 255.345 g. How many significant figures does it have?

Accepted Answer

6

Question 12

Which of the following is NOT a physical property?

Accepted Answer

Ability to react with acid

Question 13

What is the correct formula for density?

Accepted Answer

$$	ext{density} = \frac{	ext{mass (g)}}{	ext{volume (mL)}}$$

Question 14

Which of the following is an exact number?

Accepted Answer

1 meter = 100 centimeters

Question 15

What is the freezing point of water in Kelvin?

Accepted Answer

$$273\ 	ext{K}$$

Question 16

Which of the following is the correct conversion factor to convert pounds to kilograms?

Accepted Answer

$$1\ 	ext{kg} = 2.21\ 	ext{lb}$$

Question 17

A measurement is recorded as 3.7500 cm. How many significant figures does it have?

Accepted Answer

5

Question 18

Which of the following is a mixture?

Accepted Answer

Sugar dissolved in water

Question 19

What is the correct formula to convert Celsius to Fahrenheit?

Accepted Answer

$$	ext{F} = 1.8 	imes 	ext{C} + 32$$

Chapter 1: Matter and Measurement – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard