Q: Convert 132.3 °F to Celsius using the correct formula.

$$C = (F-32) \times \frac{5}{9}$$; $$C = (132.3-32) \times \frac{5}{9} = 55.72^\circ C$$

Q: A sample of wood has a mass of 45.2 lbs. What is its mass in milligrams? (1 kg = 2.205 lbs)

$$2.05 \times 10^7$\ \mathrm{mg}$$

Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Question 1

Which of the following statements best describes an intensive property?

Accepted Answer

It does not depend on the amount of matter present in the substance.

Question 2

A sample of mercury has a mass of 100.0 g and a density of 13.54 g/mL. What is its volume in liters?

Accepted Answer

$$0.007386\ \mathrm{L}$$

Question 3

Which of the following is a chemical change?

Accepted Answer

Hydrogen reacting with oxygen to form water

Question 4

Which of the following is a homogeneous mixture?

Accepted Answer

Salt water

Question 5

A piece of wood has a mass of 457.2 g and a volume of 82.03 cm$$^3. $$What is its density?

Accepted Answer

$$5.574\ \mathrm{g/cm^3$}$$

Question 6

Which of the following is NOT a base unit in the SI system?

Accepted Answer

Gram

Question 7

Convert 132.3 °F to Celsius using the correct formula.

Accepted Answer

$$C = (F-32) 	imes \frac{5}{9}$$; $$C = (132.3-32) 	imes \frac{5}{9} = 55.72^\circ C$$

Question 8

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 9

A compound is defined as:

Accepted Answer

A substance composed of atoms of two or more elements chemically combined in a fixed proportion.

Question 10

Which of the following best describes a gas?

Accepted Answer

Matter without definite volume or shape and can flow.

Question 11

A bottle contains 40 pills, each with 200 mg of active ingredient. How many grams of active ingredient are in the bottle?

Accepted Answer

$$8.0\ \mathrm{g}$$

Question 12

Which of the following numbers has 4 significant figures?

Accepted Answer

55020

Question 13

Which of the following is the correct scientific notation for 0.0000568?

Accepted Answer

$$5.68 	imes 10$$^{-5}$$

Question 14

A student measures the mass of an object four times and gets: 138.1 g, 138.0 g, 138.2 g, and 138.0 g. The true mass is 138.0 g. These measurements are:

Accepted Answer

Accurate and precise

Question 15

Which of the following is a physical change?

Accepted Answer

Salt dissolving in water

Question 16

Which of the following is a heterogeneous mixture?

Accepted Answer

Concrete mix

Question 17

Which of the following is an exact number?

Accepted Answer

12 eggs in a dozen

Question 18

Which formula is used to convert Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273$$

Question 19

A sample of wood has a mass of 45.2 lbs. What is its mass in milligrams? (1 kg = 2.205 lbs)

Accepted Answer

$$2.05 	imes 10^7$\ \mathrm{mg}$$

Question 20

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Chapter 1: Matter & Measurement – General Chemistry Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드