Q: A cube of iron has a mass of 25 g and a density of 7.9 g/cm$$^3. $$What is the length of one side of the cube?

$$V = \frac{25}{7.9} = 3.16\ \text{cm}^3$$, so\ l = \sqrt[3]{3.16} = 1.47\ \text{cm}$

Q: Convert 0.00300 mL to liters using scientific notation and correct significant figures.

$$3.00 \times 10$$^{-6}$$\ \text{L}$$

Q: A rock is placed in a graduated cylinder containing 100.0 mL of water. The water level rises to 135.0 mL. If the rock's mass is 120 g, what is its density?

$$\text{Density} = \frac{120\ \text{g}}{35.0\ \text{mL}} = 3.43\ \text{g/mL}$$

Q: Which of the following is the correct derived SI unit for pressure?

$$\text{kg} \cdot \text{m}^{-1} \cdot \text{s}^{-2} ($$pascal, Pa)

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

$$\frac{2.205\ \text{lb}}{1\ \text{kg}}$$

Q: A swimmer swims 85.4 yards in five minutes. How many meters will they swim in 70.0 seconds? (1 yard = 0.9144 m)

$$\frac{85.4\ \text{yd}}{300\ \text{s}} \times 70.0\ \text{s} \times 0.9144\ \text{m/yd} = 18.3\ \text{m}$$

Q: A sample of gold has a mass of 38.6 g and a density of 19.3 g/cm$$^3. $$What is its volume?

$$V = \frac{38.6}{19.3} = 2.00\ \text{cm}^3$$

Q: Which of the following is the correct scientific notation for 6,000,000 s with 4 significant figures?

$$6.000 \times 10^6$\ \text{s}$$

Question 1

Which of the following is the correct SI base unit for measuring the amount of substance?

Accepted Answer

mole (mol)

Question 2

A laboratory thermometer reads 25 $$^\circC. $$What is this temperature in Kelvin?

Accepted Answer

$$T_K = 25 + 273.15 = 298.15$$

Question 3

Which prefix and symbol correctly represent a factor of $$10^{-6}$$?

Accepted Answer

micro ($$\mu)$$

Question 4

A cube of iron has a mass of 25 g and a density of 7.9 g/cm$$^3. $$What is the length of one side of the cube?

Accepted Answer

$$V = \frac{25}{7.9} = 3.16\ 	ext{cm}^3$$, so\ l = \sqrt[3]{3.16} = 1.47\ 	ext{cm}$

Question 5

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 6

Convert 0.00300 mL to liters using scientific notation and correct significant figures.

Accepted Answer

$$3.00 	imes 10$$^{-6}$$\ 	ext{L}$$

Question 7

A rock is placed in a graduated cylinder containing 100.0 mL of water. The water level rises to 135.0 mL. If the rock's mass is 120 g, what is its density?

Accepted Answer

$$	ext{Density} = \frac{120\ 	ext{g}}{35.0\ 	ext{mL}} = 3.43\ 	ext{g/mL}$$

Question 8

Which of the following is the correct derived SI unit for pressure?

Accepted Answer

$$	ext{kg} \cdot 	ext{m}^{-1} \cdot 	ext{s}^{-2} ($$pascal, Pa)

Question 9

A student measures the mass of a sample as 76,600 g. How many significant figures does this measurement have?

Accepted Answer

3

Question 10

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

Accepted Answer

$$\frac{2.205\ 	ext{lb}}{1\ 	ext{kg}}$$

Question 11

A swimmer swims 85.4 yards in five minutes. How many meters will they swim in 70.0 seconds? (1 yard = 0.9144 m)

Accepted Answer

$$\frac{85.4\ 	ext{yd}}{300\ 	ext{s}} 	imes 70.0\ 	ext{s} 	imes 0.9144\ 	ext{m/yd} = 18.3\ 	ext{m}$$

Question 12

Which of the following is the correct formula for kinetic energy?

Accepted Answer

$$E_K = \frac{1}{2}mv^2$

Question 13

Which of the following numbers has 4 significant figures?

Accepted Answer

0.00300

Question 14

A sample of gold has a mass of 38.6 g and a density of 19.3 g/cm$$^3. $$What is its volume?

Accepted Answer

$$V = \frac{38.6}{19.3} = 2.00\ 	ext{cm}^3$$

Question 15

Which of the following is the correct relationship between liters and cubic decimeters?

Accepted Answer

1 L = 1 dm$$^3$$

Question 16

Which of the following is the correct scientific notation for 6,000,000 s with 4 significant figures?

Accepted Answer

$$6.000 	imes 10^6$\ 	ext{s}$$

Question 17

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

Accepted Answer

joule (J)

Question 18

A student adds 1700 L and 150 L. According to significant figure rules, what is the correct answer?

Accepted Answer

1900 L

Chapter 1 study notes

Guida di studio - Domande di pratica

Study guide - Flashcard