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 68 °F. What is the temperature in Kelvin? Use the formulas: 
$$T_C = \frac{5}{9}(T_F - 32)$$
$$T_K = T_C + 273.15$$

Accepted Answer

$$T_K = 293.15$$

Question 3

Which prefix represents a factor of $$10^{-6}$$?

Accepted Answer

micro

Question 4

A cube of iron has a mass of 25 g. If the density of iron is $$7.9 \frac{g}{cm^3$}$$, what is the length of one side of the cube? (Volume of a cube: $$V = a^3$)

Accepted Answer

$$a = 2.0\ cm$$

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 the correct number of significant figures.

Accepted Answer

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

Question 7

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

18.3 m

Question 8

Which of the following is a derived SI unit?

Accepted Answer

joule (J)

Question 9

A sample of copper has a mass of 100 g and occupies a volume of 11.1 mL. What is its density?

Accepted Answer

$$9.0\ \frac{g}{cm^3$}$$

Question 10

Which of the following numbers has 4 significant figures?

Accepted Answer

2001

Question 11

A rock is placed in a graduated cylinder containing 100.0 mL of water. The water level rises to 125.0 mL. If the rock has a mass of 75.0 g, what is its density?

Accepted Answer

$$3.00\ \frac{g}{mL}$$

Question 12

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

Accepted Answer

$$6.000 	imes 10^6$\ s$$

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

A student measures the mass of a sample three times and gets values of 8.01 g, 8.03 g, and 8.02 g. The true mass is 8.50 g. Which statement best describes the measurements?

Accepted Answer

The measurements are precise but not accurate.

Question 16

Which of the following is the correct relationship between liters and milliliters?

Accepted Answer

1 L = 1000 mL

Question 17

Which of the following is NOT a base SI unit?

Accepted Answer

joule (J)

Question 18

A sample of gasoline has a density of $$0.75\ \frac{g}{cm^3$}. $$What is the mass of 400 mL of gasoline?

Accepted Answer

300 g

Question 19

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

Accepted Answer

$$T_F = \frac{9}{5}T_C + 32$$

Chapter 1: Chemical Tools – Experimentation & Measurement

Guida di studio - Domande di pratica

Study guide - Flashcard