$\text{Density} = \frac{96.5\ g}{5.00\ cm^3} = 19.3\ g/cm^3$

$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$

Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically combined in fixed proportions.

Question 2

Which separation technique would be most appropriate to separate a mixture of sand and salt water?

Accepted Answer

Filtration

Question 3

Which of the following is an example of a chemical property?

Accepted Answer

Flammability

Question 4

A student measures the mass of a sample as 12.345 g. How many significant figures does this measurement have?

Accepted Answer

5

Question 5

Which of the following is an extensive property?

Accepted Answer

Volume

Question 6

Convert 25.0 °C to Kelvin using the correct formula.

Accepted Answer

$K = ^\circ C + 273.15 = 25.0 + 273.15 = 298.15\ K$

Question 7

Which of the following best describes a heterogeneous mixture?

Accepted Answer

A mixture in which the composition is not uniform throughout.

Question 8

Which of the following is a physical change?

Accepted Answer

Melting of ice

Question 9

A sample of gold has a mass of 96.5 g and a volume of 5.00 cm$^3$. What is the density of gold?

Accepted Answer

$	ext{Density} = \frac{96.5\ g}{5.00\ cm^3} = 19.3\ g/cm^3$

Question 10

Which of the following statements about energy is correct?

Accepted Answer

Potential energy is stored energy due to position or composition.

Question 11

Which of the following is the correct SI unit for measuring temperature?

Accepted Answer

Kelvin

Question 12

Which of the following best describes the difference between precision and accuracy?

Accepted Answer

Precision refers to the reproducibility of measurements, while accuracy refers to how close a measurement is to the true value.

Question 13

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

Accepted Answer

Density

Question 14

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

Accepted Answer

$5.6 	imes 10^{-4}$

Question 15

A student needs to convert 250 mL to liters. Which conversion factor should be used?

Accepted Answer

$1\ L = 1000\ mL$

Question 16

Which of the following best describes chromatography?

Accepted Answer

A technique used to separate mixtures based on differences in the ability of substances to adhere to the surface of solids.

Question 17

Which of the following is a correct statement about elements?

Accepted Answer

Elements are substances that cannot be decomposed into simpler substances by chemical means.

Question 18

Which of the following is the correct formula for density?

Accepted Answer

$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}}$

Question 19

Which of the following is a chemical change?

Accepted Answer

Burning of wood

Question 20

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

Accepted Answer

Joule

Chapter 1: Introduction—Matter, Energy, and Measurement (General Chemistry Study Notes)

Study Guide - Practice Questions