Question 1

Which of the following statements best describes a scientific theory?

Accepted Answer

A theory is a model for the way nature behaves, supported by extensive evidence.

Question 2

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

Accepted Answer

Iron rusting when exposed to oxygen.

Question 3

A sample contains only blue circles, each representing a single type of atom. How should this sample be classified?

Accepted Answer

Element

Question 4

Which property is intensive?

Accepted Answer

Melting point

Question 5

A block of copper has a mass of 143.584 g and measures 5.05 cm by 2.55 cm by 1.25 cm. What is its density in $\mathrm{g/cm^3}$?

Accepted Answer

$8.92\ \mathrm{g/cm^3}$

Question 6

Which of the following is a homogeneous mixture?

Accepted Answer

Brass

Question 7

Convert 25 lbs to grams. (Use $1\ \mathrm{lb} = 456.6\ \mathrm{g}$)

Accepted Answer

$11,415\ \mathrm{g}$

Question 8

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom.

Question 9

How many significant figures are in the measurement 0.000995 s?

Accepted Answer

4

Question 10

Which separation technique would be most appropriate for separating sand from salt water?

Accepted Answer

Filtration

Question 11

A sample of ethyl alcohol has a mass of 35.5 g and a density of $0.789\ \mathrm{g/mL}$. What is its volume in mL?

Accepted Answer

$45.0\ \mathrm{mL}$

Question 12

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 13

What is the volume in cubic inches of a bronze solid with a volume of $25.5\ \mathrm{cm^3}$? (Use $1\ \mathrm{inch} = 2.54\ \mathrm{cm}$)

Accepted Answer

$10.0\ \mathrm{inch^3}$

Question 14

Which of the following is NOT a base SI unit?

Accepted Answer

Gram

Question 15

Which statement about accuracy and precision is correct?

Accepted Answer

Accuracy refers to how close a measurement is to the true value, while precision refers to how close measurements are to each other.

Question 16

Which of the following is a chemical property?

Accepted Answer

Reactivity with acid

Question 17

How many significant figures are in the measurement 1.45000 km?

Accepted Answer

6

Question 18

Which of the following is a derived unit?

Accepted Answer

Liter

Question 19

A student measures the mass of a sample as 20.45 g and the volume as 5.00 mL. What is the density of the sample?

Accepted Answer

$4.09\ \mathrm{g/mL}$

Question 20

Which of the following is a heterogeneous mixture?

Accepted Answer

Granite

Chapter 1: Matter, Measurement, and Problem Solving – Study Notes

Study Guide - Practice Questions