Question 1

Which of the following best describes a scientific theory?

Accepted Answer

A model for the way nature is, explaining why nature behaves as it does, and validated by experiments.

Question 2

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Salt and sand mixture

Question 3

A student measures the mass of a sample as 5.230 g. How many significant figures are in this measurement?

Accepted Answer

4

Question 4

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 5

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

Accepted Answer

Decanting

Question 6

Convert 120.0 °F to Kelvin using the appropriate formulas.

Accepted Answer

$K = \frac{120.0 - 32}{1.8} + 273.15 = 322.04\ K$

Question 7

Which of the following is an extensive property?

Accepted Answer

Mass

Question 8

A compound is best described as:

Accepted Answer

A substance composed of two or more elements in fixed, definite proportions.

Question 9

Which of the following statements about energy is correct?

Accepted Answer

Kinetic energy is associated with the motion of an object.

Question 10

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

Accepted Answer

Rusting of iron

Question 11

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

$19.3\ \mathrm{g/cm^3}$

Question 12

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 13

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture that appears to be one substance with uniform composition throughout.

Question 14

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

Accepted Answer

Kelvin

Question 15

A student adds 12.34 g and 0.6 g. What is the correct answer with the proper number of significant figures?

Accepted Answer

$12.9\ \mathrm{g}$

Question 16

Which of the following is NOT a step in the scientific method?

Accepted Answer

Ignoring contradictory data

Question 17

Which of the following is true about the law of conservation of mass?

Accepted Answer

Matter is neither created nor destroyed in a chemical reaction.

Question 18

A block measures 7.36 cm long, 5.23 cm wide, and 1.2 cm thick. What is its volume in cubic centimeters?

Accepted Answer

$46\ \mathrm{cm^3}$

Question 19

Which of the following is a derived unit in the SI system?

Accepted Answer

Liter

Chapter 1: Matter, Measurements, and Problem Solving – General Chemistry Study Notes

Study Guide - Practice Questions