Question 1

Which of the following best describes the difference between a water molecule and a hydrogen peroxide molecule, as shown in the images?

Accepted Answer

Water contains two hydrogen atoms and one oxygen atom, while hydrogen peroxide contains two hydrogen atoms and two oxygen atoms.

Question 2

Which step in the scientific method involves a tentative explanation that can be tested and potentially proven false?

Accepted Answer

Hypothesis

Question 3

A diamond is an example of which type of solid?

Accepted Answer

Crystalline solid

Question 4

Which of the following statements about gases is correct?

Accepted Answer

Gases assume the volume and shape of their container.

Question 5

A sample of matter is uniform throughout and can be separated into simpler substances by chemical means. How should it be classified?

Accepted Answer

Compound

Question 6

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 7

When iron rusts, forming iron oxide, what type of change is occurring?

Accepted Answer

Chemical change

Question 8

Which of the following best describes the Law of Conservation of Mass?

Accepted Answer

Mass is neither created nor destroyed in a chemical reaction.

Question 9

A platinum ring has a mass of 3.63 g and displaces 0.262 cm$$^3 of $$water. The density of platinum is 21.4 g/cm$$^3. Is $$the ring made of platinum? (Use $$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}})$$

Accepted Answer

Yes, because the calculated density matches platinum's density.

Question 10

Which of the following numbers has three significant figures?

Accepted Answer

0.0015

Question 11

Which of the following is an example of kinetic energy?

Accepted Answer

A moving car

Question 12

A student measures the mass of a sample four times and gets values that are very close to each other but far from the true value. This student's measurements are:

Accepted Answer

Precise but not accurate

Question 13

Which of the following is an exact number?

Accepted Answer

The number of eggs in a dozen

Question 14

A student records the volume of a liquid in a graduated cylinder as 4.36 mL. Which digit is estimated?

Accepted Answer

6

Question 15

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture with uniform composition throughout

Question 16

Which of the following is a derived unit?

Accepted Answer

Liter (L)

Question 17

A sample of gas is compressed from 2.0 L to 1.0 L. What happens to the arrangement of the gas particles?

Accepted Answer

They become more closely packed but still move freely.

Question 18

Which of the following is a physical change?

Accepted Answer

Boiling water

Question 19

Which prefix multiplier would you use to express 0.000001 seconds?

Accepted Answer

Micro-

Question 20

A student calculates the density of a liquid as $$\frac{8.50\ 	ext{g}}{10.0\ 	ext{mL}}. $$How many significant figures should the answer have?

Accepted Answer

3

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

Guida di studio - Domande di pratica

Study guide - Flashcard