Question 1

The image shows a molecular model of oxygen. Based on the study materials, which statement best describes the substance shown?

Accepted Answer

It is an element because it contains only one type of atom.

Question 2

Given the molecular model of oxygen (O$$_2$$), which classification of matter does it belong to?

Accepted Answer

Element

Question 3

Which property of oxygen gas (O$$_2) is $$considered an intensive property?

Accepted Answer

Density

Question 4

If oxygen gas undergoes combustion, which type of change is occurring?

Accepted Answer

Chemical change

Question 5

Which separation technique would NOT be appropriate for isolating oxygen gas from a mixture of gases?

Accepted Answer

Filtration

Question 6

Oxygen gas (O$$_2) is $$best described as:

Accepted Answer

A molecule and an element

Question 7

Which statement about the oxygen molecule (O$$_2) is $$correct?

Accepted Answer

It is composed of two atoms of the same element.

Question 8

If you have a sample of pure oxygen gas, which of the following is true about its composition?

Accepted Answer

It is invariant and consists only of O$$_2$$ molecules.

Question 9

Which of the following best explains why oxygen gas (O$$_2) is $$classified as a pure substance?

Accepted Answer

It contains only one type of molecule throughout.

Question 10

Which of the following statements about the physical state of oxygen at room temperature is correct?

Accepted Answer

Oxygen is a gas at room temperature.

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

Study Guide - Practice Questions