Chemistry 121 - Exam I Review

Question 1

Chemistry is the study of...

Accepted Answer

Matter

Question 2

How many significant figures are in 4.1730

Accepted Answer

None of the Above

Question 3

Which of the following is a compound and not a mixture?

Accepted Answer

CO2

Question 4

Which of the following is an NOT an example amorphous solid?

Accepted Answer

Table Salt

Question 5

Which of the following is a chemical change?

Accepted Answer

Burning Wood

Question 6

The two categories of classifying matter are: chemical composition and physical states

Accepted Answer

True

Question 7

Sharing electrons between 2 or more non-metals is...

Accepted Answer

Covalent bonding

Question 8

Air is a heterogeneous mixture.

Accepted Answer

False

Question 9

Which of the following is not a compound?

Accepted Answer

Ne

Question 10

Gases shape and volume are variable.

Accepted Answer

True

Question 11

Which of the following pairs of compounds is an example of the Law of Multiple Proportions?

Accepted Answer

Water (H₂O) and hydrogen peroxide (H₂O₂)

Question 12

Which element have properties that are intermediate between metals and non-metals?

Accepted Answer

Arsenic

Question 13

What is the element has the symbol B?

Accepted Answer

Boron

Question 14

Changes in physical states are reversible.

Accepted Answer

True

Question 15

Who discovered the proton?

Accepted Answer

Ernest Rutherford

Question 16

How many significant figures are in 0.00128

Accepted Answer

3

Question 17

When you go from a solid to a gas this is called...

Accepted Answer

Sublimation

Question 18

Which of the following elements are halogens?

Accepted Answer

F, Cl, Br, I

Questions 18