$$1\ \text{in} = 2.54\ \text{cm}$$

Question 1

Which of the following best describes a chemical reaction as seen in everyday life?

Accepted Answer

Burning a candle

Question 2

Which of the following is a pure substance?

Accepted Answer

Aluminum foil

Question 3

Which of the following is the correct symbol for the element argon?

Accepted Answer

$$Ar$$

Question 4

A mixture that has a uniform composition throughout is called:

Accepted Answer

A homogeneous mixture

Question 5

Which of the following is an example of a compound?

Accepted Answer

Table salt ($$NaCl)$$

Question 6

Which of the following is NOT a physical method of separating mixtures?

Accepted Answer

Electrolysis

Question 7

Which of the following is a correct statement about elements?

Accepted Answer

Elements are pure substances that cannot be broken down by chemical means.

Question 8

Which of the following is the correct conversion for inches to centimeters?

Accepted Answer

$$1\ 	ext{in} = 2.54\ 	ext{cm}$$

Question 9

Which of the following is a measured number?

Accepted Answer

A can of soda contains 355 mL of liquid.

Question 10

Which of the following is the correct scientific notation for 0.00082?

Accepted Answer

$$8.2 	imes 10$$^{-4}$$

Question 11

How many significant figures are in the measurement 0.0205 mL?

Accepted Answer

3

Question 12

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

Accepted Answer

Salt water

Question 13

Which of the following is the correct SI unit for mass?

Accepted Answer

Kilogram ($$kg)$$

Question 14

Which of the following is an exact number?

Accepted Answer

There are 5 cats on the shelf

Question 15

Which of the following is the best definition of chemistry?

Accepted Answer

The study of the composition, structure, properties, and reactions of substances

Question 16

Which of the following is a correct example of an element symbol from its Latin name?

Accepted Answer

Cu for copper

Question 17

Which of the following is the correct way to write the symbol for sodium?

Accepted Answer

$$Na$$

Question 18

Which of the following is a compound formula?

Accepted Answer

$$NaCl$$

Question 19

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

Accepted Answer

Kelvin ($$K)$$

Question 20

Which of the following is a heterogeneous mixture?

Accepted Answer

Chicken salad

Introduction to Chemistry: Matter, Measurement, and Scientific Method

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