Question 1

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$4.56 	imes 10^7$

Question 2

Convert $0.000549$ g to scientific notation.

Accepted Answer

$5.49 	imes 10^{-4}$\ g

Question 3

How many significant figures are in the measurement $1.000$ mL?

Accepted Answer

4

Question 4

A student measures the mass of a rock as $28.4$ g and its volume as $5.10$ cm$^3$. What is the density of the rock, reported with the correct number of significant figures?

Accepted Answer

$5.57$\ g/cm^3$

Question 5

Which of the following statements about significant digits is TRUE?

Accepted Answer

Zeros after a decimal point and after a significant digit are significant.

Question 6

Round $0.004791$ L to two significant figures.

Accepted Answer

$0.0048$\ L

Question 7

A sample of aluminum has a mass of $22.5$ g and a volume of $8.29$ cm$^3$. What is its density, reported with the correct number of significant figures?

Accepted Answer

$2.71$\ g/cm^3$

Question 8

Which of the following is NOT a correct metric prefix and its meaning?

Accepted Answer

mega-: $10^{-6}$

Question 9

A block of wood has a density of $0.85$ g/cm$^3$. Will it float or sink in water (density $1.00$ g/cm$^3$)?

Accepted Answer

It will float because its density is less than water.

Question 10

Which of the following conversions is correct for $0.45$ g to mg?

Accepted Answer

$450$\ mg

Question 11

A chemist needs to convert $6.00$ in to cm. Using the conversion factor $2.54$ cm $= 1$ in, what is the correct answer with proper significant figures?

Accepted Answer

$15.2$\ cm

Question 12

When multiplying $2.38$ g by $0.12$ cm$^3$, how many significant figures should the answer have?

Accepted Answer

2

Question 13

Which of the following is an example of a measurement with infinite significant figures?

Accepted Answer

The number of students in a classroom

Question 14

A sample of iron has a mass of $185$ g and a density of $7.86$ g/cm$^3$. What is its volume, reported with the correct number of significant figures?

Accepted Answer

$23.5$\ cm^3$

Question 15

Which of the following is the correct way to convert $533$ cm to meters?

Accepted Answer

$533 \div 100 = 5.33$\ m

Question 16

A utility box has a volume of $1.5$ ft$^3$. How many cubic inches is this? ($1$ ft $= 12$ in)

Accepted Answer

$2592$\ in^3$

Question 17

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object; weight is the force of gravity on that mass.

Question 18

A student adds $503.9$ mL and $200$ mL. How many decimal places should the answer have?

Accepted Answer

0 decimal places

Question 19

Which of the following is the correct result for $4.184$ cm $	imes$ $2.11$ cm, reported with the correct number of significant figures?

Accepted Answer

$8.83$\ cm^2$

Chapter 2: Measurements in Chemistry – Scientific Notation, Significant Figures, and Unit Conversions

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