Question 1

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

Accepted Answer

$3.45 	imes 10^4$

Question 2

Convert $0.00056$ to scientific notation.

Accepted Answer

$5.6 	imes 10^{-4}$

Question 3

How many significant figures are in the measurement $0.02030$?

Accepted Answer

4

Question 4

When multiplying $2.34$ (3 sig figs) by $0.010$ (2 sig figs), how many significant figures should the answer have?

Accepted Answer

2

Question 5

A student adds $12.11$ g, $0.034$ g, and $1.2$ g. What is the sum, rounded to the correct number of decimal places?

Accepted Answer

$13.3$ g

Question 6

Which of the following is the correct metric prefix for $10^{-3}$?

Accepted Answer

milli-

Question 7

Convert $5.0$ inches to centimeters. (1 inch = 2.54 cm)

Accepted Answer

$12.7$ cm

Question 8

A sample has a mass of $250$ g and a volume of $200$ mL. What is its density?

Accepted Answer

$1.25$ 	ext{ g/mL}$

Question 9

If a block of metal has a density of $8.96$ 	ext{ g/cm}^3$ and a mass of $45.0$ g, what is its volume?

Accepted Answer

$5.02$ 	ext{ cm}^3$

Question 10

A graduated cylinder contains $25.0$ mL of water. After a metal object is submerged, the water rises to $32.5$ mL. If the mass of the object is $60.0$ g, what is its density?

Accepted Answer

$8.0$ 	ext{ g/mL}$

Question 11

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

Accepted Answer

kilogram

Question 12

Convert $3.5$ feet to meters. (1 foot = 12 inches, 1 inch = 2.54 cm, 100 cm = 1 m)

Accepted Answer

$1.07$ m

Question 13

Which of the following measurements is expressed to three significant figures?

Accepted Answer

$0.0400$ g

Question 14

A student records a measurement as $0.020$ L. How many significant figures does this value have?

Accepted Answer

3

Question 15

Which of the following is the correct way to round $3.4567$ to three significant figures?

Accepted Answer

$3.46$

Question 16

If the density of a liquid is $0.789$ 	ext{ g/mL}$, what is the mass of $250$ mL of this liquid?

Accepted Answer

$197$ g

Question 17

Which of the following is NOT an SI base unit?

Accepted Answer

liter

Question 18

A student measures the length of a table as $1.245$ m and the width as $0.65$ m. What is the area, rounded to the correct number of significant figures?

Accepted Answer

$0.81$ 	ext{ m}^2$

Question 19

Which of the following conversions is correct?

Accepted Answer

$1$ yard $= 3$ feet

Question 20

A student needs to convert $250$ mL to liters. What is the correct answer?

Accepted Answer

$0.250$ L

Introduction to Chemistry: Test Preparation Study Guide

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