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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