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Chemistry Fundamentals: Ch. 2 Worksheet - Notation, Figures, Conversion, and Density, Assignments of Chemistry

A worksheet from chapter 2 of a fundamentals of chemistry textbook. It includes exercises on scientific notation, significant figures, unit conversion, and density. Students are asked to perform calculations and express their answers using the appropriate number of significant figures.

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Pre 2010

Uploaded on 08/19/2009

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Ch 100: Fundamentals for Chemistry
Chapter 2: Worksheet
Scientific Notation:
Express the following numbers in scientific notation:
a) 543
b) 20,000,000
c) 12,000.0
d) 0.0000230
e) 0.0012
Significant Figures:
Determine the number of significant figures for each of the following measurements:
a) 2.303 meters
b) 5.50 seconds
c) 0.024 liters
d) 24.3 kilograms
e) 115.20 centimeters
f) 100 miles/hour
pf3
pf4

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Chapter 2: Worksheet

Scientific Notation:

Express the following numbers in scientific notation:

a) 543

b) 20,000,

c) 12,000.

d) 0.

e) 0.

Significant Figures:

Determine the number of significant figures for each of the following measurements:

a) 2.303 meters

b) 5.50 seconds

c) 0.024 liters

d) 24.3 kilograms

e) 115.20 centimeters

f) 100 miles/hour

Chapter 2: Worksheet

Significant Figures (Part 2): Doing math with measured quantities

Perform the following and express your answers using the appropriate number of significant

figures:

a) 22.5 liters + 0.023 liters =

b) 110 apples – 25 apples =

c) 110 meters – 25 meters =

d)

25 moles

mole

grams

e) 50.45 cm

3

/ 0.02 cm

2

f)

mole

6022 x 10 atoms

25 moles

23

Unit Conversion:

Convert the following quantities and express your answers using the appropriate

number of significant figures:

a) 2.3 kilograms = ______ grams

b) 5.50 liters = _______ milliliters (mL)

c) 2.4 mL = ________ L

d) 24.3 calories = ________ joules (1 cal = 4.184 J)

e) 115.2 quarts = _________ liters (1 L = 1.057 qt)

f) 1013. kg/m

3

= ________ g/mL (1 mL = 1 cm

3

g) 100.0 mL/hr = _________ cm

3

/s (1 hr = 60 min = 3600 s)

Chapter 2: Worksheet

Density:

  1. Determine the density for the following substances:

i) 10.0 g of water (at 4

o

C) with a volume of 10.0 cm

3

ii) 10.0 g of ice with a volume of 10.9 cm

3

iii) 10.0 g of aluminum with a volume of 3.7 cm

3

iv) 10.0 g of gold with a volume of 0.52 cm

3

  1. Using the density values above, determine the amount of mass (grams) in 30.0 cm

3

of the

following substances:

i) Water (at 4

o

C):

ii) Ice:

iii) Aluminum:

iv) Gold:

  1. How much space do 50.0 grams of the following substances occupy?

v) Water (at 4

o

C):

vi) Ice:

vii) Aluminum:

viii) Gold:

A Practical Application:

An ailing patient in a hospital requires a certain drug to be administered at a rate of 40.0 cm

3

per hour. The intravenous (IV) drug delivery system that will deliver the medication controls

the drug delivery by measuring drip rate. Using this system, 30 drops are equal to 1.0 cm

3

of

medication.

a) What drip rate (drops per hour) is required to maintain a drug delivery of 40.0 cm

3

per

hour?

b) What is the drip rate in drops per second?

c) How many drops would you expect to count in 10.0 seconds?