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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.
Typology: Assignments
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Chapter 2: Worksheet
Chapter 2: Worksheet
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
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:
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
3
of the
following substances:
i) Water (at 4
o
ii) Ice:
iii) Aluminum:
iv) Gold:
v) Water (at 4
o
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?
