Kingdom of Saudi Arabia
General Administration of Education in Aljouf
Academic Year 2021 - 2022
Subject: Chemistry.
Grade: 9.
Date: 1/2/2022.
Term: 2.
40
Time: 45 Min.
Student’s Name: ……………………………………………………………………
Question One:
(4 Marks.)
A volume is measured experimentally as 4.26 mL. What is the
percentage error, given that the correct value is 4.15 mL??
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Question Two:
(4 Marks.)
Determine the number of significant figures in each of the
following.
a. 804.05 g
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b. 0.014 403 0 km _ _ _ _ _ _ _ _ _ _
c. 1002 m
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d. 400 mL
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e. 30 000. Cm
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f. 0.000 625 000 kg_ _ _ _ _ _ _ _ _ _
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Question Three :
(4 Marks.)
1. What is the sum of 2.099 g and 0.05681 g? .
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2. Calculate the quantity 87.3 cm – 1.655 cm?
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Question Four :
(4 Marks.)
What is the volume, in milliliters, of a sample of helium
that has a mass of 1.73 × 10 –3 g, given that the density is
0.178 47 g/L?
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Question Five :
(4 Marks.)
What is the density of a piece of metal that has a mass of
6.25 × 105 g and is 38374.49 mL?
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Good Luck.
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