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Course: Alhussan Chemistry — Stage 7
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Alhussan Chemistry — Stage 7

Chapter 1: The Particle Model and States of Matter

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Chapter 2: Elements, Compounds and Mixtures

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Chapter 3: Metals and Non-Metals

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Chapter 4: Chemical Reactions 1

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Chapter 5: Acids and Alkalis

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Chapter 6: The Earth and Plate Tectonics

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Quiz

2.11 Comparing elements, mixtures, and compounds — Quiz

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  • Questions count: 10
  • Passing grade: B+
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1.
Iron and sulfur powders are mixed. How can the iron be removed?
With a magnet
It cannot be removed
By adding water
By heating
2.
When iron and sulfur are heated together, what forms?
Iron oxide
A mixture of iron and sulfur
Sulfur dioxide only
Iron sulfide, FeS
3.
True or false? Iron sulfide is attracted to a magnet like iron.
True
False
4.
Iron sulfide always has 7 g of iron for every ____ g of sulfur.
11
1
4
7
5.
Which term matches this definition? “A pure substance with two or more elements bonded in a fixed ratio.”
Solution
Compound
Mixture
Element
6.
True or false? Elements and compounds are both pure substances.
True
False
7.
How much sulfur reacts with 21 g of iron to make iron sulfide? (7 g Fe : 4 g S)
37 g
12 g
5 g
14 g
8.
14 g of iron reacts with sulfur to make iron sulfide. What mass of iron sulfide forms? (7 g Fe + 4 g S → 11 g FeS)
14 g
22 g
8 g
18 g
9.
Which diagram shows an element made of molecules?
Dr Dabour Hub Academy - figure 1
A
B
C
D
10.
Sodium is a shiny metal and chlorine a poisonous gas. Sodium chloride is table salt. This shows:
Sodium is a gas
A compound has different properties from its elements
Compounds are always poisonous
Mixtures keep properties
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Part of Chapter 2: Elements, Compounds and Mixtures — see every lesson and quiz in this unit.
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