# How Much Do You Know About Iron Oxide?

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Do you have a chemistry test on iron oxide soon? Take this quiz to see how prepared you are for your exam.

• 1.

### The formula for Iron Oxide is _______________

• A.

Fe2O3

• B.

Fe3O2

• C.

FeOH

• D.

Fe4O5

A. Fe2O3
Explanation
The correct answer is Fe2O3 because it represents the formula for Iron Oxide. In this formula, Fe represents the chemical symbol for iron, and the subscript 2 indicates that there are two iron atoms present. The subscript 3 indicates that there are three oxygen atoms present. Therefore, Fe2O3 represents the correct formula for Iron Oxide.

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• 2.

### The molar mass of Iron Oxide is __________ g/mol

• A.

159

• B.

162

• C.

155

• D.

165

A. 159
Explanation
The molar mass of Iron Oxide is 159 g/mol because it is a compound made up of iron and oxygen. Iron has a molar mass of 56 g/mol and oxygen has a molar mass of 16 g/mol. Since there are two oxygen atoms in Iron Oxide, we multiply the molar mass of oxygen by 2 and add it to the molar mass of iron. This gives us a total molar mass of 56 + (16 * 2) = 56 + 32 = 88 g/mol for iron oxide. However, the question asks for the molar mass of Iron Oxide, not just iron, so the correct answer is 159 g/mol.

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• 3.

### The density is _______ g/cm3

• A.

6.24

• B.

5.24

• C.

4.24

• D.

3.24

B. 5.24
Explanation
The given answer, 5.24 g/cm3, is the correct density value. The question asks for the density, which is typically measured in grams per cubic centimeter (g/cm3). Therefore, the answer 5.24 g/cm3 is the appropriate value to represent the density.

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• 4.

### Iron oxide is also called ____________

• A.

Iron oxygen

• B.

Oxygenated iron

• C.

Ferric oxide

• D.

Ferric dioxide

C. Ferric oxide
Explanation
Iron oxide is the correct answer because it is the scientific name for the compound commonly known as rust. Iron oxide is formed when iron reacts with oxygen in the presence of water or moisture. It is a reddish-brown compound and is commonly used as a pigment in paints and coatings. Ferric oxide is a more specific term for iron oxide, as it refers to the compound in which iron has a +3 oxidation state.

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• 5.

### Is it a solid, gas or liquid?

• A.

Solid

• B.

Gas

• C.

Liquid

A. Solid
Explanation
The given correct answer is "Solid". This implies that the object or substance being referred to has a definite shape and volume, and its particles are closely packed and arranged in a regular pattern. Solids have a fixed shape and cannot be easily compressed or expanded.

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• 6.

### Iron Oxide is found in _______________

• A.

Limestone

• B.

Grapefruit

• C.

Magnetite

• D.

Kale

C. Magnetite
Explanation
Iron Oxide is found in magnetite. Magnetite is a naturally occurring mineral that is a major source of iron. It is a black or brownish-black mineral with a metallic luster and is often magnetic. Iron oxide refers to the chemical compound made up of iron and oxygen, and magnetite is one of the main forms of iron oxide. It is commonly found in igneous and metamorphic rocks, as well as in certain types of sedimentary rocks. Therefore, magnetite is the correct answer as it is a specific mineral where iron oxide can be found.

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• 7.

### Iron oxide is used to _____________

• A.

Make steel

• B.

Make fabric

• C.

Make contact lenses

A. Make steel
Explanation
Iron oxide is used to make steel because iron oxide, also known as rust, is a key ingredient in the process of producing steel. When iron oxide is combined with carbon and heated in a blast furnace, it undergoes a chemical reaction that results in the production of molten iron. This molten iron is then further processed and refined to create steel, which is a strong and durable alloy used in various industries such as construction, manufacturing, and transportation.

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• 8.

### Iron oxide is typically this color.

• A.

Red

• B.

Green

• C.

Blue

• D.

Yellow

A. Red
Explanation
Iron oxide is typically red in color because it is composed of iron atoms bonded with oxygen atoms. The red color is a result of the specific arrangement of atoms in the compound, which absorbs and reflects certain wavelengths of light. This absorption and reflection of light give iron oxide its characteristic red appearance.

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• Current Version
• Mar 14, 2023
Quiz Edited by
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• Mar 03, 2016
Quiz Created by
Dott2276

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