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Chemical Reactions and Stoichiometry Quiz

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Chemical Reactions and Stoichiometry Quiz

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Questions and Answers

What is the correct balanced equation for the formation of gallium oxide?

2Ga(s) + O₂(g) → 2GaO(s)

2Ga(s) + 3O₂(g) → Ga₂O₃(s)

4Ga(s) + 3O₂(g) → 2Ga₂O₃(s) (correct)

Ga(s) + O₂(g) → GaO₂(s)

When propane (C₃H₈) undergoes complete combustion, what is the coefficient for oxygen in the balanced equation?

5 (correct)

Bauxite is an ore of aluminum oxide (Al₂O₃). What mass of bauxite could be maximally produced from 250 g of pure aluminum metal, assuming all of the aluminum is converted?

250 g

377 g

944 g

472 g (correct)

What mass of oxygen gas is required to form 100 g of iron(III) oxide (Fe₂O₃, also known as rust)?

<p>30 g (A)</p> Signup and view all the answers

If 67 kg of ethanol (C₂H₅OH) is completely combusted, what mass of carbon dioxide (CO₂) is produced?

<p>129 kg (D)</p> Signup and view all the answers

Flashcards

Calcium Fluoride Formula

The chemical formula for calcium fluoride is CaF2.

Balanced Equation for Propane Combustion

C3H8 + 5 O2 → 3 CO2 + 4 H2O is the balanced equation for propane combustion.

Bauxite from Aluminum

From 250 g of aluminum, the maximum mass of bauxite produced is 660 g Al2O3.

Mass of Oxygen for Rust

To form 100 g of iron(III) oxide (rust), 30 g of oxygen gas is required.

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Ethyne (Acetylene) Combustion Requirements

To combust 1.11 kg of acetylene, 3.120 kg of oxygen gas is needed.

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Study Notes

Balancing Chemical Equations

Calcium fluoride: CaF₂
Aluminum chloride: AlCl₃
Gallium oxide: Ga₂O₃
Manganese(IV) oxide: MnO₂

Complete Combustion Reactions

Propane (C₃H₈): C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Decane (C₁₀H₂₂): 2C₁₀H₂₂ + 29O₂ → 20CO₂ + 22H₂O
Ethanol (C₂H₅OH): C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
Ethanoic acid (CH₃COOH): 2CH₃COOH + 3O₂ → 4CO₂ + 4H₂O

Gravimetric Stoichiometry Calculations

Aluminum Oxide Production (from aluminum):
- Aluminum oxide (bauxite): Al₂O₃
- Given 250 g of aluminum (Al). Calculate the mass of Al₂O₃ created
Oxygen Required for Rust Formation:
- Iron(III) oxide (rust): Fe₂O₃
- Given 100 g of rust (Fe₂O₃). Calculate the mass of oxygen (O₂) needed
Carbon Dioxide from Ethanol Combustion:
- Given 67 kg of ethanol (C₂H₅OH). Calculate the mass of carbon dioxide (CO₂) produced.
Oxygen Required for Acetylene Combustion:
- Ethyne (acetylene): C₂H₂
- 60 L tank containing 1.11 kg of acetylene (C₂H₂). Calculate the mass of oxygen (O₂) needed.

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Description

Test your understanding of balancing chemical equations, complete combustion reactions, and gravimetric stoichiometry. This quiz includes calculations related to different chemical compounds and their reactions. Perfect for chemistry students looking to reinforce their knowledge.