Podcast
Questions and Answers
What is the correct balanced equation for the formation of gallium oxide?
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?
When propane (C₃H₈) undergoes complete combustion, what is the coefficient for oxygen in the balanced equation?
- 7
- 5 (correct)
- 2
- 3
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?
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)?
What mass of oxygen gas is required to form 100 g of iron(III) oxide (Fe₂O₃, also known as rust)?
If 67 kg of ethanol (C₂H₅OH) is completely combusted, what mass of carbon dioxide (CO₂) is produced?
If 67 kg of ethanol (C₂H₅OH) is completely combusted, what mass of carbon dioxide (CO₂) is produced?
Flashcards
Calcium Fluoride Formula
Calcium Fluoride Formula
The chemical formula for calcium fluoride is CaF2.
Balanced Equation for Propane Combustion
Balanced Equation for Propane Combustion
C3H8 + 5 O2 → 3 CO2 + 4 H2O is the balanced equation for propane combustion.
Bauxite from Aluminum
Bauxite from Aluminum
From 250 g of aluminum, the maximum mass of bauxite produced is 660 g Al2O3.
Mass of Oxygen for Rust
Mass of Oxygen for Rust
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Ethyne (Acetylene) Combustion Requirements
Ethyne (Acetylene) Combustion Requirements
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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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