STEMOSPHERE
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Mixed Oxidation Number s Determine oxidation number s: a) Cr in Cr₂O₇²⁻ b) N in NH₄⁺ c) S in H₂SO₄ d) Cl in Cl O₄⁻ e) Mn in KMn O₄
Quantitative and Reaction Chemistry / Ideal Gas Model
Oxidation States + Redox Determine oxidation states and identify oxidation/reduction. 2Fe2 O3 +3C→4Fe+3CO2 Determine: a) Oxidation state of Fe before and after b) Oxidation state of C before and after c) Oxidized species d) Reduced species e) Oxidizing agent f) Reducing agent
Quantitative and Reaction Chemistry / Ideal Gas Model
Combustion + Gas Volume Complete combustion: C3 H8 +5O2 →3CO2 +4H2 O Burn 11.0 g propane. Determine: a) Mass CO₂ produced b) Volume CO₂ at STP
Quantitative and Reaction Chemistry / Ideal Gas Model
Density + Stoichiometry A liquid hydrocarbon has: Density = 0.82 g/cm³ Volume burned = 150 cm³ Reaction: 2C8 H18 +25O2 →16CO2 +18H2 O Determine: a) Mass fuel burned b) Moles fuel c) Volume CO₂ at STP
Quantitative and Reaction Chemistry / Ideal Gas Model
Empirical → Molecular Formula Compound contains: 48.6% C8.1% H43.3% O Actual molar mass = 148 g/mol Determine: a) Empirical formula b) Molecular formula
Quantitative and Reaction Chemistry / Ideal Gas Model
Limiting Reactant + Yield 2Al+Fe2 O3 →Al2 O3 +2Fe React: 16.2 g Al 40.0 g Fe₂O₃ Actual Fe obtained: 20.0 g Determine: a) Limiting reactant b) Theoretical yield c) Percent yield d) Excess reactant remaining
Quantitative and Reaction Chemistry / Ideal Gas Model
When pressure is measured in kPa for a gas-law calculation, which volume unit should be paired with it?
Quantitative and Reaction Chemistry / Ideal Gas Model