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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
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
In a quiz problem, you compress a gas syringe to half its volume ata constant temperature. What happens to the value of the product PV, and why?
Matter and Measurement / Measurement and Data Processing
Why is itabsolutely vitalto convert temperature s to Kelvinwhen running calculations for Charles's Law or Gay-Lussac's Law?
Matter and Measurement / Measurement and Data Processing
Look closely at your page 6 data table. There is a huge jump in ionization energy between IE 6 (8,495k J/mol)and IE 7 (27,107k J/mol). What group is this element in, and why?
Matter and Measurement / Measurement and Data Processing
Copper (Cu) has an anomalous electron configuration ofinstead of the expected What is the energetic reason behind this?
Matter and Measurement / Measurement and Data Processing
Mathematically, how do you calculate the First Ionization Energy ink J/molif you are given the frequency(Hz)of the convergence limit for one single atom?
Matter and Measurement / Measurement and Data Processing
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
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
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
Under Boyle's Law, if you plot a graph of Pressure vs. Volume, what shape does it make? What shape do you get if you plot Pressure vs. 1/V instead?
Matter and Measurement / Measurement and Data Processing
Why does the line emission spectrum of hydrogen look like discrete lines on a black background instead of a continuous rainbow?
Matter and Measurement / Measurement and Data Processing
Why is the first ionization energy of Boron (1s^2 2s^2 2p^1) slightlylowerthan that of Beryllium 1s^2 2s^2), even though Boron has more protons in its nucleus?
Matter and Measurement / Measurement and Data Processing
Why does Oxygen (1s^2 2s^2 2p^4) show a sudden drop in first ionization energy compared to Nitrogen (1s^2 2s^2 2p^3)?
Matter and Measurement / Measurement and Data Processing
If an electron drops from a high energy level down to n = 1, which region of the electromagnetic spectrum is the emitted photon found in, and how does its energy compare to a transition down to n = 2?
Matter and Measurement / Measurement and Data Processing
What are the two main assumptions of the kinetic molecular theory regarding the particles of anideal gasthat distinguish it from a real gas?
Matter and Measurement / Measurement and Data Processing
Explain why the lines in an emission spectrum start to converge (get closer together) at higher frequencies/energies. What happens when they completely converge at n =infinity
Matter and Measurement / Measurement and Data Processing
A reaction in which one element replaces another element in a compound is best described as which reaction type?
Quantitative and Reaction Chemistry / Reactions, Oxidation States, and Stoichiometry
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