Chem 127 Practice Problems Main Menu

  1. Chapter 1
    1. Density of a Person
    2. Density of a Cow
    3. Solubility at Different Temperatures
    4. Different Temperature Scales
    5. Solubilities at Different Temperatures (slightly more complicated)
  2. Chapter 2 & 3
    1. Percent by Mass from Formula
    2. Formula from Percent by Mass
    3. Number of electons in sample of ammonium
    4. Mass of calcium nitrate needed to supply given amount of oxygen
    5. Mixture of NO with O2 The computer was rounding too early, hence earlier discrepencies between calculated and "correct" answers. Please accept my apologies. cwd
  3. Chapter 3
    1. Carbon Burning in Excess Oxygen
    2. Carbon Burning in Oxygen (Limiting Reagent)
    3. Carbon Burning in Oxygen (Limiting Reagent)
    4. Feldspar Weathering (Limiting Reagent)
    5. Feldspar Weathering (Limiting Reagent)
    6. Feldspar Weathering (Limiting Reagent, slightly harder)
    7. N2+3H2 (Limiting Reagent)
    8. Atoms in Macroscopic Sample
    9. Reaction of NO with O3
  4. Chapter 4
    1. A Mixing Question
    2. A Dilution Question
    3. Another Dilution Question
    4. Yet Another Dilution Question
    5. A Precipitation Question
    6. A Neutralization Question
  5. Chapter 5
    1. Mass of Helium Balloon
    2. Density of Helium Balloon
    3. Lifting Power of a Helium Balloon
    4. Compressing a Wet Gas
    5. Mole Fractions in a Wet Gas
    6. Stoichiometry of Gaseous Reactions
    7. Stoichiometry of Gaseous Reactions
    8. Reversed Balloon Problem
  6. Chapter 6
    1. Frequency of H atom Spectral Transition
    2. Wavelength of H atom Spectral Transition
    3. Frequency of Photon to Ionize an Atom
  7. Chapter 7
  8. Chapter 8
    1. Heat of Transformation of Graphite to Diamond
    2. Standard Heat of Formation of N2O5
    3. Heat of Reaction
    4. Adding (Combining) Thermochemical Equations
    5. Gases, Stoichiometry and Thermochemistry
    6. Standard Heat of Formation of B2H6
  9. Chapter 9
    1. Vapor Pressure using Clausius-Clapeyron Equation
    2. Density of Barium
    3. Boiling Point at Reduced Pressure