Another Mass Composition Problem

Lecture Description

Another exercise converting a mass composition to an empirical formula.

Course Description

Videos on chemistry (roughly covering a first-year high school or college course).

Course Index

1. Introduction to the Atom
2. Orbitals
3. More on Orbitals and Electron Configuration
4. Electron Configuration 1
5. Electron Configuration 2
6. Valence Electrons
7. Groups of the Periodic Table
8. Periodic Table Trends: Ionization
9. Other Periodic Table Trends
10. Ionic, Covalent, and Metallic Bonds
11. Molecular and Emperical Formulas
12. The Mole and Avogadro's Number
13. Formula From Mass Composition
14. Another Mass Composition Problem
15. Balancing Chemical Equations
16. Stoichiometry
17. Stoichiometry: Limiting Reagent
18. Ideal Gas Equation: PV=nRT
19. Ideal Gas Equation Example 1
20. Ideal Gas Equation Example 2
21. Ideal Gas Equation Example 3
22. Ideal Gas Equation Example 4
23. Partial Pressure
24. States of Matter
25. States of Matter Follow-up
26. Specific Heat, Heat of Fusion and Vaporization
27. Chilling Water Problem
28. Van Der Waals Forces
29. Covalent Networks, Metallic, and Ionic Crystals
30. Vapor Pressure
31. Suspensions, Colloids and Solutions
32. Solubility
33. Boiling Point Elevation and Freezing Point Supression
34. Introduction to Kinetics
35. Reactions in Equilibrium
36. Mini-video on Ion Size
37. Keq Intuition
38. Keq Derivation Intuition
39. Heterogenous Equilibrium
40. Le Chatelier's Principle
41. Introduction to pH, pOH, and pKw
42. Acid Base Introduction
43. pH, pOH of Strong Acids and Bases
44. pH of a Weak Acid
45. pH of a Weak Base
46. Conjugate Acids and Bases
47. pKa and pKb Relationship
48. Buffers and Hendersen-Hasselbalch
49. Strong Acid Titration
50. Weak Acid Titration
51. Half Equivalence Point
52. Titration Roundup
53. Introduction to Oxidation States
54. More on Oxidation States
55. Hydrogen Peroxide Correction
56. Redox Reactions
57. Galvanic Cells
58. Types of Decay
59. Half-Life
60. Exponential Decay Formula Proof
61. Introduction to Exponential Decay
62. More Exponential Decay Examples
63. Macrostates and Microstates
64. Quasistatic and Reversible Processes
65. First Law of Thermodynamics/Internal Energy
66. More on Internal Energy
67. Work from Expansion
68. PV-diagrams and Expansion Work
69. Proof: U=(3/2)PV or U=(3/2)nRT
70. Work Done by Isothermic Process
71. Carnot Cycle and Carnot Engine
72. Proof: Volume Ratios in a Carnot Cycle
73. Proof: S (or Entropy) is a Valid State Variable
74. Thermodynamic Entropy Definition Clarification
75. Reconciling Thermodynamic and State Definitions of Entropy
76. Entropy Intuition
77. Maxwell's Demon
78. More on Energy
79. Efficiency of a Carnot Engine
80. Carnot Efficiency 2: Reversing the Cycle
81. Carnot Efficiency 3: Proving That it is the Most Efficient
82. Heat of Formation
83. Hess's Law and Reaction Enthalpy Change
84. Gibbs Free Energy and Spontaneity
85. Gibbs Free Energy Example
86. Rigorous Gibbs Free Energy/Spontaneity Relationship
87. A Look at a Seductive But Wrong Gibbs/Spontaneity Proof
88. Stoichiometry Example Problem 1
89. Stoichiometry Example Problem 2
90. Limiting Reactant Example Problem 1
91. Empirical and Molecular Formulas from Stoichiometry
92. Example of Finding Reactant Emperical Formula
93. Stoichiometry of a Reaction in Solution
94. Another Stoichiometry Example in a Solution
95. Molecular and Empirical Forumlas from Percent Composition
96. Acid Base Titration
97. Spectrophotometry Introduction
98. Spectrophotometry Example
99. Hess's Law Example
100. Vapor Pressure Example
101. Change of State Example