Professor Dave Explains
IIT/JEE Chemistry Practice #30: Spontaneity
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
IIT/JEE Chemistry Practice #27: Resonance Energy
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Professor Dave Explains
IIT/JEE Chemistry Practice #34: Equilibrium Constants
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Professor Dave Explains
IIT/JEE Chemistry Practice #9: Molarity/Molality
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
IIT/JEE Chemistry Practice #35: Gaseous Equilibria
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Easy Languages
Life in Oaxaca
Easy Languages is an international video project aiming at supporting people worldwide to learn languages through authentic street interviews and expose the street culture of participating partner countries abroad. Episodes are produced...
Professor Dave Explains
IIT/JEE Chemistry Practice #22: Density of a Gas
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
Practice Problem: Cell Potential, Equilibrium Constants, and Free Energy Change
Mercy me, how are cell potential, equilibrium constants, and free energy change all related? By a few different equations, that's how. See if you can solve for these values given some data!
Professor Dave Explains
IIT/JEE Chemistry Practice #3: Empirical/Molecular Formula
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Professor Dave Explains
IIT/JEE Chemistry Practice #25: Enthalpy of Formation
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Professor Dave Explains
IIT/JEE Chemistry Practice #7: Molality/Mole Fraction
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Professor Dave Explains
IIT/JEE Chemistry Practice #24: Molar Mass of a Gas
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Professor Dave Explains
Practice Problem: Free Energy and Nonstandard Conditions
We know that a lot of thermodynamic data is collected under standard conditions, but sometimes we will want to assess the free energy change associated with a process that is not occurring under standard conditions. Any other conditions...
Professor Dave Explains
Practice Problem: Conversions Using Avogadro's Number
The concept of the mole is a little tricky when you first learn about, but soon you're converting between grams and moles and atoms with ease. Let's practice some conversions using Avogadro's Number now!
Professor Dave Explains
Practice Problem: Enthalpy of Combustion
Stoichiometry for combustion? You bet! If we know about moles, we can calculate energy changes. Give it a try!
Professor Dave Explains
Practice Problem: Calculating Free Energy Change
We know that the free energy change associated with a process will tell us whether it is spontaneous or not. And we also know that this depends on the change in enthalpy and the change in entropy for that process, as well as the...
Professor Dave Explains
IIT/JEE Chemistry Practice #21: Properties of Gases
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Professor Dave Explains
IIT/JEE Chemistry Practice #2: Molar Mass/Stoichiometry
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Schooling Online
Chemistry Skills: Units
Did you know that (at least) one mark in the HSC Chemistry exam comes from using the correct units? If you know your SI units well, then you’re guaranteed a free mark! If only the rest of the exam was that easy! This lesson will cover...
Professor Dave Explains
Practice Problem: Density of a Gas
If we can use the ideal gas law to find the molar mass of a gas and therefore identify the gas, what can we do with the density of a gas? Well, pretty much the same thing, it just involves one extra calculation, so let's give it a try!
Professor Dave Explains
IIT/JEE Chemistry Practice #1: Avogadro's Number/Moles
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Catalyst University
y=mx+b for the Arrhenius Equation (Ln|k| vs [1/T])
y=mx+b for the Arrhenius Equation (Ln|k| vs [1/T])
Professor Dave Explains
Practice Problem: Gravimetric Analysis
What the heck is gravimetric analysis? Well let's say we want to know how much of a substance is in some mixture. We could toss it in solution and cause it to form a precipitate with some other ion in solution. We can measure the mass of...
Professor Dave Explains
Practice Problem: Molar Mass of a Gas
We know about the ideal gas law, but what are some clever things we can do with it? Well, how about identifying an unknown gas by solving for its molar mass? Sure, why not!