NASA
NASA | MAVEN Imaging Ultraviolet Spectrograph
The philosophy of NASA's Mars Program has been "Follow the water," but "Where did the atmosphere go?" is still a lingering question. Although fluvial features such as dry riverbeds are visible on Mars, the atmosphere today is too thin to...
NASA
NASA | LEND: The Lunar Neutron Counter
How would you find water on the Moon? NASA's Lunar Reconnaissance Orbiter has a unique idea: Count the neutrons coming from the Moon!
FuseSchool
Acid + Metal Carbonate
In this video we will explore the reaction between acids and metal carbonates. Recall that an acid is a chemical that contains a special type of hydrogen that can be released into aqueous solution as a hydrogen ion, H+. Most metal...
Professor Dave Explains
Periodic Table Part 9: Noble Gases (He, Ne, Ar, Kr, Xe, Rn, Og)
It's time to check out Group 18 on the periodic table, the noble gases. This includes helium, neon, argon, krypton, xenon, radon, and oganesson. What can we say about their properties, reactivities, and applications? Let's find out!
Catalyst University
Quantum Mechanics | The Hydrogen Line Spectrum
Introductory video to the hydrogen line spectrum, which in part led to the initial development of quantum mechanics.
Professor Dave Explains
IIT/JEE Chemistry Practice #3: Empirical/Molecular Formula
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
IIT/JEE Chemistry Practice #18: Intermolecular Forces
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
IIT/JEE Chemistry Practice #16: Chemical Bonding
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
NASA
NASA | LRO Observes the LCROSS Impact
NASA scientists have revealed the lunar soil inside shadowy craters is rich in useful materials, that the moon is chemically active, and that it also has a water cycle. The Lunar Reconnaissance Orbiter, by observing the impact of the...
Professor Dave Explains
Practice Problem: Balancing Equations
Who couldn't use a little practice balancing equations? If you've seen my tutorial outlining how to do this, then you're ready for four rapid fire examples to make sure you're ready to do this on your own. Give them a shot!
Professor Dave Explains
IIT/JEE Chemistry Practice #20: Hybridization
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
Practice Problem: Hydrogenation, Isomerism, and Cyclohexane Chairs
For this one we need to understand the stereospecificity of hydrogenation over platinum metal, stereochemical relationships, and the relative stability of cyclohexane chair conformations.
Professor Dave Explains
Elemental Analysis: Empirical and Molecular Formulas
There's a thing with carbon and hydrogen in it. But how many of each?! That's the kind of thing a chemist should know. So let's do some elemental analysis!
Curated Video
Identifying Gases: Tests and Results
The video describes various tests that can be used to identify different gases. The narrator goes through four different gases, hydrogen, oxygen, carbon dioxide, and chlorine, and explains how to identify them. The video goes on to show...
Professor Dave Explains
Practice Problem: Oxidizing Agents
For this one we need to know the ability of different oxidizing agents to react with various functional groups, and what functional groups will result.
Professor Dave Explains
Practice Problem: Balancing Redox Reactions
We know about redox reactions, and we even learned how to balance them under both acidic and basic conditions. Time for a quiz! Balance this redox reaction.
Institute of Human Anatomy
The Science of Flatulence: Where Does Gas Come From and Why It Matters
In this video, we learn about the sources of flatus or gas in the digestive tract, how it is produced, and the potential dangers associated with it. The host uses humor and medical terminology to explain the science behind this bodily...
Professor Dave Explains
Practice Problem: Calculating Equilibrium Concentrations
We know how to write equilibrium constant expressions for any equilibrium, and we know that they relate the equilibrium constant to the equilibrium concentrations for all of the substances in the system. Let's see if we can calculate a...
Professor Dave Explains
IIT/JEE Chemistry Practice #10: Gas Stoichiometry
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Catalyst University
Corrin/B12 Biochemistry: Methylmalonyl-S-CoA Mutase Mechanism
Corrin/B12 Biochemistry: Methylmalonyl-S-CoA Mutase Mechanism
Professor Dave Explains
Practice Problem: Nuclear Reactions
We've learned about all the different types of nuclear reactions that can occur, so given this word problem, can you find the missing nuclide?
Professor Dave Explains
Practice Problem: IUPAC Nomenclature and Stereochemistry
For this one we will have to be able to interpret IUPAC nomenclature to draw molecular structure, including absolute configuration using the Cahn-Ingold-Prelog convention.