Empirical Formula vs Molecular Formula Calculations for the MCAT

Leah here from leah4sci.com and in this MCAT video we’re going to look at Empirical versus Molecular Formula. You can find this entire video series along with the reactions and stoichiometry practice quiz by visiting my website leah4sci.com/reactions. The molecular formula as the name implies gives us the formula or the equation for a specific […]

Why is Carbon the Key to Life? (On Earth, Anyway)

No matter how green, how furry, how small, how big, or how weird, all known life forms are based on the chemistry of one element: carbon. But why carbon? And if we look out to the stars,, could there be a fundamentally different kind of life out there? Questions like these are really hard to […]

Mole and Avogadro’s Number in MCAT General Chemistry

Leah here from leah4sci.com/mcat and in this video we’re going to look at the mole concept in avogadro’s number. What is a mole? We’re not referring to a little rodent and we’re not referring to that thing that can show up on your skin and definitely not referring to a spy though that would be […]

Smart Alex – Amino Acids and Valency of Elements

Two carbon atoms, two oxygen atoms, one nitrogen atom and four hydrogen atoms. Vinegar All the bonds are used up That’s what amino acid is made of The number of bonds that an atom can make is called it’s valency Hydrogen has a valency of one Oxygen two Nitrogen three and carbon four bonds with […]