Tutoring chemistry, the periodic table is important. The tutor mentions a peculiarity of it. The transition metals are the elements in the middle of the periodic table, starting the fourth row from the top. Their first element is scandium (Sc). …
Tutoring physics or chemistry, definitions are always important. The tutor compares closed system with isolated system. A closed system cannot lose or gain matter; it cannot exchange matter with the surrounding environment. An isolated system is closed as above, but …
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Tutoring biology, you deal with organic molecules. The tutor mentions the difference between lignin and cellulose. Cellulose and lignin are both found in cell walls. Cellulose is composed of many glucose units bonded together. Lignin, on the other hand, consists …
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Tutoring chemistry, the concept of acid strength is important. The tutor explains why nitric acid is more acidic that nitrous. Nitric acid (HNO3) and nitrous acid (HNO2) both have N as the central atom, and share the structure H-O-N….However, nitric …
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Tutoring statistics, you cover linear regression. The tutor shows how to get a best-fit line on the Casio fx-991ES PLUS C. Let’s imagine you have the following data x y 10.1 14.2 17.3 19.5 25.4 22.9 40.0 31.8 Furthermore, you’d …
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Tutoring organic chemistry, the composition of a fat or oil might be of interest. The tutor shares a resource. Today, my reading sent me after the molecular mass of a typical fat or oil. I found the triglyceride molecular weight …
Tutoring chemistry, you may mention kinetic energy of particles, diffusion, and effusion. The tutor gives a brief explanation. In my post from Jan 18, 2017, I define effuse: it means to escape from a container through a porous boundary. Graham’s …
Tutoring physics or chemistry, you might encounter Peukert’s Law, although it’s probably used more by industry. In my March 2 post I mentioned reserve capacity and Amp*hours as two ways to measure a battery’s potential output. Numerically they are convertible …
Tutoring chemistry, the term anhydride may pop up. An anhydride is a molecule that results from the removal of water. An acid anhydride will assume its acidic tendency if water is added. Nonmetal oxides typically are acid anhydrides – for …
Tutoring chemistry remains interesting because it’s full of neat concepts and applications. Zone refining is a technique that can produce highly pure samples; the semiconductors germanium and silicon can be zone-refined. For zone refining to work, the substance must reject …