Oxidation State and Equivalents The oxidation state of an element describes the number of electrons transferred in reactions. For example, the oxidation or valence states of the following elements are equal to the number of equivalents: • Calcium: Ca+2 ion: valence of 2: number or no. of ...
How can one balance chemical equations with given oxidation numbers? If you know the atomic number and the mass number of an isotope of an element, how can you determine the number of protons and neutrons? Aluminum is a main-group metal and therefore loses ...
the butler did it. Doctors use it to determine the illness behind a set of symptoms. Whenever you have two or more theories that make exactly the same predictions, the simpler one is always
However, the nature of oxidation, metal dissolution, and interface reactions between the oxide film and the metal surface and all the element-specific effects remain elusive. The reason is that the underlying mechanisms are hidden in the nanoscale, and the atomic configurations and partitioning ...
Once an electron moves to a higher-energy orbit, it eventually wants to return to the ground state. When it does, it releases its energy as a photon — a particle of light. You see atoms releasing energy as photons all the time. For example, when the heating element in a toaster turns...
aSend a written message to the harasser. This can often succeed in stopping sexual harassment. Include a factual account of the offending behavior, describe how you felt about it, and state simply that you want that particular behavior to stop. 寄发一则书面消息到harasser。 这可能在停止性骚扰...
Ascorbic acid is pure Vitamin C, provides the strong effect oxidation resistance and the protective function, maintains the skin elasticity and the defense mechanism, may return to original state the melanin into the extremely good anti-old beautiful white element.[translate] ...
The flame test can be used to distinguish between the oxidation states of atoms of a single element, too. For example, copper(I) emits blue light during the flame test, while copper(II) emits green light. A metal salt consists of a component cation (the metal) and an anion. The anion...
Cedar, cedary: The smell of cedar wood often found in bottle-aged Bordeaux red wines and Cabernet Sauvignons; an element of bouquet. Chewy: A rich, full-bodied, tannic red wine with lots of flavor, similar to brawny. Cigar box: Aroma of cigar leaf before burning coupled with a cedary...
1. How much energy will it take to bring up the temperature of a 2 kg brick (specific heat = 840 J/kgoC) by 10 degrees Celsius? 2. What is the heat of formation for the following equation? CH4(g) + 2 At 300 K, what is the maximum enthalpy that a substance with an entropy of...