Chemistry on khan academy: did you know that everything is made out of chemicals chemistry is the study of matter: its composition, properties, and reactivity.
Chemistry some basic concepts of chemistry mole concept we know that a dozen is 12 items, a century is 100 items and a gross is 144 items. The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions the term gram-molecule was formerly used for essentially the same concept the term gram-atom has been used for a related but distinct concept,.
Chemistry is the study of matter: its composition, properties, and reactivity this material roughly covers a first-year high school or college course, and a good understanding of. The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions for example, the chemical equation 2 h 2 + o 2 → 2h 2 o implies that 2 mol dihydrogen (h 2 ) and 1 mol dioxygen (o 2 ) react to form 2 mol water (h 2 o. Key concepts and summary the formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units the formula mass of a covalent compound is also called the molecular mass a convenient amount unit for expressing very large numbers of atoms or molecules is the mole.
Mole concept calculation this is the most basic and the most used calculation that a student comes across while solving a mole concept problem most of the times, moles or number of atoms or molecules are given in the question and the mass is needed to be calculated in that case proceed as shown in the above example. The mole concept and avogadro's number a concept used for measure amount of particles like atoms, molecules number of atoms in the 6 c 12 element is equal to 1 mole.
Mole chemistry - the mole concept in chemistry is used to calculate the quantity or amount of chemical substances that are used and produced in a chemical reaction. The mole concept is no more complicated than the more familiar concept of a dozen : 1 dozen = 12 objects from the penny example above one might suspect that the mass of a mole of objects is huge. A mole of chemistry teachers is 602x10 23 chemistry teachers it's a lot easier to write the word 'mole' than to write '602x10 23 ' anytime you want to refer to a large number of things basically, that's why this particular unit was invented.
In latin mole means a massive heap of material it is convenient to think of a chemical mole as such visualizing a mole as a pile of particles, however, is just one way to understand this concept. What is the mole concept in chemistry, formula of mole concept the mole concept calculation, mole conversions | relationship between mass of an element and the number of moles. In chemistry the mole is a fundamental unit in the système international d'unités, the si system, and it is used to measure the amount of substance this quantity is sometimes referred to as the chemical amount in latin mole means a massive heap of material it is convenient to think of a chemical mole as such. One mole of glycine, c 2 h 5 o 2 n, contains 2 moles of carbon, 5 moles of hydrogen, 2 moles of oxygen, and 1 mole of nitrogen: the provided mass of glycine (~28 g) is a bit more than one-third the molar mass (~75 g/mol), so we would expect the computed result to be a bit greater than one-third of a mole (~033 mol.
The mole concept is one of the topics with which you kick-off your preparation of physical chemistry in class 11 one of the reasons for it being taught earlier is that the concept of mole will be required in almost every other topic of physical chemistry that you study later, irrespective of the complexity of that topic. We can argue that modern chemical science began when scientists started exploring the quantitative as well as the qualitative aspects of chemistry.
Let's talk about a concept that probably confuses chemistry students the most on some level but on some level it's also one of the simplest concepts and that's the idea of a mole, which in chemistry is different than the thing digging up your backyard, or the thing you want to get removed from your left eye a mole in chemistry is just a number.