What is the mole? one equivalent in grams
What is the mole? It is an interesting question, to which we have not given the importance it has at a general level. We have become accustomed to talking about the mass of a substance, forgetting the differences that exist between the diversity of the number of particles that make it up. These can have the same amount of mass even if they are called different. They constitute the materials. Anywhere around us there are millions of molecules, atoms, particles present. Last but not least we have the mol, who is related to the previous ones.
Than the mole in chemistry?
The mole, is a portion or a constant quantity related to the number of particles. It is of great importance in chemistry. Because it allows to perform quite a few stoichiometric calculations in relation to a reagent or a product. It is used for calculations of concentration in molarity, molecular mass. For one gas equals or is equal to 22.4 liters, it is the molar volume. The word comes from the Latin “Mole” which means pile, heap.
It was first used by Ostward in 1886. It I a fundamental unit in the international system of mea ure (IUPAC). It measures the amount of substance, which has elementary particles (1971).The world governing body at the beginning of the twentieth century, they defined that it is term. They performed the comparison of the amount of substance with the carbon atom.
Which will be assumed as a certain amount of substances will be expressed in moles. Taking as a reference the atoms and particle. Its symbol was denoted by the word "Mole" as the amount of matter possessed by a particle, atoms or the fundamental units. One mole is equal to the molecular mass, of one atoms or molecules in grams.
It is considered that the Avogadro number corresponds to 6,023.10 (+23). It is part of the atomic mass units equal to 1 gram of mass (measure of atomic mass). It is a close relationship between the atom, the g.
What is mol and examples?
Chemically, it is a unit of quantity of substance, where there is a defined number of particles of infinitesimal size, such as atoms, molecules or others that can be quantified by means of a balance. Examples: One mole of hydrogen atoms has 6.023 x 10 (+23). One mole of hydrogen molecules is 6.023 x 10 (+23).
Sodium ions has 6.023 x 10 (+23). Jose weighed 36 grams of glucose to prepare a solution. How many moles is that mass equal to?, How many glucose molecules did that mass contain?, Calculate the mass of glucose?First, the molecular mass of glucose is needed is 180 gr/mol. The value of the Avogadro number is 6,023 x 10 (+23).
Second, we will apply the conversion factor to answer the unknowns. Looking for the moles we will make: 36 gr of glucose X 1 mol glucose / 180 gr of glucose, moles = 0.2. Equivalent to 36 grams of glucose is 0.2. Looking for the molecules we have to: 0.2 mol glucose X 6.023 x 10 (+23) /1 mol glucose. Glucose molecules = 1.0246 X 10 (+23). Looking for the mass in grams: 1 molecule X 180 GR/6.023 X 10 (+23) = 2.99 X 10 (-22).
What is the utility of a mole in chemistry?
The utility in chemistry is wide, in particular it establishes the relationship between mass, volume and particles. It allows many stoichiometric calculations on the reactants and the product within a chemical reaction. It is used to express concentrations, in physical units of percent mass/mass, mass/volume, volume/volume.
In the chemical units, in the molarity, in the molar fraction, in the determinations of the valuations of solutions. the colligative properties of solutions, vapor pressure, on the reaction rate. In any other that relates the mass in grams, with the volume, the atoms or molecules. It is a way of measuring the mass of compounds.
How to calculate in mol?
Proceeding from the characteristic it says, it is equal to the molecular mass, according to one mole of atoms or molecules. In the concentration units where the % m/m = gr of solute/gr of solution X 100. For chemical units, M = moles of solute/liters of solution, M = n/L, another way is to add from the same formula to the volume of the solution where: M = n (sto)/ Vsol(Lts), M x Vsol(Lts) = n(sto).
So Vsol (Lts) = n (sto)/ M. Symbology means, n = moles, Vsol = volume of the solution, M = molarity. The molar fraction (X) = n(sto)/n(ste) x n(sto), the meaning is, X = molar fraction, n(sto) = moles of solute, n(ste). In the valuations where the mole / Lts units are related, in the establishment of the rule of three for example.
If one mole of sodium hydroxide is equivalent to 40 gr (molecular weight), it contains 0.3 moles of the same base, how many gr is equivalent to.where X = 0.3 mol x 40 gr/1 mol, X = 12 gr NaOH. In the volumetric analysis, making the molar ratio of an acid and a base where: V acid X C acid /1 mol = V base X C base /1 mol.
What is the mole?, it is interesting to seek to give an answer to this question. I hope that in this article you have achieved the guidance you needed, enter the publication every time you need to clarify some concept within it.
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