In other words, the mole is the amount of substance equal in mass to the combined mass in atomic mass units of the atoms of molecules of the substance multiplied by the Avogadro constant or Avogadro number. An elementary entity may be an atom, a molecule, an ion, an electron, any other particle or specified group of particles.Īvogadro constant N A = 6.02214076×10²³ mol⁻¹ The amount of substance, symbol n, of a system is a measure of the number of specified elementary entities. This number is the fixed numerical value of the Avogadro constant, N A, when expressed in the unit mol⁻¹ and is called the Avogadro number. One mole contains exactly 6.02214076×10²³ elementary entities. The mole, symbol mol, is the SI unit of the amount of substance. The mole is used to express the amounts of reactants and products of chemical reactions. In chemistry, it is important to measure their amounts accurately. Your comments are welcome in the comment box.All substances consist of atoms or molecules. # Please let us know if you find any mistakes. Calcium Chloride Hexahydrate (CaCl 2.6H 2O) Molecular Weight Calculation.Calcium Chloride Tetrahydrate (CaCl 2.4H 2O) Molecular Weight Calculation.Calcium Chloride Dihydrate (CaCl 2.2H 2O) Molecular Weight Calculation. Calcium Chloride (CaCl 2) Molecular Weight Calculation.Molecular weight of Calcium chloride dihydrate (CaCl 2.2H 2O): Calcium Chloride Dihydrate (CaCl 2.2H 2O) Molecular Weight Calculation Molecular weight of Calcium chloride dihydrate (CaCl 2.2H 2O) So the molecular weight of Calcium chloride dihydrate is 147.0142. Step 4: Calculate the molecular weight of Calcium chloride dihydrate by adding up the total weight of all atoms. Total weight of water in Calcium chloride dihydrate: 18.0154 x 2 = 36.0308 Number of water (H 2O) molecules in Calcium chloride dihydrate: 2 Total weight of Chlorine atoms in Calcium chloride dihydrate: 35.4527 x 2 = 70.9054 Number of Chlorine atoms in Calcium chloride dihydrate: 2 Total weight of Calcium atoms in Calcium chloride dihydrate: 40.078 x 1 = 40.078 Number of Calcium atoms in Calcium chloride dihydrate: 1 Step 3: Calculate the molecular weight of Calcium chloride dihydrate by adding the total weight of all atoms. Step 2: Find out the atomic weights of each atom (from the periodic table).Ītomic weight of Calcium (Ca): 40.078 (Ref: Ciaaw-calcium, Jlab-ele020)Ītomic weight of Chlorine (Cl): 35.4527 (Ref: Jlab-ele017) From the chemical formula, you can find that one molecule of Calcium chloride dihydrate consists of one Calcium (Ca) atom, two Chlorine (Cl) atoms, and two molecules of water. The chemical formula of Calcium chloride dihydrate is CaCl 2.2H 2O. You will know different atoms and their number in a Calcium chloride dihydrate molecule from the chemical formula. Step 1: Find out the chemical formula and determine constituent atoms and their number in a Calcium chloride dihydrate molecule. CALCULATION PROCEDURE: Calcium Chloride Dihydrate (CaCl 2.2H 2O) Molecular Weight Calculation The molecular weight of Calcium chloride dihydrate is 147.0142 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements and water molecules. The dihydrate form of Calcium Chloride (CaCl 2.2H 2O) also contains 2 water (H 2O) molecules. The molecular weight of Calcium chloride dihydrate (CAS Registry Number: 1) is 147.0142.Ĭalcium Chloride is an inorganic compound of two elements: Calcium (Ca) and Chlorine (Cl).
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