The total mass of 6.023 x 10 23 H 2O molecules is about 18 g. One mole of H 2O is composed of 6.023 x 10 23 H 2O molecules. Now we can apply this for real substances. Molar mass of compound B is the sum of masses of 6.023 x 10 23 B molecules.Molar mass of compound A is the sum of masses of 6.023 x 10 23 A molecules.One mole of compound B is composed of 6.023 x 10 23 of B molecules.One mole of compound A is composed of 6.023 x 10 23 of A molecules.To avoid confusion, take a look at the following example. Therefore, the molar mass can be given a new definition, that is, molar mass is the total mass of 6.023 x 10 23 atoms (or molecules) of a particular substance. It is a constant because no matter what the type of atom is, one mole of it is equal to that amount of atoms (or molecules). This number is called the AvogadroвЂ™s number. One mole of a substance is equal to a very large number, 6.023 x 10 23 of atoms (or molecules) which the substance is made of. Mole or mol is the unit used to measure the amount of a substance. Molar Mass = Mass of the Substance (Kg)/Amount of Substance (Mol) The molar mass can be calculated using the following equation. However, the SI unit for molar mass is kgmol -1 (or kg/mol). The most commonly used unit for the molar mass of a substance is gmol -1. Molar mass is the mass of a mole of a particular substance. Key Terms:В AvogadroвЂ™s Number, Boiling Point, Calusius-Clapeyron, Cryoscopic Constant, Ebullioscopic Constant, Freezing Point, Melting Point, Molality, Molar Mass, Molecular Weight, Osmotic Pressure, Relative Atomic Mass What is the Importance of Knowing the Molar Mass of a Substance вЂ“ Definition, Equation for Calculation, ExplanationДЈ. Some of these major methods will be discussed concisely in this article. Some of these methods include using the direct equation, adding the atomic masses of different elements in a compound, and using boiling point elevation or freezing point depression. There is more than one method to calculate the molar mass. It is very useful in analyzing, comparing and predicting the other physical and chemical properties such as density, melting point, boiling point, and the amount of substance that react with another substance in a system. #c = '5.0357 moles'/'1.00 L' = '5.Molar mass is a physical property of substances. Since molarity is defined as moles of solute, which in your case is hydrochloric acid, divided by liters of solution, and you picked an initial sample of #'1.00-L'#, it follows that the solution's molarity will be Next, use hydrochloric acid's molar mass to determine how many moles of hydrochloric acid you have in this many grams Next, use its percent concentration by mass to determine how much hydrochloric acid it contains

To make the calculations easier, pick a #'1.00-L'# sample of this solution. Now, you're going to need the percent concentration by mass of hydrochloric acid in this solution, which you can look up hereДЄ hydrochloric acid solution that has a density of #'1.08 g/mL'# (I assumed room temperature) is about #17%'w/w'#'HCl'#, that is, you get #'17 g'# of hydrochloric acid for every #'100.0g '# of solution. To find its molarity, you need to pick a sample of this solution and figure out how many moles of hydrochloric acid it contains. So, you know what the density of the solution is. #'SG' = rho_'HCl'/rho_'water' implies rho_'HCl' = 'SG' xx rho_'water'# More specifically, the density of your hydrochloric acid solution will be equal to In this context, hydrochloric acid's specific gravity tells you what the density of a specific hydrochloric acid solution is compared with that of water. Since no mention of temperature was made, you can assume the density of water to be equal to #'1.00 g/mL'#. More often than not, that reference substance is water. Specific gravity usually refers to the ratio between the density of a given substance and the density of a reference substance at the same temperature. Before doing anything else, make sure that you have a clear understanding of what specific gravity means.

Hcl molar mass