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# Molar mass of NaCl and other compounds

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❶For example, if we want to calculate the number of moles of NaCl in a particular gram we simply need to figure out the molar mass of NaCl and the mass of the substance in grams.

## Sciencing Video Vault   Sb 51 Antimony Te 52 Tellurium I 53 Iodine Xe 54 Xenon Cs 55 Caesium Ba 56 Barium Hf 72 Hafnium Ta 73 Tantalum W 74 Tungsten Re 75 Rhenium Os 76 Osmium Ir 77 Iridium Pt 78 Platinum Au 79 Gold Hg 80 Mercury Ti 81 Thallium Pb 82 Lead Bi 83 Bismuth Po 84 Polonium At 85 Astatine Rn 86 Radon Fr 87 Francium Ra 88 Radium Rf Rutherfordium Db Dubnium Sg Seaborgium Bh Bohrium Hs Hassium Mt Meitnerium Ds Darmstadium Rg Roentgenium Cn Copernicium Uut Unutrium Uuq Flerovium UuP Ununpentium Lv Livermorium Uus Ununseptium Uuo Ununoctium La 57 Lanthanum Ce 58 Cerium Pr 59 Praseodymium Nd 60 Neodymium Pm 61 Promethium Sm 62 Samarium Eu 63 Europium Gd 64 Gadolinium Tb 65 Terbium Dy 66 Dysprosium Ho 67 Holmium Er 68 Erbium Tm 69 Thulium Sodium has an atomic weight of 23 grams per mole, and sodium carbonate has two atoms of sodium for 46 grams per mole.

Carbon has 12 grams per mole, and oxygen weighs 16 grams for one mole, or 48 grams per mole in sodium carbonate. Add the weights together Combine the calculated masses of each component of the molecule to determine the mass of the molecule.

The mass of sodium carbonate weighs grams for one mole. One mole equals 6. Heavier atoms weigh more for the same amount of atoms, whereas lighter atoms weight less. To calculate the molar mass of an element, find the relative atomic mass of that element, then multiply the relative atomic mass by the molar mass constant.

To calculate the molar mass of a compound, calculate the molar mass of each element in the compound, then multiply the element's atomic mass by the number of atoms of that element in the compound. Add the molar masses of each element in the compound to calculate the molar mass of the compound!

Molar mass is the mass in grams of one mole of a substance. Find the relative atomic mass of the element. An element's relative atomic mass is the average mass, in atomic units, of a sample of all its isotopes. Locate the element and find the number underneath the symbol for the element.

It will not be a whole number, but will have decimals. For example, for hydrogen, the relative atomic mass is 1. Multiply the relative atomic mass by the molar mass constant.

This is defined as 0. This converts atomic units to grams per mole, making the molar mass of hydrogen 1. Some elements are only found in molecules of 2 atoms or more. This means that if you want to find the molar mass of elements that are composed of 2 atoms, such as hydrogen, oxygen, and chlorine, then you'll have to find their relative atomic masses.

Multiply them by the molar mass constant, and then multiply the result by 2. This mnemonic stands for hydrogen, oxygen, nitrogen, chlorine, bromine, iodine, and fluorine.

Find the chemical formula for the compound. This is the number of atoms in each element that makes up the compound. This information is given in any chemistry reference book. For example, the formula for hydrogen chloride hydrochloric acid is HCl; for glucose, it is C 6 H 12 O 6.

Using this formula, you can identify the number of atoms of each element that makes up the compound. For HCl, there is one atom of hydrogen and one atom of chlorine.

For C 6 H 12 O 6 , there are 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Find the relative atomic mass of each element in the compound.

Using the periodic table, locate the relative atomic mass for each element. It is the number located beneath the symbol for the element. The relative atomic masses of the elements in hydrochloric acid are: The relative atomic masses of the elements in glucose are: Calculate the molar mass of each element in the compound. Multiply the element's atomic mass by the number of atoms of that element in the compound.

This will give you the relative amount that each element contributes to the compound. For glucose, C 6 H 12 O 6 , the molar mass of each element is: ## Main Topics

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Molar massis a unit that enables scientists to calculate the weight of any chemical substance, be it an element or a compound. Molar mass is the sum of all of the atomic masses in a formula. Once one determines the molar mass of a substance, it will be easy to measure out one mole of that substance.

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Find the molar mass of acetic acid. There are three elements - carbon, hydrogen and oxygen - so find their atomic masses in the periodic table: grams per mol for carbon, grams per mol for hydrogen, and grams per mol for oxygen.

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Add the resulting molar mass for each element together to find the total molar mass of the chemical compound. In the example using water, you would add the molar mass of oxygen () to the molar mass of two atoms of hydrogen (); the resulting total molar mass of the compound would be Use the chemical formula to determine how many atoms of each substance are in the molecule. There are two sodium atoms, one carbon atom and three oxygen atoms per molecule of sodium carbonate. Plug in atomic weights. Use the periodic table of elements to find the atomic weights of sodium, carbon and oxygen to calculate molar mass.

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Find the atomic mass for each element by using the mass given in the Periodic Table or table of atomic tojikon.mlly the subscript (number of atoms) times the atomic mass of that element and add the masses of all of the elements in the molecule to get the molecular tojikon.ml mass usually is expressed in grams (g) or kilograms (kg). The mass of one mole of any element exactly equals the weight listed on the periodic table for its amu (atomic mass units)- the only difference is to realize the molar mass is actually a large enough quantity that can be weighed out and actually has the unit grams.