Posted: September 3rd, 2022

Molar mass

Molar mass
The total grams of all atoms that make a mole of a molecule are known as molar mass. Scientists use an analytical balance to measure grams. Molar mass makes it easy to convert moles to grams and vice versa. A periodic table is used to identify the molar mass of elements, for example, copper in the periodic table has a molar mass of 63.55g/mol. When finding the molar mass of compounds. The first thing you should do is to check the molar mass of elements that make the compound in the periodic table. Then add them, the total is the molar mass.
The Molar mass of sodium chloride (NaCl)
Sodium chloride is made of sodium and chlorine. The molar mass of sodium is 22.98976, while that of chlorine is 34.453. To find the total molar mass of sodium chloride do a sum of 22.98976 and 34.453 which will add up to 58.44276. The molar mass of sodium chloride is 58.44276g/mol.
The Molar mass of sodium hydroxide (NaOH)
Sodium hydroxide is also a compound that contains sodium, oxygen, and hydrogen. The molar mass of sodium is 23, oxygen 16, and hydrogen 1. To find the molar mass of sodium hydroxide, add 23 to 16 and 1 which will add up to 40. The molar mass of sodium hydroxide is 40g/mol.
The molar mass of benzene (C6H6)
Benzene is a compound with the chemical formal C6H6. It has both carbon and hydrogen. To calculate the molar mass of benzene. You have to check the molar mass of carbon and hydrogen in the periodic table. The molar mass of carbon is 12.01 that of hydrogen is 1.01. Benzene has six carbons and 6 hydrogens. To calculate the total multiply 12.01 by 6 and 1.01 by 6. Then add the total (12)6 + (1.01)6 = 78.12 g/mol. The molar mass for benzene is 78.12g/mol.
The molar mass of air
Air contains different elements. It is made up of nitrogen, oxygen, carbon dioxide, and argon. Other elements such as helium, krypton, xenon, and neon account for a very small percentage of air and are often left out in the calculation of the molar mass. The fraction of nitrogen in the air is 0.7808, argon 0.00933, oxygen 0.2905, and carbon dioxide 0.003.
Nitrogen has a molar mass of 28g/mol, oxygen 32, carbon dioxide 44 and argon 40. To calculate the molar mass of air, multiply the molar mass of each element by the fraction in the air and then add the total. (28) 0.7808 + (32) 0.2905 + (44) 0.003 + (40) 0.00933 =28.96g/mol. The molar mass of air is 28.96g/mol.
The molar mass of sodium carbonate (Na2CO3)
Sodium carbonate is a compound that is made up of three elements. Sodium, carbon, and oxygen. To calculate its molar mass, you have to search for the molar mass of each element on the periodic table. Sodium has a molar mass of 22.99g/mol, carbon 12.01, and oxygen 16.00. Calculate the sum of the three molar masses. Remember there are two sodiums and three oxygens. (22.99)2 +12.01 + (16.00)3 = 105.99g/mol. The total molar mass of sodium carbonate is 105.99g/mol.

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