# 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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