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In chemistry, a mole is actually a unit of measurement, like an inch, meter, or gram. It is 6.02 x 10^23 of something, usually atoms or molecules. For example, one mole of Hydrogen would contain 6.02 x 10^23 atoms of Hydrogen.

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13y ago
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12y ago

For example:

Mix a kilogram of tablesalt with a kilogram of glucose.

What is the mole percentage of glucose in this mixture?

MM NaCL = 58.443 g/mol

MM C6H12O6 = 180.1566 g/mol

1000 g / 58.44 g/mol = 17.11 mole

1000 g / 180.16 g/mol = 5.55 mole

Total is 17.11 + 5.55 = 22.66 mole

The mole percentage of glucose is 5.55 / 22.66 * 100 = 24.49%

So eventhough the mass percentage is 50%, the mole percentage is not.

This is important in determening the right amount of chemicals to add together in experiments. if a reaction says: 1x + 1y --> 1xy

and you add 1 kg x to 1 kg y, you will have 1 of these reactants in excess and you wont have as much of the product as you wanted to have.

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11y ago

One mole (6.023× 1023) is the amount of a pure substance

containing the same number of chemical units, as there are atoms in exactly 12 grams of carbon-12 (i.e. 6.023

×

1023).

One mole of water is equal to 18 grams of water, which is equal to 18 ml of water. (1gram=1ml of water)



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14y ago

6.02*10^23

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What is mole percent?

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How do you convert mole fraction to volume fraction of liquid?

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What is the empirical formula of a compound that is 40 percent sulfur and 60 percent oxygen by weight?

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A sample of air is made up of nitrogen oxygen and argon in the mole fractions 78 percent N2 21 percent O2 and 10 percent Ar what is the density of air at standard temperature and pressure?

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