What is MOle Concept.

What is MOle Concept.


1 Answers

Raheema Javed
156 Points
9 years ago
A Mole is: [The Mole]

6.02 x 1023of anything.
The formula mass in grams of a substance contains one mole of particles.
Na=Avogadro's Number = 6.02 x 1023Spreading a "mole" of marbles over the entire surface of the earth would produce a layer about three miles thick.

Important mole conversion factors:
1 mole = 6.02 x 1023particles = formula mass in grams

Molar mass- the mass of a single atom of an element (in amu) is numerically equal to the mass of one mole of those atoms (in grams).

From the Periodie Table, the mass of one atom of chromium is 51.9961 amu.
The mass of one mole (6.02 X 1023) of chromium atoms is 51.9961 grams.

Coefficients in a chemical equation are normally used to indicate a ratio of reactingmolecules. They also indicate a ratio of reactingmoles. The mole concept allows chemists to use chemical equations to determine the "weight" of reactants and products in chemical reactions.For example: 2Mg(s)+ O2 (g)→ 2MgO(s)The balanced equation above shows that the product is 2 molecules of magnesium oxide. That also means 2 moles of magnesium oxide. By calculating the molar mass of MgO, then multiplying by the coefficient 2, the mass of MgO produced can be predicted from the balanced equation.

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