Significance of the Mole
Significance of the Mole
Significance of Mole:
Mole is a SI unit of measurement for amount of substance (matter) since 1971. One mole of atoms or a compound means Avogadro number of atoms or molecules respectively. Avogadro number is N = .
Illustration: Calculate the volume at STP occupied by (i) 14g of Nitrogen
Solution: Molecular mass of nitrogen = 28u
1 mole of nitrogen 22.4L at STP i.e. 28g of nitrogen occupy = 22.4 liters at STP
14g of nitrogen occupy =
Illustration: Calculate the volume at STP occupied by molecules of oxygen
Solution: 1 mole of molecule =
molecules of oxygen will occupy
=
=
Avogadro number is __________________. | |||
| Right Option : A | |||
| View Explanation | |||
1 Mole of a substance means M grams of that substance, where M is the ________________________. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Mole is a SI unit of measurement for amount of substance (matter) since 1971. (b) 1 Mole of a substance means M grams of that substance, where M is the Molar mass. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
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