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
=
=
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 | |||
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Which of the following are correct : (a) 1 Mole of a substance means M grams of that substance, where M is the Molar mass. (b) Avogadro number is N which is equal to 6.022 X 1023. | |||
Right Option : C | |||
View Explanation |
Find the mass of 8 mole of aluminium atoms ? | |||
Right Option : C | |||
View Explanation |
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