Advertisements
Advertisements
Question
What do you understand by the term mole? How many elementary units are in one mole of a substance?
Advertisements
Solution
"A mole is defined as the amount (mass) of a substance containing elementary particles like atoms, molecules or ions equal to Avogadro's number i .e. 6.023 x 1023.
Or a collect ion of 6.023 x 1023 particles is called mole.
Number of elementary uni ts present in one mole of a substance is 6.023 x 1023.
APPEARS IN
RELATED QUESTIONS
What is the mass of 0.5 mole of water molecules?
How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
How many atoms are there in 0.25 mole of hydrogen ?
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
How many grams of Al are present in 0.2 mole of it?
Calculate the mass of 0.1 mole of the following:
Na2SO4.10H2O
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
The molecular formula for elemental sulphur is S8.In a sample of 5.12 g of sulphur:
How many molecules and atoms are present?
How many grams are there in the following?
3 moles of chlorine molecule, Cl2.
How many grams are there in the following?
5 moles of sulphur molecule, S8
The number of atoms present in 0.1 mole of P4 (at. mass = 31) is ______.
