Define mole....
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by ?Ritesh Gupta? 5 years ago
- 4 answers
Gaurav Seth 5 years ago
Mole Concept
Term mole was suggested by Ostwald (Latin word mole = heap)
A mole is defined as the amount of substance which contains same number of elementary particles (atoms, molecules or ions) as the number of atoms present in 12 g of carbon (C-12).
1 mol = 6.023 * 1023 atoms = one gram-atom = gram atomic mass
1 mol = 6.023 * 1023 molecules = gram molecular mass
In gaseous state at STP (T = 273 K, p = 1 atm)
Gram molecular mass = 1 mol
= 22.4 L = 6.022 * 1023 molecules
Standard number 6.023x 1023 is called Avogadro number in honour of Avogadro (he did not give this number) and is denoted by NA.
The volume occupied by one mole molecules of a gaseous substance is called molar volume or gram molecular volume.
Number of moles = amount of substance (in gram) / molar mass
Test
Related Questions
Posted by Rihan Mehta 1 year, 5 months ago
- 0 answers
Posted by Shaila Bombe 1 year, 5 months ago
- 1 answers
Posted by "Serai✨ Wallance" 1 year, 5 months ago
- 0 answers
Posted by Parneet Kaur 1 year ago
- 0 answers
Posted by Naman Mehra 1 year, 5 months ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Anmol Agarwal 5 years ago
0Thank You