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The mole concept is one of the topics with which you leave your preparation of physical chemistry in class 11. In this chapter, laws of chemical combination, daltons atomic theory, mole concept, empirical and molecular formula, stoichiometry and its calculations are discussed. Calculate the mass of i an atom of silver ii a molecule of carbon dioxide. Apr 25, 2019 we hope the ncert exemplar class 11 chemistry chapter 1 some basic concepts of chemistry help you. The number of moles of oxygen in 1l of air containing 21% oxygen by volume, under standard conditions, is a 0. Note that if it is not mention atom or molecule before mole, it always means one mole of that substance in its natural form.
Jul 28, 2012 cbse class 11 chemistry ch1 mole concept q1. Mole concept multiple choice questions and answers mcq. Some basic concepts of chemistry classroom free pdf notes. A mole or mol is defined as the amount of substance which contains equal number of particles atoms molecules ions as there are atoms in exactly 12.
Cbse xi science chemistry some basic concepts of chemistry. If the final density of solution is same as pure water then molarity of the iron in resulting solution which decides the nature of the above solution is 10. The mole concept is a convenient method of expressing the amount of a substance. Compounds or molecules result from combination of atoms in some simple numerical ratio. Ncert solutions for class 11 chemistry chapter 1 some basic concepts of chemistry act as important study material for the students.
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