Question 9: Calculate the atomic mass (average) of chlorine using the following data: Chapter 1: Some Basic Concepts of Chemistry Chemistry Class 11 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. NCERT Solutions in text and vodeo class 11 chemistry chapter 1 Q-9 Calculate the atomic mass (average) of chlorine using the is solved by our expert teachers. You can get ncert solutions and notes for class 11 chapter 1 absolutely free. NCERT Solutions for class 11 Chemistry Chapter 1: Some Basic Concepts of Chemistry is very essencial for getting good marks in CBSE Board examinations
Answer
If C1 and C2 is % abundance and M1 and M2 is molar mass of element of an isotopes respectively than
The average atomic mass of isotopes = (C1 ×M1 + C2×M2)/100
Plug the values we get
The average atomic mass of chlorine = (75.77 × 34.9689 + 24.23 × 36.9659)/100
= 35.4527 u
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