Q. 114.2( 85 Votes )

The average atomi

Answer :

In order to solve this problem, we will have to suppose that the percentage of one of the isotopes in the sample is x, so that the percentage of the other isotope in the sample will be (100-x). Now:

(i) The mass of isotope is 16u. Suppose its percentage in the sample is x%.


(ii) The mass of isotope is 18 u. Its percentage in the sample will be (100-x)%.


So, Average atomic mass of X =


But the average atomic mass of X has been given to be 16.2 u. Therefore,


16.2 =



16.2 =


16.2 ×100 = 1800-2x


2x = 1800 – 1620


2x = 180



X = 90


Thus, the percentage of the isotope in the sample is 90%. The percentage of the isotope in the sample will be 100 – 90 = 10%.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Teaching the Basics of EconomicsTeaching the Basics of EconomicsTeaching the Basics of Economics53 mins
Master the Art of Writing Chemical FormulaeMaster the Art of Writing Chemical FormulaeMaster the Art of Writing Chemical Formulae42 mins
Final Phase & Legacy of the RevolutionFinal Phase & Legacy of the RevolutionFinal Phase & Legacy of the Revolution43 mins
The Tectonic StoryThe Tectonic StoryThe Tectonic Story63 mins
Mastering the NumericalsMastering the NumericalsMastering the Numericals43 mins
Louis XVI - The Story RecapLouis XVI - The Story RecapLouis XVI - The Story Recap65 mins
How's the Climate?How's the Climate?How's the Climate?63 mins
Master Mole Concept in 45 MinutesMaster Mole Concept in 45 MinutesMaster Mole Concept in 45 Minutes48 mins
Combinations of SolidsCombinations of SolidsCombinations of Solids43 mins
Law of GravitationLaw of GravitationLaw of Gravitation40 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

The composition oLakhmir Singh & Manjit Kaur - Chemistry

The number of proLakhmir Singh & Manjit Kaur - Chemistry

The atomic numberNCERT Science - Exemplar

In a sample of etLakhmir Singh & Manjit Kaur - Chemistry