CBSE Class 11-science Answered
boron occurs in nature in form of two isotopes having atomic masses 10 and 11.what are the percentage abundances of these isotopes in a sample boron having averag atomic mass 10.8.please explain.
Asked by Akash Sundi | 26 Dec, 2011, 10:39: AM
Expert Answer
The percent abundance can be calculated by using the formula:
Average atomic weight of the element = (exact weight of isotope 1) X (abundance of isotope 1) + (exact weight of isotope 2) X (abundance of isotope 2)
Let the abundance of B-10 be assigned 'x' and the B-11 be '1 - x.'
So, (x) (10) + (1 - x) (11) = 10.8
10x + 11 - 11x = 10.8
x = 0.2
1 - x = 0.8
So, the percent abundance of B-10 is 20% and of B-11 is 80%.
Answered by | 26 Dec, 2011, 11:12: AM
Concept Videos
-
Basic Concepts of Chemistry
This video explains the concept of mole in terms of mass, volume, number an... -
Basic Concepts of Chemistry
This video explains the importance of chemistry in daily life, SI units of ... -
Basic Concepts of Chemistry
This video explains the concept percentage composition and empirical formul... -
Basic Concepts of Chemistry
This video explains classification and physical properties of matter. -
Basic Concepts of Chemistry
This video explains the law of conservation of mass, law of definite propor...
CBSE 11-science - Chemistry
Asked by hm6561889 | 15 Apr, 2024, 07:45: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by manikandanragul1 | 11 Apr, 2024, 09:02: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by jayag1298 | 08 Apr, 2024, 03:14: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by omniscientnjf2021 | 07 Apr, 2024, 10:18: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by ansh.skulkarni1158 | 07 Apr, 2024, 11:03: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by nikhithaguguloth14 | 29 Mar, 2024, 08:15: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by sumedhasingh238 | 27 Mar, 2024, 11:04: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by avijotsingh946431 | 22 Feb, 2024, 05:36: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by gurmelsinghray | 21 Feb, 2024, 08:43: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by VarunTYAGi9013 | 21 Oct, 2023, 07:14: PM
ANSWERED BY EXPERT
