wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

IsotopeRelative Abudance(%)Atomic Mass(amu)12C98.8921213C1.10813.0033514C2×101014.00317

From the data given in the table, calculate the average atomic mass of C


A

13 u

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

12.011 u

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

12.001 u

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

12.0011 u

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B

12.011 u


Average atomic mass is the weighted average of atomic mass of all the isotopes.
Contribution by each isotope = (Relative abundance) (Atomic mass)
Contribution by
126C = (0.98892)(12)/100 = 11.86704

136C = (0.01108)(13.00335)/100 = 0.14407712

146C = (2 × 1010)(14.003170/100 = 28.00634 × 1012

Average atomic mass = sum of all contribution = 12.011 u


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction to Atoms
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon