Question

If the elementyX is available in the
form of, say, two isotopes 12 x 6 (98. 9%)
and 13x7 (1.1%) calculate the average
atomic mass of elementX​

Answer 1

Answer:

Data:-

Element Abundance Atomic Mass

X

200

90% 200

X

199

8.0% 199

X

202

2.0% 202

Formula:-

Average atomic mass= [AtomicmassofX

200

×abundance+

AtomicmassofX

199

×abundance+AtomicmassofX

202

×abundance]/100

=

100

200×90+199×8.0+202×2.0

=

100

18000+1592+404

=199.96≈200u.

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