2. Two isotopes of carbon exist in nature: carbon-12 (natural abundance: 98.90%) and carbon-13 (natural abundance:...

Question

Question

science chemistry

Answer 1

Answer #1

There are two types of isotope of carbon

Carbon-12 : abundance 98.90% ,mass = 12 amu

Carbon -13: abundance 1.10 %, mass = 13 amu

Then avarage mass =

(Mass of isotope 1 ×%of their abundance + mass of isotope 2×% of their abundance )/100

Avarage atomic mass of carbon =

(12× 98.90 + 13 × 1.10)/100

= 12.01 (Answer)

Answer 2

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