C-12 and c-13 are naturally occurring isotopes of the element carbon. c-12 occurs 98.89% of the time and c-13 occurs 1.108% of the time. what calculation should be used to determine the atomic mass of this element?

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Chemistry

Frank Dunn

27 September, 08:25

C-12 and c-13 are naturally occurring isotopes of the element carbon. c-12 occurs 98.89% of the time and c-13 occurs 1.108% of the time. what calculation should be used to determine the atomic mass of this element?

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Titus Vance · Answer 1

W₁ (¹²C) = 0.9889 (98.89%)

w₂ (¹³C) = 0.01108 (1.108%)

A (¹²C) = 12

A (¹³C) = 13

A (C) = w₁A (¹²C) + w₂A (¹³C)

A (C) = 0.9889*12+0.01108*13=12.01084 a. m. u.