Question

The atomic mass of 13C is 13.003355. Multiply the atomic mass of 13C by its abundance. Report the number to 8 significant digits.

Answer 1

Answer is: number is 0.14303691.

Carbon-13 (¹³C) is a stable isotope of carbon with mass number 13, it has six protons and seven neutrons.

Isotopes are chemical elements with same atomic number, but different mass number (different number of neutrons).

ω(¹³C) = 1.10% ÷ 100%.

ω(¹³C) = 0.0110; abundance of carbon-13 in nature.

m(¹³C) = 13.003355; the atomic mass of carbon-13.

ω(¹³C) · m(¹³C) = 0.0110 · 13.003355.

ω(¹³C) · m(¹³C) = 0.14303691.