Chemistry Isotopes Solution: What is the average atomic mass of silicon? Given ...

Solution: What is the average atomic mass of silicon? Given the following data, calculate the average atomic mass of silicon.isotope = Si-28amu =27.9769abundance(%) =92.18isotope = Si-29amu =28.9765abundance(%) =4.71isotope =Si-30amu =29.9738abundance(%) =3.12

Problem

What is the average atomic mass of silicon? Given the following data, calculate the average atomic mass of silicon.

isotope = Si-28
amu =27.9769
abundance(%) =92.18

isotope = Si-29
amu =28.9765
abundance(%) =4.71

isotope =Si-30
amu =29.9738
abundance(%) =3.12

Solution

We’re being asked to calculate the average atomic mass of Silicon (Si). We can use the following equation:


Atomic mass = mass × f.a.isotope1 + mass × f.a.isotope2+ mass × f.a.isotope3


where atomic mass = average atomic mass of the element and f.a. = fractional abundance of the isotope. To get f.a., we simply need to divide the given percent abundance by 100.

Solution BlurView Complete Written Solution

Additional Practice Problems

Isotopes

Isotopes

Q. Hydrogen has three isotopes (1H, 2H, and 3H), ...

Solved • Thu Oct 25 2018 17:57:13 GMT-0400 (EDT)

Isotopes

Q. Hydrogen has three isotopes (1H, 2H, and 3H), ...

Solved • Thu Oct 25 2018 17:57:13 GMT-0400 (EDT)

Isotopes

Q. Hydrogen has three isotopes (1H, 2H, and 3H), ...

Solved • Thu Oct 25 2018 17:57:13 GMT-0400 (EDT)