Homework Clinic

Science Clinic => Chemistry => Topic started by: nelaaney on Nov 18, 2019

Title: Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the ...
Post by: nelaaney on Nov 18, 2019

Question 1

Gallium has an atomic mass of 69.723 u. The abundance of Ga-69 (68.926 u) is 60.11%. What is the atomic mass, in u, of the other isotope?
◦ 70.94 u
◦ 70.91 u
◦ 70.930 u
◦ 70.93 u
◦ 70.92 u

Question 2

Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the following masses and natural abundances:

Cr-50

49.9461 u

4.35%

Cr-52

51.9405 u

83.79%

Cr-53

52.9407 u

9.50%

Cr-54

53.9389 u

2.36%

◦ 208.7 u
◦ 51.69 u
◦ 51.94 u
◦ 52.00 u
◦ 53.21 u

Title: Calculate the atomic mass of chromium if chromium has four naturally occurring isotopes with the ...
Post by: Briannahope on Nov 18, 2019

Answer 1

70.92 u

Answer 2

52.00 u