Question 1
Calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following masses and natural abundances:
◦ 70.68 u
◦ 69.80 u
◦ 70.00 u
◦ 69.93 u
◦ 69.72 u
Question 2
Silver has an atomic mass of 107.868 u. The Ag-109 isotope (108.905 u) has an abundance of 48.161%. What is the atomic mass, in u, of the other isotope?
◦ 106.911 u
◦ 106.908 u
◦ 106.903 u
◦ 106.905 u