the average atomic mass of ga is 69.72 amu. calculate the abundance of each isotope.
other info: gallium consists of 2 naturally occuring isotpes with masses of 68.926 and 70.925 amu
please provide work too thanks!! i woudlnt ask this if i really couldnt figure it out, and i f i could do it on my own i would
2007-09-17 09:32:21 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
You have two relative abundances x and 1-x. Let's say the abundance of the 68.926 is x.
Then 68.926x + 70.925 (1-x) = 69.72
Then you just solve for x and change it to a %.
(68.926 - 70.925)x = 69.72 - 70.925
x = (69.72 - 70.925)/(68.926 - 70.925)
2007-09-17 09:38:28 · answer #1 · answered by smilam 5 · 0⤊ 0⤋
Solve: (68.926 x a) + (70.925 x b) = 69.72
and
a + b = 100
There - 2 simultaneous equations, and two unknowns.
2007-09-17 16:40:18 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋