Calculate the atomic mass of gallium, symbol Ga. Gallium has two isotopes: Ga-69 and Ga-71. The relative abundance of Ga-69 is
60.12% and its atomic mass is 68.9257 amu, The relative abundance of Ga-71 is 39.88% and its atomic mass is 70.9249 amu.
A)
69.7241 amu
B)
69.9262 amu
70 amu
D
70.0000 amu
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Ответ:
or the math way is to find all the factors
76=2*2*19
so the answer is 2 times the square root of 19 or 8.72