Boron has two naturally occurring isotopes, 10b and 11b, which have masses 10.0129 and 11.0093 amu, respectively. given the average atomic mass of boron (10.81 amu), determine the percent abundance of each isotope. (a) 50%10b, 50%11b (b) 20%10b, 80%11b (c) 98%10b, 2% 11b (d) 93%10b, 7%11b (e) 22%10b, 78%11b

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