The average molecular weight for element x is 59.97 g/mol. there are two known isotopes of element x, one weighing 59 g/mol, and the other weighing 61 g/mol. what is the relative abundance of each?
possible answers:
50% x-59, 50% x-61
75% x-59, 25% x-61
63% x-59, 37% x-61
51.5% x-59, 48.5% x-61
48.5% x-59, 51.5% x-61
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