demi9223 demi9223

08-02-2024
Chemistry

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The element antimony (Sb) has an atomic mass of 121.76 amu. Two naturally occurring isotopes of antimony are ¹²¹Sb (57% abundant) and ¹²³Sb (43% abundant). In a sample of 100 Sb atoms, what is the probability that a single selected atom has a mass of 121.76 amu?
a) 57%
b) 43%
c) 25%
d) 50%

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