The atomic mass of an element is the weighted average of the atomic masses of
A
the least abundant isotopes of the element
B.
the naturally occurring isotopes of the element
C.
the artificially produced isotopes of the element
D.
the natural and artificial isotopes of the element
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Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

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