Although carbon-12 is now used as the standard for atomic weights, this has not always been the case. Early attempts at classification used hydrogen as the standard, with the weight of hydrogen being set equal to 1.0000. Later attempts defined atomic weights using oxygen (with a weight of 16.0000 ). In each instance, the atomic weights of the other elements were defined relative to these masses. (To answer this question, you need more precise data on current atomic weights: H,1.00794 u; O, 15.9994 u.) (a) If H=1.0000 u was used as a standard for atomic weights, what would the atomic weight of oxygen be? What would be the value of Avogadro's number under these circumstances? (b) Assuming the standard is O=16.0000 u, determine the value for the atomic weight of hydrogen and the value of Avogadro's number.
Although carbon-12 is now used as the standard for atomic weights, this has not always been the case. Early attempts at classification used hydrogen as the standard, with the weight of hydrogen being set equal to 1.0000. Later attempts defined atomic weights using oxygen (with a weight of 16.0000 ). In each instance, the atomic weights of the other elements were defined relative to these masses. (To answer this question, you need more precise data on current atomic weights: H,1.00794 u; O, 15.9994 u.)
(a) If H=1.0000 u was used as a standard for atomic weights, what would the atomic weight of oxygen be? What would be the value of
(b) Assuming the standard is O=16.0000 u, determine the value for the atomic weight of hydrogen and the value of Avogadro's number.
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