Chemistry, 26.09.2019 04:30, nathaliereyes283

Anewly discovered element, z, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267.8 u, and 9.7 percent of the sample is an isotope with a mass of 270.9 u. what is the weighted average atomic mass for this element? (2 points)

a)268.1 u

b)269.0 u

c)269.4 u

d)270.6 u

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Anewly discovered element, z, has two naturally occurring isotopes. 90.3 percent of the sample is an...