Chemistry, 13.09.2021 06:20, iesps010411

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1) An element has the following natural abundances and isotopic masses: 90.92%
abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82%
abundance with 21.99 amu. Calculate the average atomic mass of this element.
I
2) Calculate the formula mass of Ca(NO3)2

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