An imaginary element (X) on Mars is composed of three isotopes, 50.24% of isotope X-16 with a mass of 16.0 amu, 18.95% of isotope X-14 with a mass of 14.0 amu, and 30.81% of isotope X-17 with a mass of 17.0 amu. Calculate the atomic mass (in amu) of the element. Type in your answer with 3 significant figures. 

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Atomic mass of element X x 100 Abundance of Isotope X16 x ... View the full answer