OpenStudy (anonymous):
Which of the following describes how the weighted average atomic mass of an element having two isotopes is determined? (mass of isotope A + mass of isotope B)/ 2 (mass of isotope A + mass of isotope B) x (% abundance of isotope A + % abundance of isotope B) (mass of isotope A) x (% abundance of isotope A) + (mass of isotope B) x (% abundance of isotope B) 2(mass of isotope A + mass of isotope B) + (% abundance of isotope A + % abundance of isotope B) / 2 22. [02.03]Silicon has three naturally occurring isotopes. Silicon-28 has a mass of 27.98 and a relative abundance of 92.23%. Silicon-29 has a mass of 28.98 and a relative abundance of 4.68%. Silicon-30 has a mass of 29.97 and a relative abundance of 3.09%. What is the weighted average atomic mass of silicon? 27.99 g/mol 28.09 g/mol 28.98 g/mol 29.00 g/mol
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