You synthesize a sample of a superheavy element with an atomic number of 180.In a mass spectrometer, you find two peaks at 5.08113 * 10^-25kg and 5.11434 *10^-25kg, with the former appearing to be about 2.500 times larger than the latter.What is the approximate average atomic mass of this element in amu?
(1 amu = 1.6605 *10^-27kg.)

Question

Quizplus · Accepted Answer

To find the average atomic mass, convert the masses from kg to amu and use the relative abundance to calculate the weighted average. The first peak is 5.08113 x 10^-25 kg / 1.6605 x 10^-27 kg/amu = 305.9 amu, and the second peak is 5.11434 x 10^-25 kg / 1.6605 x 10^-27 kg/amu = 308.1 amu. The weighted average is (2.5 * 305.9 + 1 * 308.1) / 3.5 = 306.6 amu.

You Synthesize a Sample of a Superheavy Element with an Atomic