Answers: 2
(indium.)
.
, the number of atoms by the Avogadro constant, 
, would give the number of moles of atoms in this sample:
.
. Estimate the average mass of one mole of atoms in this sample:
.
in this example) is numerically equal to the average atomic mass of that element. Refer to a modern periodic table and look for the element with average atomic mass 
. Indium, 
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A 0.4272 g sample of an element contains 2.241 x 10 ^21 atoms . what is the symbol of the element?...
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