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Social ScienceCalculate the number of atoms of Fe in a sample with mass = 1899 amu.
Expert Answer
A sample of Fe of mass 1899 amu.
The number of atoms of Fe in a sample is to be calculated.
Convert AMU into grams,
1 u=1.661×10-24g
1899 u will be comprising of how many grams?
1899 X 1.661×10-24lg = 3.1 X 10-21g
Calculate the number of atoms:
1 mole of Fe weighs 55.845 g/mol and it contains 6.022 X 10 23 of atoms
And how many atoms will be there in 3.1 X 10-21g of Fe?
= 3.1 X 10-21g X 6.022 X 10 23 / 55.845
= 0.33 X 10 2
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