Homework Answers
here,
number of atoms = 5.27 *10^24
number of moles = number of atoms/NA
number of moles = 5.27 *10^24/(6.022 *10^23)
number of moles = 8.75
molecular mass = total mass/number of moles
molecular mass = 140/8.75
molecular mass = 16
as the molecular mass is 16, the element is Oxygen
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