How many o atoms are in 1.25 mol of so2

The number   of  O atoms  that ate in 1.25  mol   of SO2  is  2.5  moles

  calculation

moles of O= total number O atoms in SO2    x  1.25  moles

The number  of  O  atoms in SO2 =   1  x2 = 2 atoms

moles is therefore=   2  x 1.25 moles = 2.5 moles

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