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Question

Find the number of oxygen atoms in 10 millimnoles of [Fe(H2O)5NO]SO4.
  1. 0.01 NA
  2. NA
  3. 10 NA
  4. 0.1 NA


Solution

The correct option is D 0.1 NA
Number of O-atoms in one formula unit of [Fe(H2O)5NO]SO4=10

Therefore, number of O-atoms in one mole of [Fe(H2O)5NO]SO4=10 NA

So, number of O-atoms in 10 millimoles of [Fe(H2O)5NO]SO4
=10×103×10 NA
=0.1 NA

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