Answer :

3.011 X 1023 number of N atoms.


As we know that 1 mole = 6.022 X 1023atoms



1/2 mole = 0.5 mole


For 0.5 mole of Natoms


First, we apply the formula:



Mass of Natoms = No. of moles × Molar mass of N


Mass of Natoms = 0.5 mole × (atomic mass of nitrogen)


Mass of Natoms = 0.5 × 14


Mass of N atoms = 7g


Thus, mass of 3.011 × 1023 number of N atoms is 7g


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