how to find the number of nitrogen atoms present in 1.5 moles of nitrogen

From mole concept we know that 1 mole of any substance = 6.022 × 1023 atoms
1.5 mole of nitrogen = 1.5×6.022 × 1023 atoms
                                 = 9.033 × 1023 atoms   
                   
Thus, 1.5 mole of nitrogen contains 9.033 × 1023 atoms .

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as we knoe 1 mole of nitrogen = 6.022 *1023 atoms of nitrogen

and 1 mole of atom -14g

so 1.5 mole of atom =14 *1.5=21 g

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