Nitrogen molecules in 1.4 moles of n2

molecules

Explanation:

As per Avogadro's constant for atoms, one mole of an element/compound consists of atoms/molecules.

Thus, the number of molecules in “n” moles of an element and compound  is equal to the product of number of moles of the element and compound and  Avogadro's constant.

Thus, 1.4 moles of will have  

molecules

molecules

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