Which statement is true about 0.25 mole of O2 and 0.25 mole of NH3 ?

A.There are more O2 molecules.
B.There are more NH3 molecules.
C.They both have the same number of molecules.
D.They both have the same number of atoms

The MOLE (mol) is a unit of measurement that is the amount of a pure substance containing the same number of chemical units (atoms, molecules etc.) as there are atoms in exactly 12 grams of carbon-12 (i.e., 6.022 X 10²³).

As we know,

1 mole of any substance consist of 6.023 x 10²³ particle irespective of the nature of that substance.

Hence, 0.25 mole of O₂ and 0.25 mole of NH₃ both have the same number of molecules. Thus, Option (C) is correct.

Learn more about mole concept here ;

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Which statement is true about 0.25 mole of O2 and 0.25 mole of NH3 ? A.There are more O2 molecules. B.There are more NH3 molecules. C.They both have the same number of molecules. D.They both have the same number of atoms

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What is Mole concept ?

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Which statement is true about 0.25 mole of O2 and 0.25 mole of NH3 ?

A.There are more O2 molecules.
B.There are more NH3 molecules.
C.They both have the same number of molecules.
D.They both have the same number of atoms