State whether the following statement is true or false:
Mass of two moles of atoms or molecules is called molar mass.

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(B) The statement is False.
Molar mass is defined as the mass of one mole of a substance (atoms or molecules) expressed in grams.
It is the mass of $6.022 \times 10^{23}$ particles of that substance.
Therefore,the mass of two moles would be twice the molar mass,not the molar mass itself.

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