Respuesta :

meerkat18
The molar mass of the Carbon-12 from the periodic table is given to be 12.011 g. Multiply this mass with the number of moles given.
                         (0.25 moles) x (12.011 g / mole) = 3 g
Thus, the mass of 0.25 moles of carbon-12 is 3 g. 

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