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# How many moles are there in 28 grams of ##CO_2##?

28 grams of ##CO_2## is equivalent to 0.64 moles of ##CO_2##

You divide the given amount by the Gram Formula Mass (Molar Mass) of ##CO_2##.

The Gram Formula Mass for ##CO_2## is the combined masses of the individual components of the compound.

12 g/mol (for Carbon) and 32 g/mol (for the two Oxygens) for a total of 44 g/mol.

28 g / 44 g/mol = 0.64 mol of ##CO_2##