Answer
$$28.4 mols CO_{2}$$
Work Step by Step
Convert kilograms into grams. Then use molar mass to convert grams into moles.
$1.25 g CO_{2}\times\frac{1000 g CO_2}{1 kg CO_2}\times\frac{1 mol CO_{2}}{44.0095 g CO_{2}}=28.4 mol CO_{2}.$
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