Answer
$ 0.0023\ kg$
$2265\ mg$
Work Step by Step
We use stoichiometry, making sure that all units cancel out to $kg$, to obtain:
$2.265\ g \times 1\ kg/1000\ g = 0.0023\ kg$
We use stoichiometry, making sure that all units cancel out to $mg$, to obtain:
$2.265\ g \times 1000\ mg/g = 2265\ mg$
