2
Explanation
To convert units, construct a fraction that is equal to 1, multiply the original measurement by that fraction, and simplify.
we need to know the equivalence, in this case
[tex]1000\text{ mg= 1 g}[/tex]as we need to convert form mg to g, we need to cancel the ( mg) units, so the fraction we need will have mg in the denominatror
[tex]\frac{1\text{ g}}{1000\text{ mg}}=1[/tex]Now, just mutlply the given measure by the fraction ( check we are multiplying by 1, so we are not afffecting the amount)
hence
[tex]2000\text{ mg (}\frac{1\text{ g}}{1000\text{ mg}})=2\text{ g}[/tex]therefore the answer is 2g
I hope this helps you