Answer:
The total mass of insulin in the bottle is 6500 mg
Explanation:
The formula of concentration is:
[tex]Concentration =\frac{mass}{volume}[/tex]
Clearing out the mass we have:
Mass = concentration x volume
Replacing the values:
Mass = (20.0 mg/mL) (325 mL) = 6500 mg
Note that the units are cancelled.
So, there are 6500 mg or 6.5 g of insulin in the bottle