10. Order: As pre-op, give morphine 8 milligrams Have:Morphine grain = (1)/(6) in 2 milliliters Morphine grain Give: __

## Step 1: Convert grains to milligrams### We know that 1 grain is equal to 60 milligrams (approximation commonly used in medicine). The available morphine is grain per 2 mL. Therefore, the concentration is mg per 2 mL, which simplifies to 10 mg per 2 mL.## Step 2: Calculate the required volume### We need to administer 8 mg of morphine. Since the concentration is 10 mg per 2 mL, we can set up a proportion: . Solving for , we get mL.