If a drug has a concentration of 400 mg per 10 ml, how many mL are needed to give 1.5 grams of the drug?

We can use the simple ratio of y = mx + b

400mg = 10L (m) + 0

40mg = 1mL

1mL = 40mg

40 (37.5) = 37.5mL

1500mg = 37.5mL

37.5 milliliters of space is required to hold 1.5 grams of material.

This is one way or you could have been smart and used density which is volume = mass/density

10 = 400/density

10 (density) = 400

density = 400/10

density equals 40 mg per mL

1500 = 40 (Volume)

1500/40 = Volume

37.5 = Volume

37.5 milliliters of space is required to hold 1.5 grams of material.