Question

1. If a doctor prescribed to a patient a 10 cc dose of Milk of Magnesia, how many fluid ounces would be needed for 12 doses? Useful conversion 30 mL = 1 fl oz?

2. If a beverage has a density of 1.45 g/mL, how many kilograms are in 750 mL of the beverage?

3. If a liquid has a density of 1.29 g/mL, how many L of the liquid would you measure out if you needed 78 g of the liquid?

4.What is the density (in grams / mL) of a solution if 655 mL has a mass of 250 grams?

Answer 1

1 dose = 10 mL milk of magnesia

12 dosed = 12 x 10 = 120 ml

30 mL = 1 fl oz

1 mL = 0.033 fl oz

120 mL = 120 x 0.033 = 4 fl oz

number of fluid ounces = 4 fl oz

2)

density = 1.45 g/mL

volume = 750 mL

mass = density x volume

         = 1.45 x 750

         = 1087.5 g

mass = 1.09 kg

3)

density = 1.29 g /mL

mass = 78 g

density = mass / volume

1.29 = 78 / volume

volume = 60.46 mL

volume = 0.0605 L

4)

density = 250 / 655 = 0.382

density = 0.382 g/mL