(11) How many grams of 5% ichthammol ointment can be made from 5 lbs. of
15% ichthammol ointment?
(12) How many 30 gram tubes can be filled from 5 lbs. of 10% ammoniated
mercury ointment after it has been diluted to 3% in strength?
Prepare from 5% ammoniated mercury ointment. How much of the 5% ointment
and how much of the diluent (petrolatum) should be used in compounding the Rx ?
(14) How many milliliters of 95% alcohol should be used in preparing the 70%
alcohol needed for this preparation?