1.Show calculations for weighing 30 mg of drug on a prescription balance with a sensitivity requirement of 6 mg. The potential error in weighing should not be more than 5%.

2.You received a prescription to fill 6 capsules, each containing 10 mg of oxycodone. How would you weigh the oxycodone for this prescription on a balance having a sensitivity requirement of 10 mg with no more than 5% error?

3.  A formulation scientist needs to weigh 2 mg of a flavoring agent with no more than 0.5% error. His laboratory has a balance with a sensitivity requirement of 100 mcg. Calculate the amount of lactose required to fulfill the minimum weighable quantity requirement of 2 mg for the flavoring agent.

4.  A pharmacist has on hand 100-mg topiramate tablets, each weighing 325 mg. How much tablet powder and microcrystalline cellulose (diluent) should be used in preparing 16 divided powders, each containing 25 mg of topiramate/packet and weighing 250 mg?