can anyone solve these problems?
1. For children, streptomycin is to be administered at a dose of 30mg/kf of body weight daily in divided doses every 6 to 12 hours. The dry powder is dissolved by adding water for injection, in an amount to yield the desired concentration as indicated in the following table(for a 1-gram vial)
Approximate conc(mg/ml) ----volume(ml)
200----------------------------------- 4.2
250 ----------------------------------3.2
400 ---------------------------------1.8
reconstituting at the lowest possible concentration, what volume (ml) would be withdrawn to obtain one days dose for a 50 pound child?
2. how many milliosmoles of calcium chloride(cacl2.2H2O mol wt=147) are represented in 147 ml of a 10%w/v calcium chloride solution?
3. how many gms of talc should be added to 1 lb of a powder containing 20 gm of zinc undecylenate per 100 gm to reduce the concentration of zinc undecylenate to 3 %?