Please somebody help with Math:
1)5% w/v solution of phenol is diluted by adding 200ml to 4 liters water. What is the strength of the final product?
2)The concentration of codeine in cough syrup is 65mg/30ml. How many ml of diluent should be added to 120 ml of this syrup to obtain a pediatric dos of 1mg/ml?
3)What is the new strength of a solution prepared by diluting with water , 1 pint of a 1:750 strength solution to i gallon?
A)) A patient has bradyarrythmia. Choose the drug which will not worsen pt condition?
a)verapamil
b)sotalol
c)digoxin
d)amlodipine
e)Diltiazem.