Math questions on the PTCB (11)

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Math questions on the PTCB practice exams questions and answers. d) 150 - Answer We will use all the information provided. Calculate ml for total course. 1ml x 3 x 10 =30ml Calculate mg total what doctor ordered using proportion. 50mg/ml = Xmg/30ml X=1500mg Calculate ml using stock have using proportion. 125mg/5ml = 1500mg/Xml X=60ml Answer: c) 60 What is the percentage concentration of a solution that contains 500mg/50ml? a) 0.5% b) 1% c) 5% d) 10% % concentration formula: w/v% = ?/? x ? - Answer % concentration formula: w/v% = g/ml x 100 Calculate 500mg = ? g using proportion. 1g/1000mg= Xg/500mg X=0.5g Calculate formula: .5g/50ml x 100 =1% Answer: b) 1% What volume, in milliliters, of a drug for injection 250 mg/10 mL should be used to fill an order for 15 mg? a) 0.6 b) 6 c) 10 d) 16.6 - Answer Calculate using proportion. 250mg/10ml = 15mg/Xml X= .6ml Answer: a) 0.6
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