An I.V. solution contains 9.0 mg of sodium chloride per mL.
The I.V. solution is being administered at a rate of 1.5 mL per minute.
How many grams of sodium chloride would a patient receive in 4.5 hours

Question

An I.V. solution contains 9.0 mg of sodium chloride per mL.  
The I.V. solution is being administered at a rate of 1.5 mL per minute.  
How many grams of sodium chloride would a patient receive in 4.5 hours

anonymous · Answer

9.0mg * 1g/1000mg * 1.5mL/minute * 60minutes/hour * 4.5hours should be what you/re looking for.

xishem · Answer

$$\frac{9.0mg(NaCl)}{1mL(NaCl)}*\frac{1.5mL(NaCl)}{1\min}*\frac{60\min}{1hr}*\frac{1g(NaCl)}{1000mg(NaCl)}*\frac{4.5hr}{1}=3.6g(NaCl)$$

anonymous · Answer

why can you go 1ml/9.0mg? And where did you get the 1 underneath 4.5gr?

anonymous · Answer

cant*

xishem · Answer

Because there are 9.0mg of NaCl PER mL of solution.

The one means nothing. It's just to make it more readable.

xishem · Answer

Sorry. To answer your first question, you can use 1mL/9.0mg. I just chose the reciprocal. You will get the same answer either way if you follow the units.