how do you solve this problem??? HELP

[jack604]

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How many cubic centimeters of the antibiotic are needed for 12 injuections of 24 mg each?

man i feel dumb
Help guys

 

[Jo23]

are you sure those 24 are mg and not ml?

 

[jack604]

i think so
there might be an error on the question though.
not sure

 

[The Musketeer]

Originally posted by jack604
How many cubic centimeters of the antibiotic are needed for 12 injuections of 24 mg each?

man i feel dumb
Help guys

I believe that should be 24 mL, if it is mg, you have to memorize the conversion rate between g and mL (which I don't have off hand), so because 1 cubic centimeter = 1 mL:

12*24=288 cubic centimeters (hopefully you have this answer as one of the choices)

 

[trypmo]

Originally posted by jack604
How many cubic centimeters of the antibiotic are needed for 12 injuections of 24 mg each?

man i feel dumb
Help guys

If it does say mg and not ml:

1) The antibiotic is being given by injection, therefore is in a liquid state.
2) They don't give you the mass density of the antibiotic solution.
3) Knowing the mass density of an antibiotic (esp. without telling you which one) off the top of your head is something they can't require you to do.
4) Water weighs 1 g/ml, and this they could expect you to know.
5) Therefore, you can conclude that they must expect you to use water's density.
6) Therefore, it's got to be a typo (they must've meant g not mg), so just substitute ml for mg and you're set.

HTH!