re drug calculation, how do you express 75 grams within 500 mls as a % solution?

% solutions are #grams per 100 mL.
So 75 grams in 500 mLs would be:
>>>There are 5 x 100mL
>>> 75/5 = 15
Your solution is a 15% solution.
buy a nurses multiplication book and work it out
The first answer is correct assuming that the 500mls refers to the volume AFTER you have added the drug. Otherwise, it would be more approaching a 13% solution.
1 g per ml is 100% w/v (weight per volume).
75g/500ml * 100 = ahh I don't have a calculator %
weight/ volume * 100.
Mmm
Notice that you can with the sole purpose make this operation exact, if you are working beside water solutions, beacause amls of wet weights exactly 1 gram (under normal conditions of temp. and pressure)
Then if is the crust, the solution you want has 575 grams of total mass, so the percent of thew solid is: 75 *100/575 =13.04347826086956521739130434. more or smaller quantity
75 mg in 500 mL, by dividing both by 5, translates to 15 mg per 100 mL.
% solution is % w/v and is grams/100 mL.
So 15 mg/100 mL is 0.015 g/100 mL or 0.015% w/v
Please see the webpage for more details on Concentration (Molarity).
divide it by 5, and you own a percentage