Calculations Questions

Hi, I was given this question as a practice example. I'm a wee bit rusty. Could someone help me with this one.
You are required to give 300 micrograms. The ampoule contains 1:5000 solution in five mls. How much are you going to give?. Would someone kindly set this out step by step. A angel prehaps. I already know 1: 5000 is 1 gram in 5000 mls. Do I need to convert the 300 to grams? 

Feb 5, '07You are asked to give 20 grams iv. You have a bottle of 5%. What volume are you going to infuse?
5% = 5 grams per 100mls. Going infuse 400 mls. Is that right? Thanks for any help:Melody: 
Feb 6, '07Hi, Everyone. I have this example questiondrug calculation. Could someone shed some light on itthe steps of working it out.
You are required to give 300 micrograms.
The ampoule contains 1: 5000 in 5mls.
How much are you going to give?
The answer I got was 0.3 ml.
I first converted 300 micrograms to grams.
1: 5000 = 1gram in 1000mls so the answer is 5 grams.
300 divided by 1000 = 0.3
0.3 times 5 = 1.5
1.5 divided by 5=0.3
Is this correctI need some guidence. 
Feb 6, '07Hello, beetle and welcome to allnurses.com
I moved your posts to the Nursing Student Assistance forum for a better response.
Enjoy the site. 
Feb 6, '07hi,beetle!
you are required to give 300 micrograms. the ampoule contains 1:5000 solution in five mls. how much are you going to give?
i may be a little rusty on this, but i do believe that the 1:5000 ratio means that 5 ml of solution contains 1 mg of drug (or there is 1 gram of solid in 5 liters of liquid), not 1 gram per 5ml. someone please correct me if i am wrong about this. therefore:5 ml/1 mg (dose on hand) x 1 mg/1000 mcg (conversion factor) x 300 mcg/1 (dose desired) = 1.5 ml (amount to give)you are asked to give 20 grams iv. you have a bottle of 5%. what volume are you going to infuse?
please check out the nursing student forums on allnurses. here is a listing of them: http://allnurses.com/forums/f196/. you will find questions on drug calculations answered on the nursing student assistance and general nursing student discussion forums. welcome to allnurses! 
Feb 6, '07hey all, dunno if this will help but i use the equation  what you have want divided by what you have got x what it is in.