# Conversion help

• Sep 7th 2008, 11:25 AM
Legendsn3verdie
Conversion help
here is the problem i m stuck on.. can someone help me get the answer..
i m really more interested then the work then the answer.

Convert 8.2mg/mL to (micro)g/L
• Sep 7th 2008, 11:53 AM
Matt Westwood
Ooh delightful, a question in metric! That doesn't often happen round here. Full marks to the teacher.

There's 8.2 mg in every mL. There are 1000 mL in each L. So there's 1000 times as many mg in every L as there are in every mL. So multiply the 8.2 by 1000 to get the number of mg in every L.

Then there are 1000 microg in every mg. So there's 8.2 x 1000 microg in every mL. So theres 8.2 x1000 x1000 microg in every L.

Does that help?
• Sep 7th 2008, 12:13 PM
Legendsn3verdie
Quote:

Originally Posted by Matt Westwood
Ooh delightful, a question in metric! That doesn't often happen round here. Full marks to the teacher.

There's 8.2 mg in every mL. There are 1000 mL in each L. So there's 1000 times as many mg in every L as there are in every mL. So multiply the 8.2 by 1000 to get the number of mg in every L.

Then there are 1000 microg in every mg. So there's 8.2 x 1000 microg in every mL. So theres 8.2 x1000 x1000 microg in every L.

Does that help?

not really.. its hard for me to understand it without math.. this is how i do it and i m getting the way wrong answer:

(8.2mg/1ml) x (10^-3 g / 1mg) = .0082g

.0082g/1 ) x ( 1 microg / 10^-6) = 8200

i m way wrong, but u see the way i do it.. can u show me that way how u got ur answeR??
• Sep 7th 2008, 12:15 PM
Jhevon
Quote:

Originally Posted by Legendsn3verdie
not really.. its hard for me to understand it without math.. this is how i do it and i m getting the way wrong answer:

(8.2mg/1ml) x (10^-3 g / 1mg) = .0082g

.0082g/1 ) x ( 1 microg / 10^-6) = 8200

i m way wrong, but u see the way i do it.. can u show me that way how u got ur answeR??

one of them is doing exactly as Matt pointed out, but it is set out to look familiar to the method you are using
• Sep 7th 2008, 12:19 PM
Legendsn3verdie
Quote:

Originally Posted by Jhevon

one of them is doing exactly as Matt pointed out, but it is set out to look familiar to the method you are using

yah i understand those easier problems with 1 conversion.. but these problems have a dual conversion it seems to me and i m absolutly lost.
• Sep 7th 2008, 12:28 PM
Jhevon
Quote:

Originally Posted by Legendsn3verdie
yah i understand those easier problems with 1 conversion.. but these problems have a dual conversion it seems to me and i m absolutly lost.

just apply the method twice then. convert to one unit, then use the method again to convert the other
• Sep 7th 2008, 12:52 PM
Legendsn3verdie
Convert 8.2mg/mL to (micro)g/L

ok so convert 82.mg/ml into g/l to mcg/l i duno. can u show me the steps
• Sep 7th 2008, 12:57 PM
Jhevon
Quote:

Originally Posted by Legendsn3verdie
Convert 8.2mg/mL to (micro)g/L

ok so convert 82.mg/ml into g/l to mcg/l i duno. can u show me the steps

1 mg = ? g

and

1 g = ? mcg

also,

1 ml = ? L
• Sep 7th 2008, 01:07 PM
Legendsn3verdie
1 mg = .001 g

1 g = 1000mcg

1 ml = .001 L

right?
• Sep 7th 2008, 01:11 PM
Matt Westwood
Quote:

Originally Posted by Legendsn3verdie
not really.. its hard for me to understand it without math.. this is how i do it and i m getting the way wrong answer:

(8.2mg/1ml) x (10^-3 g / 1mg) = .0082g

.0082g/1 ) x ( 1 microg / 10^-6) = 8200

i m way wrong, but u see the way i do it.. can u show me that way how u got ur answeR??

You've successfully calculated the concentration in microg per mL, but the question calls for microg per L.
• Sep 7th 2008, 01:15 PM
Jhevon
Quote:

Originally Posted by Legendsn3verdie
1 mg = .001 g

1 g = 1000mcg

1 ml = .001 L

right?

no, 1 g = 1000000 micrograms

so that means, wherever you see mg, you can change it to 0.001g. then simplify. then change the g to 1000000 mcg then simplify, then change the ml to 0.001L and simplify, and you are done.

can you show your steps now?
• Sep 7th 2008, 01:21 PM
gyan1010
Convert 8.2mg/mL to (micro)g/L

write it like a grid to solve the conversion problems here.

Code:

```8.2 mg | -------+  1 mL  |```
Then since there is 1000 (mL) in 1 (L) and you need to cancel the (mL), put it on top

Code:

```8.2 mg | 1000 mL | -------+---------+  1 mL  |  1 L  |```
Same for mg to (micro)g. There are 1000 (micro)g in 1 mg. mg goes on bottom to cancel the one already on top.

Code:

```8.2 mg | 1000 mL | 1000 (micro)g | -------+---------+---------------|  1 mL  |  1 L   |    1 mg      |```
The horizontal line is devide and vertical lines become multiply. The mg and mL cancel and the proper units remain in the proper place.
• Sep 7th 2008, 01:44 PM
Legendsn3verdie
yes thank you every1! i got it ! ty alot.

here is what i did:

8.2mg/1mL (1mL / 10^-3 L)(10^-3 g/1 mcg)= 8.2 g/L

8.2g/L (10^6 mcg/1g) = 8.2 x 10^6

is what i did logical? i got the right answer though!
• Sep 7th 2008, 02:50 PM
Jhevon
Quote:

Originally Posted by Legendsn3verdie
yes thank you every1! i got it ! ty alot.

here is what i did:

8.2mg/1mL (1mL / 10^-3 L)(10^-3 g/1 mg)= 8.2 g/L

8.2g/L (10^6 mcg/1g) = 8.2 x 10^6

is what i did logical? i got the right answer though!

yup, that's good

don't forget your units at the end