[kaahtivak]

Hi
I really need to knw how do to convert μmol/L  into μg/L ? I have looked everywhere can't find it. If possible give an example.
Thanks
Kav

[Borek]

You have to know your substance - you can't convert moles/mass without knowing molar mass. For general conversion ideas google dimensional analysis.

[kaahtivak]

Yeah it is the measurement for silicon. Thak You

[JGK]

silicon has a molecular weight of 14

a 1 molar solution is 14 g of silicon in 1 litre which is a concentration of  (wt/Volume)
14 g/L = 0.014 g/mL

So 1 M = 0.014g/mL or 14 mg/mL
1 mM = 0.000014 g/mL = 0.014 mg/mL = 14 µg/mL
1 µM =0.00000014 g/mL = 0.000014 µg/mL = 0.014 µg/mL

therefore to convert µM to µg/mL multiply by 0.014

it ain't rocket science

[sjb]

silicon has a molecular weight of 14

Wrong, but the calculation principle is right (at least, apart from the second µ in the last line).

See e.g. http://en.wikipedia.org/w/index.php?title=Silicon&oldid=203639537

[JGK]

silicon has a molecular weight of 28

a 1 molar solution is 28 g of silicon in 1 litre which is a concentration of  (wt/Volume)
14 g/L = 0.028 g/mL

So 1 M = 0.028 g/mL or 28 mg/mL
1 mM = 0.000028 g/mL = 0.028 mg/mL = 28 µg/mL
1 µM =0.00000028 g/mL = 0.000028 mg/mL = 0.028 µg/mL

therefore to convert µM to µg/mL multiply by 0.028

it ain't rocket science

Corrected, obviusly rocket science was beyond even me when I sent that one out 

[Valdorod]

Rocket Science

Conversions

MARS CLIMATE ORBITER

120 million dollars waisted because rocket scientists at NASA could not do conversions

 

Valdo

[The Roseate Spoonbill]

μmol/L*(x/μmol) = μg/L

x = the number of grams per micromole. Just check a decnet periodic table. and then multiply by a million.