units of concentration

[tolga]

How do a covert 0.7mg/100ml to mg/100g

[kenhung123]

direct conversion mg/ml=mg/g

[the.watchman]

Remember, 1mL = 1cm x 1cm x 1cm = 1g

Actually, does this hold for all substances?

[appianway]

Nope. Other substances have different densities.

[the.watchman]

Nope. Other substances have different densities.

That's what I thought

[kenhung123]

Well from what he has given you can assume that it can be directly converted.

[appianway]

I'd presume that the 100mL refers to 100mL of water, so instead of writing 0.7mg/100mL H20 you write 0.7mg/100g H20.

Althought the density of water would presumably change with temperature anyway.