v1 x c1= v2 x c2?

Question

i need to find the concentration of a X in nmol/ml, i know i have to use v1x c1 = v2x c2 but not sure about my v1 which is 150 micromoles (um) do i habe to convert the micromoles? if so how?

Answer 1

When V1, V2 are expressed in the same units,
you will find C2 in the same units that you have for C1.

You say that V1=150 umole which makes no sense since V is volume and C is concentration (something per volume unit)
What is your volume unit?

If you meant that C1= 150 umole/ml and you need C2 expressed in nmole/ml then you need to convert it.
1 umole= 10^3 nmole
so C1=150*10^3 nmole/ml

If you meant that C1= 150 umole/L, then it is
C1=150*10^3 nmole/10^3 ml= 150 nmole/ml

please clarify your numbers and units.

Answer 2

If the sum asks u to find c2,given the values of v1,c1,v2....

If v1 and v2 are having the same units ,no need to convert and c2 will have same unit as c1
BUT if I am not mistaken,conserving equivalence,
n1v1=n2v2
So c1v1*v1=c2v2*v2
or am I wrong?