Q1xc1=q2xc2 pharmacy calculations help?

q1=intitial quantity c1=stock solution q2=final quantity volume c2=final concentration expressed as a percentage,does any one know of a good math site that is free ?

Answer:
i still don´t get why u need a math site-
u have the formula, just punch in the numbers?
try here
http://www2.wwnorton.com/college/chemist...
What is your question?

This is a simple dilution equation.

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