A sample of seawater contains 0.000245 g of sodium chloride per mL of solution. How much sodium chloride is contained in 50.0 mL of this solution?
Using Dimensional Analysis we can set up the correct equation to find the desired result. If we want mass (grams) from a concentration and volume it is this:
This is basically a density problem, where the density is known:
In this question, the mass of
To find mass when density and volume are known, we can rearrange the density formula to isolate mass.
Plug in the known values and solve for mass.