Question

What is the final concentration of 50.0 mL of a 2.00M solution, diluted to 500.0 mL?

Answer 1

`"Concentration"="Moles of stuff"/"Volume of solution"` `=` `0.20*mol*L^-1`

Explanation:

`(50.0xx10^(-3)cancel(L)xx2.00*mol*cancel(L^-1))/(500.0xx10^-3*L)` `=` `??mol*L^-1`

Note that the answer is reasonable. If you read the question you have diluted the starting solution from `50.0*mL` to `500.0*mL`, a tenfold dilution, so the final solution shoould be `10xx` as dilute.