Question

a 0.500 M. solution is to be diluted to 500.0 mL of a 0.150 M soulution. How many mL of the 0.500 M solution are required

Answer 1

Http://www.wasatch.edu/cms/lib/UT01000315/Centricity/Domain/647/dilution%20problems%20answers.pdf it would be question 5 if you can read it.