I can not figure out this problem

te of M is 16. I can not figure out, if a is 1 or unknown.

formula online to help.. It should be a simple straightforward problem but i just can not for the life of me figure it out. are you able to provide me with a formula or point me in the right direction? The problem is: Solution A has a 50% concentration Solution B has a 100% concentration Solution C has a 5% concentration you have 5L of each solution to utilize as well as unlimited quantities of water to dilute solution concentrations if needed. Part A Make a final solution of 100ml with solution concentrations of Solution A 15%, solution C 5% and solution C 80%. how much of each solution will you need to make your final 100ml solution? Part B using the above solutions how many 100ml final solutions can you produce with the 5L volumes? No matter how I work it i can't make the solution to the correct concentrations. Thank you for your help. John

formula online to help.. It should be a simple straightforward problem but i just can not for the life of me figure it out. are you able to provide me with a formula or point me in the right direction? The problem is: Solution A has a 50% concentration Solution B has a 100% concentration Solution C has a 5% concentration you have 5L of each solution to utilize as well as unlimited quantities of water to dilute solution concentrations if needed. Part A Make a final solution of 100ml with solution concentrations of Solution A 15%, solution C 5% and solution C 80%. how much of each solution will you need to make your final 100ml solution? Part B using the above solutions how many 100ml final solutions can you produce with the 5L volumes? No matter how I work it i can't make the solution to the correct concentrations. Thank you for your help. John