Two solutions of different concentrations of acid are mixed creating 40 ml of a solution that is 32% acid. one quarter of the solutio is made up of a 20% acid solution . the remaining three-quarters is made up of a solution of unknown concentration , c which equation can be used to determine c, the unknown concentration

10(0.2) + 30C = 40(0.32)

Step-by-step explanation:

Total solution = 40ml with 32% acid.

One quarter of 40 ml is 10 ml, which is 20% acid.

Three quarter of 40 ml is 30 ml, which is C% acid.

Now let's form the equation.

10 of 20% + 30 of c = 40 of 32%       [20% = 0.2 ; 32% = 0.32]

10(0.2) + 30C = 40(0.32)

When we simplify we get

2 + 30C = 12.8

That's it.

Thank you.

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

hope to and hope that my answer is brainliest.(follow me )