Emilie T. answered • 06/23/15

Tutor

2
(1)
College Graduate for K-12, Lower Division College

First we find out how many total milliliters we have of the final solution:

50ml + 30ml = 80 total ml

Then we find out how many of those milliliters are hydrogen peroxide:

.03(50ml) + .12(30ml) = 5.1 ml of hydrogen peroxide

Then we just divide to find the new concentration:

5.1 / 80 = 0.06375 = 6.4% (rounded)