7​. If 60 ml of water contains 12% of chlorine, how much water must be added in

order to create a 8% chlorine solution?

3 answers

mL1 x %1 = mL2 x %2
60 x 0.12 = mL2 x 8
mL2 is TOTAL. You already had 60. So you must add ______?
50
30 ml