Question

PLSSSS

How much water do I need to add
to l liters of pure alcohol to obtain a
solution of 45% alcohol?

Answer 1

Explanation:

450cm of water is needed for it to be

Answer 2

If you add 690 ml of water you will obtain 1.690 liter of 70% alcohol. Of course if you halve the amounts, e.g. 0.5 liter 75% alcohol and 345 ml of water, you will also obtain 45% alcohol solution.