Question

what is the percent by volume of isopropyl alcohol in a solution that contains 50ml of isopropyl alcohol in 2.2ml of water

Answer 1

Explanation:

If you find only 91% isopropyl alcohol available buy it and dilute it to 70%, because the 30% water makes it more effective at killing virus. The simple way to do this is to add 0.3 part water (three tenths) to one part 91% alcohol.