Question

How much of other chemicals must be evaporated from 400 grams of a hand sanitizer that is 24% alcohol to strengthen it to a hand sanitizer that is 30% alcohol

Answer 1

Step-by-step explanation:

1 cup rubbing alcohol of at least 70% alcohol concentration. Again, the World Health Organization says hand-washing with soap and water is the best way to clean your hands

Answer 2

If 24% of alcohol is in 400grams it means other chemicals is 76%

24%400=96

Then 76%400=304

But alcohol increased to 30% which means other chemicals decreased by 6%

Therefore to find the amount of chemical that must be evaporated, subtract 6%from 76% which will give you 70%..

Multiple the 70% by 400 grams to get the amount of other chemicals that must be evaporated..

70% of 400=24

Therefore 24 grams of other chemicals must be evaporated to get 30% alcohol of hand sanitizer