Answer:
80 g
Step-by-step explanation:
mass of sanitizer = 400 g
percentage of alcohol = 24%
mass of alcohol in the sanitizer = 24% of 400 g = 0.24 x 400 = 96 g
this means that the mass of other chemicals = 400 - 96 = 304 g
If alcohol content is increased to 30% by removing more of the other chemicals, then mass of alcohol will still remain 96 g
this means that 96 g becomes 30% of the resulting hand sanitizer, we write mathematically as
96 g = 30% of y
where y is the new mass of the sanitizer
96 = 0.3y
y = 96/0.3 = 320 g
The remaining mass of other chemicals = 320 - 96 = 224 g
the total mass of other chemical lost is
304 - 224 = 80 g
