Buffers are usually of three types: Acidic buffers: They consist of a weak acid and its salt of a strong base. Th â¦ ey keep the pH constant in the acidic range.Basic buffers: They consist of a weak base and its salt of a strong acid.
I always go with SPF 50+. But, to be honest, there is not *that* much difference on a daily basis from SPF 25 to SPF 50: To figure out your level of protection, divide 1 by the SPF number.That equals the percentage of rays that are allowed to pass through. So SPF 25: 1/25 = 4% of rays pass through.SPF 50 = 1/50 = 2% of rays pass through. always go with SPF 50+. But, to be honest, there is not *that* much difference on a daily basis from SPF 25 to SPF 50: To figure out your level of protection, divide 1 by the SPF number.
How do you write 250 percent as a fraction or mixed number in simplest form? 250% = 250/100 = 2.5 So as a fraction it is 250/100 which can then be simplified to 5/2 by dividing both top and bottom by 50.As a mixed number we would write 5/2 as 2 1/2.50 as a fraction would appear as 250/1. Any whole number as a fraction is equal to that number over 1. For example, as a fraction - 1=1/1 2=2/1 3=3/1 etc... If y â¦ ou meant to type a decimal point (.250), then the answer is 1/4. 3 people found this useful.