Answer:
Washing hands with soap and water. Sanitizers are only used if there is no soap and water.
I think A. o2 is oxygen, h202 is a clear liquid like bleach, And H20 is water lol :P
So visualize soil mixed with water. To separate it, you can use a sieve to filter the water.
Finding the variables in the experiment or study and measurinf
Good laboratory technique demands clean glassware because the most carefully executed piece of work may give an erroneous result if dirty glassware is used. In all instances, glassware must be physically and chemically clean and in many cases, it must be bacteriologic-ally clean or sterile.
