FOR NUMBER 1 In this time of pandemic, knowing the ability of your hand sanitizer to kill bacteria and viruses is important. You bought a 150-mL hand sanitizer (solution) which is labeled 70% ethyl alcohol by volume, what is the volume of ethyl alcohol (solute) in it?
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70% percent of alcohol is ideal to a stronger solution. Pure alcohol coagulates protein in contact. If 70 percent of alcohol is poured to a single celled organism, the diluted alcohol also coagulates the protein, but at a slower rate, so that it penetrates all the way through the cell before coagulation can block it.