1 Needed: 50 mls of a 2% HCL solution. There is a concentrated stock bottle of 38% HCL. What volume of the concentrated HCL do you need to make the 2%? How do you make the solution. 2 you need to run an assay tube using 200 copies of the virus. The stock is 2 X 10^3 copies/mL. The tube needs 100 uLs to run the assay. Do you need to dilute the stock virus in order to add 200 copies/100 uL to the assay tube? If so how much? 3 You need to use a virus at 1 X 10^2 copies/mL. The stock virus is 3.6 X 10^5 copies/mL. What is the best way to dilute the stock virus?]