Answer : 0.14 mL of sterile water should be added to 700 mg of kanamycin.
Explanation : We know that 5 mL of sterile water has to be added to 1 gram of kanamycin so we have to find for 700 mg;
We can use the comparison formula here, where the unknown volume of sterile water in mL can be calculated;
700 mg / (1000 mg X 5 mL) = 0.14 mL
Hence, 0.14 mL will be added to 700 mg of karamycin.