A) Explain how do you make 200mL of a 0.1 M solution of a substance that has a molecular weight of 121.1 g/mol?
B) If you take 10mL of the solution you made in A add 90 mL of water, mix and then take 5mL of the mixture and bring it to 25 mL, Explain what will be the concentration of the final solution in molars, millimolars and micromolars?