JEE Main Chemistry question
How many mL of a solution of concentration 100 mg Co per mL is needed to prepare 10 mL of a solution of concentration 20 mg Co per mL?
Answer: 2
Solution
By mass conservation, , so mL.
How many mL of a solution of concentration 100 mg Co per mL is needed to prepare 10 mL of a solution of concentration 20 mg Co per mL?
By mass conservation, , so mL.