How many `mL` of a solution of concertration `100 mg Co^(2+)` per `mL` is needed to prepare `10 mL` of a solution of concentration `20 mg Co^(2+)` per `mL`.

Calculate the amount of the water which must be added to 2 ml of a solution of concentration of 40 mg silver nitrate per ml, yield a solution of concentration fo 16 mg silver nitrate per ml?

Calculate the amount of the water which must be added to 2 ml of a solution of concentration of 40 mg silver nitrate per ml, yield a solution of concentration fo 16 mg silver nitrate per ml?

A solution contains 75 mg NaCl per mL . To what extent must it be diluted to give a solution of concentration 15 mg NaCl per mL of solution.

A solution contains 75 mg NaCl per mL . To what extent must it be diluted to give a solution of concentration 15 mg NaCl per mL of solution.

A solution contains 75 mg NaCl per mL . To what extent must it be diluted to give a solution of concentration 15 mg NaCl per mL of solution.

How many mL of 8.00 M HCl are needed to prepare 150 mL of a 1.60 M HCl solution?