0731. Решение задачки по химии

4. A steel sample contains 0.05% manganese. What sample of steel should be dissolved in 100 ml so that, by taking 25 ml of this solution into a 50 ml flask, a color corresponding in intensity to the color of a solution containing 0.25 mg of manganese in 50 ml of solution is obtained?

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.