Сколько граммов сахара нужно добавить в 60г 5% раствора , чтобы он стал 12%

To calculate the amount of sugar to add, we need to find the difference in the sugar concentration between the initial solution and the desired solution.

Initial concentration of sugar in the solution: 5% Desired concentration of sugar in the solution: 12%

The difference in concentration is: 12% - 5% = 7%

To calculate the amount of sugar needed, we use the following formula:

(Desired concentration / Initial concentration) * Initial amount = Amount of sugar needed

(12% / 5%) * 60г = 144г

Therefore, you need to add 144г of sugar to the 60г 5% solution to make it a 12% solution.