Another 12 g of the same substance was dissolved in 120 ml (= 1.2 g / ml) of a 15% solution of the substance.
| December 10, 2020 | education
Another 12 g of the same substance was dissolved in 120 ml (= 1.2 g / ml) of a 15% solution of the substance. The mass fraction of the substance in the newly obtained solution is (in%)
solution mass = V * P = 120ml * 1.2 = 144 g
mass of pure substance 144 * 0.15 = 21.6 g
mass fraction = (21.6 + 12) 🙁 144 + 12) = 0.22
22 percent answer
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
