The solution consists of two components: water weighing 45 grams and a substance weighing 5 grams.
The mass of the solution is equal to the sum of their masses:
m solution = 45 + 5 = 50 grams.
To find the mass fraction of salt, we divide the mass of the substance by the mass of the solution:
C = m substance / m solution = 5/50 = 0.1 = 10%;
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.