Question

30 г речовини розчинили у 120 г води. Обчисли масову частку речовини (%) у розчині.​

Answer 1

Объяснение:

вроде так , это верно как по мне

Answer 2

Calculation of Mass Fraction of Substance in Solution

To calculate the mass fraction of a substance in a solution, we need to know the mass of the substance and the total mass of the solution. In this case, we have 30 g of substance dissolved in 120 g of water.

The mass fraction of the substance can be calculated using the formula:

Mass Fraction (%) = (Mass of Substance / Total Mass of Solution) * 100

Substituting the given values into the formula:

Mass Fraction (%) = (30 g / 120 g) * 100

Simplifying the calculation:

Mass Fraction (%) = 0.25 * 100

Mass Fraction (%) = 25%

Therefore, the mass fraction of the substance in the solution is 25%.