Question

1. В 45 г воды растворили 5 г соли. Вычислить массовую долю соли в растворе.

Answer 1

Ответ: 9 г

Объяснение: потрібно 45 поділити на 5 і знайдемомасу солі в розчині

Answer 2

Ответ:

45+5=50 (г) раствора

Массовая доля соли= 5*100:50=10%

Объяснение:

Answer 3

Calculating the Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution, we can use the formula:

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

Given: - Mass of water (H2O) = 45 g - Mass of salt (NaCl) = 5 g

Using the given formula, we can calculate the mass fraction of salt in the solution.

Calculations: - Mass Fraction (w%) = (5 g / (45 g + 5 g)) * 100% - Mass Fraction (w%) = (5 g / 50 g) * 100% - Mass Fraction (w%) = (0.1) * 100% - Mass Fraction (w%) = 10%

Therefore, the mass fraction of salt in the solution is 10%.