Question

Сколько растворенного вещества (г) содержится в 300 г 20% го-раствора Если можно то распишите пожалуйста (Дано,решение(с формулой)) Буду очень благодарна

Answer 1

Дано:
m(р-ра) = 300 г    W(в-ва) = m(в-ва) / m(р-ра)  *100%
W(в-ва) = 20%     m(в-ва) = W(в-ва) * m(р-ра)  /100% 
Найти:                 m(в-ва) = 20 * 300 / 100 = 60 г
m(в-ва)

Answer 2

Calculating the Amount of Solute in a Solution

To calculate the amount of solute in a solution, we can use the formula:

Amount of Solute = (Percentage of Solute / 100) * Total Mass of Solution

In this case, we have a 20% solution and want to find out how much solute is present in 300g of the solution.

Calculation

Using the formula, we can calculate the amount of solute as follows:

Amount of Solute = (20 / 100) * 300g

Amount of Solute = 0.20 * 300g

Amount of Solute = 60g

So, there are 60 grams of solute in 300 grams of a 20% solution.