Question

Смешали 72 г пятипроцентного раствора соли и 48 г пятнадцатипроцентного раствора найти процентное содержание соли в полученном растворе ответ 9 но решения не знаю помогите пожалуйста!!

Answer 1

1) найдем сколько соли в первом растворе 72*0,05=3,6г
2) найдем сколько соли во втором растворе 48*0,15=7,2г
3) сколько всего получилось раствора после смешивания двух растворов 72+48=120г
4) значит новый процент содержания соли в новом растворе (3,6+7,2)/120=10,8/120=0,09

Ответ 9%

Answer 2

Calculating the Percentage of Salt in the Solution

To find the percentage of salt in the resulting solution, we can use the following formula:

Percentage of salt = (Total weight of salt / Total weight of solution) * 100

Given: - 72 g of 5% salt solution - 48 g of 15% salt solution

Let's calculate the percentage of salt in the resulting solution using the provided information.

Calculation

First, we need to find the total weight of the resulting solution: - Total weight = 72 g + 48 g = 120 g

Next, we calculate the total weight of salt in the resulting solution: - Total weight of salt = (72 g * 5%) + (48 g * 15%) = 3.6 g + 7.2 g = 10.8 g

Now, we can calculate the percentage of salt in the resulting solution: - Percentage of salt = (10.8 g / 120 g) * 100 = 9%

Answer

The percentage of salt in the resulting solution is 9%.

I hope this helps! If you have any further questions or need additional assistance, feel free to ask.