Question

масса сплава из меди и олова 720г .Отношение массы меди к массе олова равно 7 :5 сколько грамов меди и сколько олова содержитсЯ в сплаве

Answer 1

Ответ: 420; 300г

Пошаговое объяснение:

Примем массу меди за 7 частей, массу олова за 5 частей.

Составим уравнение:

7+5=12 частей составляет сплав меди и олова.

Находим массу сплава, которая приходится на одну часть:

720/12=60г

Находим сколько меди в сплаве:

60*7=420г

Находим сколько олова в сплаве:

60*5=300г

Answer 2

Calculation of Copper and Tin Content in the Alloy

To calculate the amount of copper and tin in the alloy, we need to use the given information about the mass ratio of copper to tin.

The mass ratio of copper to tin is given as 7:5. This means that for every 7 grams of copper, there are 5 grams of tin in the alloy.

Let's assume the mass of copper in the alloy is x grams.

According to the mass ratio, the mass of tin in the alloy would be (5/7)x grams.

We are given that the total mass of the alloy is 720 grams.

So, we can set up the following equation to solve for x:

x + (5/7)x = 720

Simplifying the equation:

(12/7)x = 720

Now, we can solve for x:

x = (720 * 7) / 12

Calculating the value of x:

x ≈ 420 grams

Therefore, the alloy contains approximately 420 grams of copper and (5/7) * 420 ≈ 300 grams of tin.

So, the alloy contains approximately 420 grams of copper and 300 grams of tin.

Please note that the above calculation assumes that the alloy is made up of only copper and tin, and there are no impurities present.