Question

Вычислите массовую долю в % каждого элемента сульфиде меди(2)-CuS

Answer 1

Mr(CuS) = 63,5 + 32 = 95,5

W(Cu) = Ar(Cu) * n / Mr(CuS) *100% = 63,5 * 1 / 95,5 *100% = 66%

W(S) = Ar(S) * n / Mr(CuS) *100% = 32 *1 / 95,5 *100% = 34%

Answer 2

Calculating the Mass Percentage of Each Element in Copper(II) Sulfide (CuS)

To calculate the mass percentage of each element in copper(II) sulfide (CuS), we can use the molar masses of copper (Cu) and sulfur (S) to determine the proportion of each element in the compound.

The molar mass of copper (Cu) is approximately 63.55 g/mol, and the molar mass of sulfur (S) is approximately 32.07 g/mol.

Using these molar masses, we can calculate the mass percentage of each element in copper(II) sulfide (CuS).

Step 1: Calculate the molar mass of CuS The molar mass of CuS can be calculated as follows: ``` Molar mass of CuS = (mass of Cu / molar mass of Cu) + (mass of S / molar mass of S) = (63.55 / 63.55) + (32.07 / 32.07) = 1 + 1 = 2 ```

Step 2: Calculate the mass percentage of each element The mass percentage of each element in CuS can be calculated as follows: - Mass percentage of Cu = (mass of Cu / molar mass of CuS) * 100% - Mass percentage of S = (mass of S / molar mass of CuS) * 100%

Using the calculated molar mass of CuS (2 g/mol), we can proceed to calculate the mass percentage of each element.

Step 3: Calculate the mass percentage of each element - Mass percentage of Cu = (1 / 2) * 100% = 50% - Mass percentage of S = (1 / 2) * 100% = 50%

Therefore, the mass percentage of copper (Cu) in copper(II) sulfide (CuS) is 50%, and the mass percentage of sulfur (S) in copper(II) sulfide (CuS) is 50%.

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