Question

Калiй сульфату К2SO4 масою 696 г. А 6 моль В 3 моль В 4 моль Г 2 моль​

Answer 1

Дано:
m(K2SO4)= 696 г
Знайти:
n(K2SO4)-?
Розв’язання :
n= m/M
M(K2SO4)=174 г/моль
n(K2SO4)= 696 г/моль / 174 г= 4 моль
Відповідь : В 4 моль

Answer 2

Chemical Equation and Molar Mass Calculation

To calculate the molar mass of potassium sulfate (K2SO4), we can use the periodic table to find the molar masses of each element and then sum them up.

The molar mass of potassium (K) is approximately 39.10 g/mol, sulfur (S) is approximately 32.07 g/mol, and oxygen (O) is approximately 16.00 g/mol. Using these values, we can calculate the molar mass of potassium sulfate:

Molar mass of K2SO4: - 2 atoms of potassium (K): 2 * 39.10 g/mol = 78.20 g/mol - 1 atom of sulfur (S): 32.07 g/mol - 4 atoms of oxygen (O): 4 * 16.00 g/mol = 64.00 g/mol

Summing these up: 78.20 + 32.07 + 64.00 = 174.27 g/mol

So, the molar mass of potassium sulfate (K2SO4) is approximately 174.27 g/mol.

Given Masses and Moles

Now, let's consider the given masses and moles of substances A, B, and G.

- Mass of potassium sulfate (K2SO4): 696 g - Moles of substance A: 6 moles - Moles of substance B: 3 moles - Moles of substance G: 2 moles

We can use the given mass of potassium sulfate and its molar mass to calculate the moles of potassium sulfate:

Moles of K2SO4: Moles = Mass / Molar mass Moles = 696 g / 174.27 g/mol Moles ≈ 3.994 moles

So, the moles of potassium sulfate (K2SO4) is approximately 3.994 moles.

Conclusion

Given the provided information, we have calculated the molar mass of potassium sulfate and determined the approximate moles of potassium sulfate based on the given mass. If you have any further questions or need additional assistance, feel free to ask!