Question

Решите CuCo3 вычесть массовую долю углерода

Answer 1

W(C) =Ar(C) / Mr(CuCO3) = 12 / 64+16*3+12= 12 / 124= 0.097=9.7%

Answer 2

Calculation of Mass Fraction of Carbon in CuCO3

To calculate the mass fraction of carbon in CuCO3, we need to determine the molar mass of carbon and the molar mass of CuCO3.

The molar mass of carbon (C) is approximately 12.01 g/mol.

The molar mass of CuCO3 can be calculated by adding the molar masses of copper (Cu), carbon (C), and three oxygen (O) atoms. The molar mass of copper is approximately 63.55 g/mol and the molar mass of oxygen is approximately 16.00 g/mol.

Therefore, the molar mass of CuCO3 is:

Molar mass of CuCO3 = (Molar mass of Cu) + (Molar mass of C) + 3 * (Molar mass of O) = 63.55 g/mol + 12.01 g/mol + 3 * 16.00 g/mol = 63.55 g/mol + 12.01 g/mol + 48.00 g/mol = 123.56 g/mol

Now, let's calculate the mass fraction of carbon in CuCO3.

The mass fraction of carbon (C) in CuCO3 can be calculated using the following formula:

Mass fraction of C = (Molar mass of C) / (Molar mass of CuCO3) * 100%

Substituting the values:

Mass fraction of C = (12.01 g/mol) / (123.56 g/mol) * 100% ≈ 9.71%

Therefore, the mass fraction of carbon in CuCO3 is approximately 9.71%.

Please note that the values provided are approximate and may vary slightly depending on the source and the method used for calculation.

I hope this helps! Let me know if you have any further questions.