Question

Обчисліть масову частку Оксигену (%) у залізній окалині (Fe3O4)срочно ​

Answer 1

Ответ:

27.6 %

Объяснение:

w(O) = N(O) * Ar(O) /Mr(FeO4) * 100% = 4 *16/232 *100 = 27.6 (%)

Answer 2

Calculating the Mass Fraction of Oxygen in Iron Oxide (Fe3O4)

To calculate the mass fraction of oxygen in iron oxide (Fe3O4), we can use the chemical formula of Fe3O4 to determine the molar masses of iron (Fe) and oxygen (O), and then use these values to calculate the mass fraction of oxygen.

The molar mass of Fe is approximately 55.845 g/mol, and the molar mass of O is approximately 16.00 g/mol. Using the chemical formula Fe3O4, we can calculate the molar mass of Fe3O4 as follows:

Molar mass of Fe3O4 = (3 * molar mass of Fe) + (4 * molar mass of O) = (3 * 55.845 g/mol) + (4 * 16.00 g/mol) = 167.535 g/mol + 64.00 g/mol = 231.535 g/mol

Now that we have the molar mass of Fe3O4, we can calculate the mass fraction of oxygen in Fe3O4 using the following formula:

Mass fraction of oxygen (%) = (Mass of oxygen / Total mass of Fe3O4) * 100

Substituting the values, we get:

Mass fraction of oxygen (%) = (64.00 g / 231.535 g) * 100 ≈ 27.62%

Therefore, the mass fraction of oxygen in iron oxide (Fe3O4) is approximately 27.62%.