Question

Обчислити масову частку карбону у бутані

Answer 1

Решение:
Mr(C₄H₁₀) = 12·4 + 10·1 = 58 г/моль
ω(C) $= \frac{48}{58} * 100 = 83$ %

Answer 2

Calculating the Mass Fraction of Carbon in Butane

To calculate the mass fraction of carbon in butane, we can use the chemical formula of butane, which is C4H10. The mass fraction of carbon in butane can be calculated using the following formula:

Mass Fraction of Carbon = (Mass of Carbon in Butane) / (Total Mass of Butane)

Now, let's calculate the mass fraction of carbon in butane using the given chemical formula.

Calculation

The molar mass of carbon (C) is approximately 12.01 g/mol, and the molar mass of hydrogen (H) is approximately 1.008 g/mol.

The molar mass of butane (C4H10) can be calculated as follows: Molar Mass of Butane = (4 * Molar Mass of Carbon) + (10 * Molar Mass of Hydrogen)

Substitute the values: Molar Mass of Butane = (4 * 12.01 g/mol) + (10 * 1.008 g/mol)

Calculate the molar mass of butane.

Molar Mass of Butane = (48.04 g/mol) + (10.08 g/mol) = 58.12 g/mol

Now, we can calculate the mass fraction of carbon in butane using the molar masses of carbon and butane.

Mass Fraction of Carbon = (4 * Molar Mass of Carbon) / Molar Mass of Butane

Substitute the values: Mass Fraction of Carbon = (4 * 12.01 g) / 58.12 g ≈ 0.824

Conclusion

The mass fraction of carbon in butane is approximately 82.4%.

This calculation is based on the chemical formula of butane (C4H10) and the molar masses of carbon and hydrogen.