Question

Помогите Рассчитать массовые доли элементов в NH3

Answer 1

Дано:
ω (NH₃) = 100%.
Найти:
ω (N в NH₃) – ?
ω (H в NH₃) – ?
Решение:
Mr (NH₃) = 14 + 3 = 17.
Mr (N) = 14.
Mr (H₃) = 3
17 – 100%
14 – x %
     14 · 100
x =    17     ≈ 82,35 (%) – ω N в NH₃.
17 – 100%
3 – x %
     3 · 100
x =   17     ≈ 17,65 (%) – ω H в NH₃.
Ответ: N в NH₃ = 82,35%, H в NH₃ = 17,65%.

Answer 2

Calculating the Mass Percentages of Elements in NH3

To calculate the mass percentages of elements in NH3 (ammonia), we can use the molecular weights of the elements involved. The molecular weight of nitrogen (N) is 14, and the molecular weight of hydrogen (H) is 1.

Using the formula w% (element) = (Mr (element) / Mr (NH3)) * 100%, where Mr represents the molecular weight, we can calculate the mass percentages of the elements in NH3.

- NH3: - w% (N) = (14 / 17) * 100% = 82.3% - w% (H) = 100% - 82.3% = 17.7%.

Therefore, the mass percentages of nitrogen and hydrogen in NH3 are 82.3% and 17.7%, respectively.

This calculation is based on the molecular weights of the elements involved and the formula for calculating mass percentages.

I hope this helps! If you have any further questions, feel free to ask.