Question

Как найти массовую долю элементов нитрата калия?Заранее спасибо)

Answer 1

KNO3

W(K) = Ar(K) * n / М(KNO3) *100% = 39 *1 / 101 *100% = 38,61 %

W(N) = Ar(N) *n / M(KNO3) * 100% = 14 * 1 / 101 * 100% = 13,86 %

W(O) = Ar(O) * n / M(KNO3)  *100% = 16 * 3 / 101 * 100% = 47,52 %

Answer 2

Finding the Mass Fraction of Elements in Potassium Nitrate

To find the mass fraction of elements in potassium nitrate, you can use the chemical formula of potassium nitrate (KNO3) to calculate the mass percentage of each element.

Potassium Nitrate (KNO3) Composition: - Potassium (K) = 39.10% - Nitrogen (N) = 13.85% - Oxygen (O) = 47.05%.

The mass fraction of each element in potassium nitrate can be calculated using the molar mass of each element and the chemical formula of potassium nitrate.

Calculation Example: - For Potassium (K): - Molar mass of K = 39.10 g/mol - Molar mass of KNO3 = 101.10 g/mol - Mass fraction of K = (39.10 / 101.10) * 100 = 38.67%

- For Nitrogen (N): - Molar mass of N = 14.01 g/mol - Molar mass of KNO3 = 101.10 g/mol - Mass fraction of N = (14.01 / 101.10) * 100 = 13.85%

- For Oxygen (O): - Molar mass of O = 16.00 g/mol - Molar mass of KNO3 = 101.10 g/mol - Mass fraction of O = (3 * 16.00 / 101.10) * 100 = 47.05%.

Therefore, the mass fraction of elements in potassium nitrate is: - Potassium (K) = 38.67% - Nitrogen (N) = 13.85% - Oxygen (O) = 47.05%.

This calculation is based on the chemical composition of potassium nitrate and the molar masses of its constituent elements.

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