Question

Рассчитайте массовые доли элементов в веществе: K₃ PO₄

Answer 1

Mr=39×3+31+16×4=212 W (K)=39×3/212=0,551=55,1% W (P)=31/212=0,146=14,6% W (O)=16×4/212=0,301=30,1%

Answer 2

Calculating the Mass Percent of Elements in K₃PO₄

To calculate the mass percent of elements in a compound, we need to consider the molar mass of each element and the total molar mass of the compound.

Step 1: Calculate the Molar Mass of K₃PO₄ The molar mass of K₃PO₄ can be calculated by adding the molar masses of potassium (K) and phosphorus (P) and oxygen (O) in the compound.

The molar mass of potassium (K) is approximately 39.10 g/mol. The molar mass of phosphorus (P) is approximately 30.97 g/mol. The molar mass of oxygen (O) is approximately 16.00 g/mol.

Using these values, we can calculate the molar mass of K₃PO₄.

Step 2: Calculate the Mass Percent of Each Element Once we have the molar mass of K₃PO₄, we can calculate the mass percent of each element in the compound.

The mass percent of an element in a compound is calculated using the following formula: \[ \text{Mass percent of element} = \frac{\text{Molar mass of element in the compound}}{\text{Molar mass of the compound}} \times 100\% \]

By applying this formula to potassium (K), phosphorus (P), and oxygen (O), we can determine their respective mass percentages in K₃PO₄.

Let's proceed with the calculations.