Question

I have homework to do please answer.Calculate the number of moles in 65.8g of K3PThe options isA)0.444 moles B)2.25 moles C)3.96x1025 moles D)1.09x10-22 moles

Answer 1

The number of moles of K3P is 0.444 moles (OPTION A)

Explanation:

Given information

The mass of K3P is 65.8 grams

Let the number of moles be m

To find the number of moles, we will need to apply the below formula

`\text{ moles = }\frac{\text{ reacting mass}}{\text{ molar mass}}`

The next step is to find the molar mass of K3P

According to the periodic table, the molar mass of potassium is 39.0983 g/mol, and the molar mass of phosphorus is 30.97 g/mol

Since we have gotten the molar mass of each element, then, it is easy to find the molar mass of the compound.

`\begin{gathered} K_3P\text{ = (3 }*39.0983)\text{ + (1}*30.97) \\ K_3P\text{ = }117.2949\text{ + 30.97} \\ K_3P\text{ = 148.2649 g/mol} \end{gathered}`

Since we have gotten the molar mass of the compound, then, we can now find the number of moles

`\begin{gathered} \text{ mole = }\frac{\text{ reacting mass}}{\text{ molar mass}} \\ \text{mole = }(65.8)/(148.2649) \\ \text{mole = 0.444 moles} \end{gathered}`