Respuesta :
ANSWER
The number of moles of K3P is 0.444 moles (OPTION A)
STEP-BY-STEP 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
[tex]\text{ moles = }\frac{\text{ reacting mass}}{\text{ molar mass}}[/tex]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.
[tex]\begin{gathered} K_3P\text{ = (3 }\times39.0983)\text{ + (1}\times30.97) \\ K_3P\text{ = }117.2949\text{ + 30.97} \\ K_3P\text{ = 148.2649 g/mol} \end{gathered}[/tex]Since we have gotten the molar mass of the compound, then, we can now find the number of moles
[tex]\begin{gathered} \text{ mole = }\frac{\text{ reacting mass}}{\text{ molar mass}} \\ \text{mole = }\frac{65.8}{148.2649} \\ \text{mole = 0.444 moles} \end{gathered}[/tex]