Answer:
![n_{K^+}=0.0009molK^+](https://tex.z-dn.net/?f=n_%7BK%5E%2B%7D%3D0.0009molK%5E%2B)
Explanation:
Hello,
In this case, the first step is to compute the number of moles of potassium phosphate in 20.0 mL (0.020L) of the 0.015-M (mol/L) solution as shown below:
![n=0.020L*0.015\frac{mol}{L}=0.0003mol](https://tex.z-dn.net/?f=n%3D0.020L%2A0.015%5Cfrac%7Bmol%7D%7BL%7D%3D0.0003mol)
Thus, these moles correspond to potassium phosphate moles, which molecular formula is K₃PO₄, therefore, one mole of this compound contains three moles of potassium ions as it has three as its subscript in the formula. Thereby, the moles of potassium ions result in:
![n_{K^+}=0.0003molK_3PO_4*\frac{3molK^+}{1molK_3PO_4} \\\\n_{K^+}=0.0009molK^+](https://tex.z-dn.net/?f=n_%7BK%5E%2B%7D%3D0.0003molK_3PO_4%2A%5Cfrac%7B3molK%5E%2B%7D%7B1molK_3PO_4%7D%20%5C%5C%5C%5Cn_%7BK%5E%2B%7D%3D0.0009molK%5E%2B)
Best regards.
the answer is D) they have the same properties as their elements.
The two factors must be considered when predicting whether two substances will dissolve in each other are type of bonds and size of the molecules are two factors.
<h3>What is solubility?</h3>
Solubility is the ability of solute particles to dissolve in any solvent, and solubility is directly proportional to the dissolving ability of the solute.
Solubility of any substance depends on the type of the bond present in the solute molecule i.e. polar or non polar. And it is also depends on the size of the solute as size defines the surface tenssion of the substance.
- Number of bonds and shape of molecules are also define the solubility but not at that extent as their type and shape.
Hence type of bonds and size of the molecules are two factors.
To know more about dissolution, visit the below link:
brainly.com/question/26073928
<u>Answer:</u> The correct answer is Option A.
<u>Explanation:</u>
Mole ratio is defined as the ratio between the stoichiometric coefficients of the molecules present in the chemical reaction.
For the given balanced chemical equation:
![3Fe+4H_2O\rightarrow Fe_3O_4+4H_2](https://tex.z-dn.net/?f=3Fe%2B4H_2O%5Crightarrow%20Fe_3O_4%2B4H_2)
By Stoichiometry of the reaction:
3 moles of iron metal reacts with 4 moles of water to produce 1 mole of iron oxide and 4 moles of hydrogen gas.
The mole ratio of ![Fe_3O_4:Fe=1:3](https://tex.z-dn.net/?f=Fe_3O_4%3AFe%3D1%3A3)
Hence, the correct answer is Option A.