<h2>Answer:</h2>
<em>8.67kJ/mol</em>
<h2>Explanations</h2>
The formula for calculating the amount of heat absorbed by the water is given as:

Determine the moles of KI

Since heat is lost, hence the enthalpy change of the solution will be negative that is:

Determine the enthalpy of solution in kJ•mol-1

Hence the enthalpy of solution in kJ•mol-1 for KI is 8.67kJ/mol
Hello!
The pressure of an 18 L container which holds 16,00 grams of oxygen gas (O₂) at 45 °C is
0,725 atmTo solve this problem we first need to set up the data in the appropriate units to input it in the
Ideal Gas Law.
a) 16 g of Oxygen gas to moles of oxygen gas:

b) 45 °C to K

Now, we clear the Ideal Gas Equation for P, and solve it:

Have a nice day!
Answer:because they have the same number of valence electrons
Explanation:
Valence electrons determine reactivity.