Please help,i really need this!!!
2 answers:
Answer: Option (A) is the correct answer.
Explanation:
When calcium reacts with potassium chloride then it results in the formation of calcium oxide and potassium ions.
The given equation is as follows.
Number of atoms on reactant side are as follows.
- Ca = 1
- K = 1
- Cl = 1
Number of atoms on product side are as follows.
- Ca = 1
- K = 1
- Cl = 2
To balance the given equation, multiply KCl by 2 on the reactant side and multiply potassium ions by 2 on product side. Therefore, balanced chemical equation will be as follows.
You might be interested in
25.9 kJ/mol. (3 sig. fig. as in the heat capacity.)
<h3>Explanation</h3>The process:
.
How many moles of this process?
Relative atomic mass from a modern periodic table:
- K: 39.098;
- N: 14.007;
- O: 15.999.
Molar mass of :
.
Number of moles of the process = Number of moles of dissolved:
.
What's the enthalpy change of this process?
for
. By convention, the enthalpy change
measures the energy change for each mole of a process.
.
The heat capacity is the least accurate number in these calculation. It comes with three significant figures. As a result, round the final result to three significant figures. However, make sure you keep at least one additional figure to minimize the risk of rounding errors during the calculation.
