Answer
60.83 grams
Explanation
Given equation:
2KClO₃ → 2KCl + 3O₂
What to find:
The mass in grams of potassium chloride produced if 100 g of potassium chlorate decomposes.
From the Periodic Table; Molar mass of KClO₃ = 122.55 g/mol, KCl = 74.55 g/mol.
Therefore, from the balanced equation:
2 x 122.55 g KClO₃ decomposes to produce 2 x 74.55 g KCl
So, 100 g KClO₃ will decompose to produce x g KCl
Cross multiply
[tex]\begin{gathered} x\text{ g }KCl\times245.10g\text{ }KClO_3=149.10g\text{ }KCl\times100g\text{ }KClO_3 \\ To\text{ get x g }KCl,\text{ divide both sides by }245.10g\text{ }KClO_3 \\ \frac{x\text{ g }KCl\times245.10g\text{ }KClO_3}{245.10g\text{ }KClO_3}=\frac{149.10g\text{ }KCl\times100g\text{ }KClO_3}{245.10g\text{ }KClO_3} \\ x\text{ g }KCl=60.83\text{ grams} \end{gathered}[/tex]
