How many grams of KCl(s)are produced from the thermal decomposition of KClO₃(s)which produces 25.0 mL of O₂(g)at 25°C and 1.00 atm pressure according to the chemical equation shown below? 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g) A)0)0508 g B)0)0762 g C)0)0835 g D)0)152 g

Question

Quizplus · Accepted Answer

The balanced chemical equation shows that 2 moles of KClO3 produce 3 moles of O2. Therefore, the number of moles of O2 produced is:n(O2) = V(O2) / V(m) = 25.0 mL / 22.4 L/mol = 0.001116 molAccording to the stoichiometry of the balanced chemical equation, 2 moles of KClO3 produce 2 moles of KCl. Therefore, the number of moles of KCl produced is:n(KCl) = n(O2) = 0.001116 molThe molar mass of KCl is 74.55 g/mol. Therefore, the mass of KCl produced is:m(KCl) = n(KCl) * M(KCl) = 0.001116 mol * 74.55 g/mol = 0.0835 gTherefore, the correct answer is C) 0.0835 g.

How Many Grams of KCl(s)are Produced from the Thermal Decomposition