How many grams of KCl(s)are produced from the thermal decomposition of KClO₃(s)which produces 50.0 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)102 g B)0)152 g C)0)167 g D)0)304 g

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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:50.0 mL O2 * (1 L / 1000 mL) * (1 mol / 22.4 L) = 0.00223 mol O2According to the balanced chemical equation, 2 moles of KClO3 produce 3 moles of O2. Therefore, the number of moles of KClO3 that decomposed is:0.00223 mol O2 * (2 mol KClO3 / 3 mol O2) = 0.00149 mol KClO3The molar mass of KClO3 is 122.55 g/mol. Therefore, the mass of KClO3 that decomposed is:0.00149 mol KClO3 * 122.55 g/mol = 0.182 g KClO3Therefore, the mass of KCl produced is:0.182 g KClO3 * (2 mol KCl / 2 mol KClO3) * (74.55 g/mol KCl) = 0.102 g KCl

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