Potassium chlorate(V) decomposes on heating to form oxygen. 2KClO3 ? 2KCl + 3O2 What is the atom economy (by mass) for the formation of oxygen? [Ar values: O = 16.0 Cl = 35.5 K = 39.1] A 13.1 % B 26.1 % C 39.2 % D 64.3 %
Added by Michelle Y.
Close
Step 1
For potassium chlorate (KClO3), the molar mass is: (39.1 * 1) + (35.5 * 1) + (16.0 * 3) = 122.6 g/mol For oxygen (O2), the molar mass is: 16.0 * 2 = 32.0 g/mol The reaction produces 3 moles of oxygen, so the total mass of oxygen produced is: 32.0 g/mol * 3 = Show more…
Show all steps
Your feedback will help us improve your experience
Ankur S and 68 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The thermal decomposition of potassium perchlorate to produce potassium chloride and oxygen takes place at approximately 610 °C. KClO4 → KCl + 2O2 The evolved oxygen from this reaction is captured and compressed into a 500.0 mL container, which is stored at 5 °C. If the pressure gauge on the container reads 5120 mmHg, how many moles of oxygen gas are present? Note: To be autoscored correctly, your answer must be entered in standard form, containing only digits and a decimal point (without using exponential notation or including units).
Susan H.
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: $$ 4 \mathrm{KNO}_{3}(s) \longrightarrow 2 \mathrm{~K}_{2} \mathrm{O}(s)+2 \mathrm{~N}_{2}(g)+5 \mathrm{O}_{2}(g) $$ To produce $56.6 \mathrm{~kg}$ of oxygen, how many (a) moles of $\mathrm{KNO}_{3}$ and (b) grams of $\mathrm{KNO}_{3}$ must be heated?
Adi S.
3.71 Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s) -> 2K2O(s) + 2N2(g) + 5O2(g). To produce 56.6 kg of oxygen, how many (a) moles of KNO3 and (b) grams of KNO3 must be heated?
Nicole K.
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD