(c) Photodecomposition reaction (Photolysis) b. Oxygen gas generated by the reaction 2KCLO3 (s) -----> 2KCL(s) + 3O2(g), is collected at 27 celcius I a 2.00 L container at a pressure of 750. torr. Oxygen gas, generated by the reaction 2KClO3(s)---2KCl(s)+3O2(g), is collected over water at 27•C in 3.72L vassel at a total pressure of 730 torr. moles O2 = 0.966 x 2.00 / 0.08206 x 300 K=0.0785, mass KClO3 = 0.0532 mol x 122.55 g/mol=6.52 g. Correct your pressure by subtracting the 26.0 torr of water vapor from your 760 torr total pressure giving you 734 torr of oxygen gas pressure. How many moles of KClO3 were consumed in the reaction? Share ... Meth­ane has no smell or taste, and is a non-tox­ic sub­stance. What was the percent yield of the reaction… Get your answers by asking now. ? 6.30 × 10−2 mol This is n moles. What is the mole ratio of KClO3 to O2in this reaction? How many moles of KClO3 were consumed in the reaction? How many molecules of oxygen gas, O2, are produced in question 2? The combustion reaction between hydrogen and oxygen is used to power rocket engines,  including the main engines on the space shuttle. Now plug into PV = nRT to find V which is the volume occupied by oxygen. 1. In the above reaction, potassium chlorate(K C l O 3 ) decomposes to form potassium chloride(KCl) and oxygen(O 2 ). How many moles of O2 can be produced by letting 6.0 moles of KClO3 react based on the above equation? Now we will use the actual yield and the theoretical yield to calculate the percent yield. How do we know for certain protons and electrons exist? n = pV/RT = 0.987 x 2.00 / 0.0821 x 300 = 0.0801. 2KClO3 + Heat → 2KCl + 3O2 (b) Electrolytic decomposition reaction (Electrolysis) Decomposition of sodium chloride: On passing electricity through molten sodium chloride, it. 1. . a) 0.0790 moles b) 0.119 moles c) 0.0527 moles d) 0.0813 moles none of these Oxygen gas, generated by the reaction 2KClO3(s)-> 2KCl(s)+3O2(g) is collected over water at 27°C in a 1.55-L vessel at a total pressure of 1.00 atm. 2 - B. 0.189 mol2. Therefore, it is a decomposition reaction which is also endothermic in nature. 0.142 mol4. In the laboratory preparation of oxygen gas, the following reaction is carried out: 2KClO3(s)→2KCl(s)+3O2(g) How many moles of oxygen gas can be produced from the decomposition of 250.0 g of KClO3? How many moles of KClO3 were consumed in the reaction? What would water be like with 2 parts oxygen? Small samples of oxygen gas needed in the laboratory can be generated by a number of simple chemical reactions, such as 2KClO3(s) 2KCl(s)+3O2(g). The mass of carbon dioxide produced is 3.350 g, and the mass of water produced is 0.8232 g. How many moles of oxygen gas would react with 250g of KCl? Chemistry Q&A Library Small quantities of oxygen gas are generated in the laboratory by the following reaction in the presence of MnO2: 2KCLO3(s)——> 2KCl(s)+3O2(g) What volume of oxygen is collected over water @ 25 degrees C by reaction of 0.750 g potassium chlorate if the corrected barometric pressure is 0.996atm? Calculation of percent yield. What volume in liters would the oxygen gas produced in part (a) occupy at 23.0 ∘C and 781.0 mmHg ? The balanced equation is: 2KClO3 (aq) = 2KCl (aq) + 3O2 (g) What is the correct balanced equation for the reaction in which potassium chlorate … d. How many grams of oxygen gas will be produced when 59.62 gems of potassium chlorate is heated? So, in order to find the volume of oxygen gas at STP, you need to know how many moles of oxygen are produced by this reaction. 2KClO3 → 2KCl + 3O2 If all the KClO3 in a mixture containing 1.58 g KClO3 and 0.30 g MnO2 is decomposed, how many liters of O2 gas will be generated at T = 25.0°C and P = 760.6 . Oxygen gas, generated by the reaction 2KClO3(s) ® 2KCl(s) + 3O2(g), is collected over water at 27°C in a 2.00-L vessel at a total pressure of 760. torr. 73. Once collected, several tests will be performed in order to investigate the role of oxygen in several combustion reactions. Now go to the balanced reaction equation which says that 2 moles KClO3 makes 3 moles O2. decomposes into sodium and chlorine. The flamma­bil­i­ty lim­it of the gas is a con­cen­tra­tion in air from 5 to 15%. How many moles of KCLO3 were used in … 2KClO3(s) 2KCl(s) + 3O2(g) a) 7.79 L b) 0.085 L c) 4.20 L d) 3.0 L e) 11.7 L 192 g 6.00 g 85.3 g 735 g Then convert your mol of KClO3 to grams using molar mass. The mol O2 converts to moles KClO3 by using 3 moles O2 = 2 moles KClO3 mole ratio. According to this balanced chemical equation, how many moles of oxygen gas are produced from the reaction of 2 moles of KClO3 solid? Trump now the ‘mayor’ of Mar-a-Lago, lawyer claims, Democrats: Trump 'inciter in chief' of Capitol attack, NBA player will be going to jail after season, Brand formerly known as Aunt Jemima gets new name, Group 'outraged' by American Girl doll with gay aunts, Bruce Springsteen arrested for DWI in November, Terez Paylor, Yahoo Sports NFL writer, dies at 37, Kidnapped girl, 10, saved by sanitation workers, Rodgers-Woodley pairing isn't as odd as you think, Why more thieves want your car's catalytic converter, 3 people stranded on island for 33 days rescued. Under these conditions for pressure and temperature, one mole of any ideal gas occupies . For the reaction shown, calculate how many grams of oxygen form when each quantity of reactant completely reacts 1.) 0.359 g KClO3 2.) Now you can calc moles of oxygen gas using Pv = nRT (You use 734/760 atm for your pressure. Small quantities of oxygen gas are sometimes generated by heating KClO3 in the presence of MnO2 as a catalyst: 2KClO3(s) → 2KCl(s) + 3O2(g) What volume (ml) of O2 is collected over water at 23.0 oC by the reaction of 0.253 g of KClO3 if the barometric pressure is 723.9 mm Hg The vapor pressure of water at 23.0 oC is 21.1 mm Hg Since we have half of the reactant we get half the product - 1.5 moles. Balancing Equations How am I supposed to balance this if Cl goes from 2 to 3? Get your answers by asking now. The compound KClO3 decomposes according to the following equation: 2KClO3 = 2KCl + 3O2. 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