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174. When M,S3(s) is heated in air, it is converted to MO2(s). A 4.000-g sample of M2S3(s) shows a decrease in mass of 0.277 g when it is heated in air. What is the average atomic mass of M?

174. When M,S3(s) is heated in air, it is converted to MO2(s). A 4.000-g sample of M2S3(s) shows a decrease in mass of 0.277 g when it is heated in air. What is the average atomic mass of M?

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter2: Chemical Compounds
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duced by the followl "OF a the I. C,H;O;N(s) + 3H,(g) + HCI(aq) → CH;ONCI(s) + 2H,0(1) cess, II. CH,ONCI(s) + NaOH(aq) CH,ON(s) + H,O() + NaCI(aq) III. CH,ON(s) + C,H,O;(1) C3H,O,N(s) + HC,H,O2(1) The first two reactions have percent yields of 87% and 98% by mass, respectively. The overall reaction yields 3 moles of acetaminophen product for every 4 moles of CH5O3N reacted. a. What is the percent yield by mass for the overall process? b. What is the percent yield by mass of Step III? D6 kg each tep is 173. An element X forms both a dichloride (XC12) and a tetrachloride (XCL4). Treatment of 10.00 g XCl, with excess chlorine forms 12.55 g XCI4. Calculate the atomic mass of X, and identify X. 174. When M2S3(s) is heated in air, it is converted to MO2(s). A 4.000-g sample of M,S3(s) shows a decrease in mass of 0.277 g when it is heated in air. What is the average atomic mass of M? 175. When aluminum metal is heated with an element from Group 6A of the periodic table, an ionic compound forms. When the experiment is performed with an unknown Group 6A element, the product is 18.56% Al by mass. What is the formula of the compound? 176. Consider a mixture of potassium chloride and potassium ni- trate that is 43.2% potassium by mass. What is the percent KCI by mass of the original mixture? 177. Ammonia reacts with O2 to form either NO(g) or NO2(g) ac- cording to these unbalanced equations: s with ertain оху- umed, nts of a pro- oxide te the cid to n gas. 1g of hloric iginal which NH,(g) + 0,(g) NH,(g) + 02g) → NO,(8) + H0(g) seous with - NO(g) + H,O(g) moles in the In a certain experiment 2.00 moles of NH3(g) and 10.00 moles of O,(g) are contained in a closed flask. After the reaction is complete, 6.75 moles of O2(g) remains. Calculate the number of moles of N0(g) in the product mixture: (Hint: You cannot do this problem by adding the balanced equations because you cannot assume that the two reactions will occur with equal probability.) ass of -letely mine prod- aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen), burn it in air, and col- lect 2.20 g CO2 and 0.400 g H2O. You know that the molar 178. You take 1.00 g of an ss hy- is the
Transcribed Image Text:duced by the followl "OF a the I. C,H;O;N(s) + 3H,(g) + HCI(aq) → CH;ONCI(s) + 2H,0(1) cess, II. CH,ONCI(s) + NaOH(aq) CH,ON(s) + H,O() + NaCI(aq) III. CH,ON(s) + C,H,O;(1) C3H,O,N(s) + HC,H,O2(1) The first two reactions have percent yields of 87% and 98% by mass, respectively. The overall reaction yields 3 moles of acetaminophen product for every 4 moles of CH5O3N reacted. a. What is the percent yield by mass for the overall process? b. What is the percent yield by mass of Step III? D6 kg each tep is 173. An element X forms both a dichloride (XC12) and a tetrachloride (XCL4). Treatment of 10.00 g XCl, with excess chlorine forms 12.55 g XCI4. Calculate the atomic mass of X, and identify X. 174. When M2S3(s) is heated in air, it is converted to MO2(s). A 4.000-g sample of M,S3(s) shows a decrease in mass of 0.277 g when it is heated in air. What is the average atomic mass of M? 175. When aluminum metal is heated with an element from Group 6A of the periodic table, an ionic compound forms. When the experiment is performed with an unknown Group 6A element, the product is 18.56% Al by mass. What is the formula of the compound? 176. Consider a mixture of potassium chloride and potassium ni- trate that is 43.2% potassium by mass. What is the percent KCI by mass of the original mixture? 177. Ammonia reacts with O2 to form either NO(g) or NO2(g) ac- cording to these unbalanced equations: s with ertain оху- umed, nts of a pro- oxide te the cid to n gas. 1g of hloric iginal which NH,(g) + 0,(g) NH,(g) + 02g) → NO,(8) + H0(g) seous with - NO(g) + H,O(g) moles in the In a certain experiment 2.00 moles of NH3(g) and 10.00 moles of O,(g) are contained in a closed flask. After the reaction is complete, 6.75 moles of O2(g) remains. Calculate the number of moles of N0(g) in the product mixture: (Hint: You cannot do this problem by adding the balanced equations because you cannot assume that the two reactions will occur with equal probability.) ass of -letely mine prod- aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen), burn it in air, and col- lect 2.20 g CO2 and 0.400 g H2O. You know that the molar 178. You take 1.00 g of an ss hy- is the
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