3.9) A 3.87-mg sample of ascorbic acid (vitamin C) gives 5.80 mg COz and 1.58 mg H.O on combustion. What is the percentage composition of this compound (the mass percentage of each element)? Ascorbic acid contains only C, H, and O. (hint! use amounts of CO; and H;0 to get #gC and gH then to get #g0 subtract (gC + gH) from the 12.01-C 3.87mg 58X 10 mate total) 5.30mg CO: molchmal c Tooom9 gco mol co molC Magestum n HWK1: fill in the blanks in the tables: KBr Ptan ide 281 1015Yx10 Hheram Ne Polyatomic lons Al0s Nal SrFz LizS A Oide Name 2.113 10 10 Sodiam lodie tan ude 40.9% =C Lum Bde NH" No7 NOS ammonium nitrite 4.5TZ =H agnamde 1a m de CasNa Al S3 KI SrCla Na15 RaBr2 MyS AIN 54.5%=0 nitrate sulfite sulfate hydroxide phosphate carbonate chlorate acetate la rde 14 im unde So- OH I tatm indide strontm chlaride 17 sdmnde Iadium ede CIOr magnem e 2 lumin side

3.9) A 3.87-mg sample of ascorbic acid (vitamin C) gives 5.80 mg COz and 1.58 mg H.O on combustion. What is the percentage composition of this compound (the mass percentage of each element)? Ascorbic acid contains only C, H, and O. (hint! use amounts of CO; and H;0 to get #gC and gH then to get #g0 subtract (gC + gH) from the 12.01-C 3.87mg 58X 10 mate total) 5.30mg CO: molchmal c Tooom9 gco mol co molC Magestum n HWK1: fill in the blanks in the tables: KBr Ptan ide 281 1015Yx10 Hheram Ne Polyatomic lons Al0s Nal SrFz LizS A Oide Name 2.113 10 10 Sodiam lodie tan ude 40.9% =C Lum Bde NH" No7 NOS ammonium nitrite 4.5TZ =H agnamde 1a m de CasNa Al S3 KI SrCla Na15 RaBr2 MyS AIN 54.5%=0 nitrate sulfite sulfate hydroxide phosphate carbonate chlorate acetate la rde 14 im unde So- OH I tatm indide strontm chlaride 17 sdmnde Iadium ede CIOr magnem e 2 lumin side

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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n4 of 14 Consider the following reaction. heat 2 Fe, O, (s) + 3 C(s) → 4 Fe(s) + 3 CO,(g) 3. Calculate the number of grams of Fe,O, needed to react with 11.0 g C. Gmages mass of Fe, O,:
The composition of materials such as alloys and ceramics can be described in terms of mole percentage (mol%), atom percentage (at%), or weight percentage (wt%). Carry out the following conversions among these units. (Enter unrounded anwers.) (a) 93.8 wt% Cu and 6.2 wt% Al to at% at% Cu at% Al (b) 70. mol% Ni0 and 30. mol% MgO to wt% wt% NiO wt% MgO (c) 22.6 wt% MgO and 77.4 wt% Fe2O3 to mol% mol% MgO mol% Fe2 O3
(Record only your final answer rounded to the correct number of significant digits.) 1. The last step in the production of nitric acid is represented by the following reaction: 3 NO2(g) + H2O(l) --> 2 HNO3(aq) + NO(g) Calculate the moles of nitric acid produced when 6.84 mol of nitrogen dioxide react with excess water. 2. In coal, sulfur typically exists in the form of iron pyrites, FeS2, or in organic compounds. Burning coal in power plants converts the sulfur to sulfur dioxide according to the following reaction: 4 FeS2(s) + 11 O2(g) --> 2 Fe2O3(s) + 8 SO2(g) What mass (in grams) of sulfur dioxide is produced when 0.334 mol of oxygen gas reacts?
II. Translate the worded equation and balance the equation. a. Nitric acid Copper = Cupric nitrate + water + nitrogen + dioxide b. Sulfuric acid + Magnesium = Magnesium sulfate + Hydrogen gas c. Sodium iodide + sulfuric acid + manganese dioxide %3D lodine gas + Manganese + sodium sulfate + water d. Aluminum + cupric sulfate Aluminum sulfate + Copper e. Carbon dioxide + water = Glucose (C&H12O6) + Oxygen gas f. Iron (II) sulfide Hydrochloric acid Iron (II) chloride Hydrogen sulfide g. Acetic acid Sodium Hydroxide Sodium acetate + water +
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Q3. 2.027 g of Salicylic acid was mixed with excess acetic anhydride. (Show ALL steps and mathematical equations involved in calculations. Remember to label all steps clearly and use all appropriate units). a. Calculate the moles of Salicylic acid (provide all answers to 4 decimal places) (2) b. Calculate the theoretical yield of Acetylsalicylic acid (aspirin) in moles (provide all answers to 4 decimal places) (2) c. Calculate the theoretical yield of Acetylsalicylic acid (aspirin) in grams (provide all answers to 3 decimal places) (3) Given information: Salicylic acid: Molar mass of salicylic acid: C7H6O3 (7 x 12.01) + (6 x 1) + (3 x 15.99) = 24.07 + 6 + 47.97 = 132.04 g/mol Acetylsalicylic acid: Molar mass of acetylsalicylic acid: C9H8O4 (9 x 12.01) + (8 x 1) + (4 x 15.99) = 102.09 + 8 + 63.96 = 120.05 g/mol
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8. Provide the major organic product of the following reaction. Be sure to indicate proper regiochemistry and stereochemistry if necessary. 13 Fi
M.3.