2. Lactic acid is a by-product of anaerobic respiration and can build up in muscle tissue during physical activity, causing sore muscles. Analysis of lactic acid reveals it is composed of 40.0% carbon, 6.71% hydrogen, and 53.3% oxygen by mass. It is found to have a molar mass of 90.08g/mol. Using this information, determine the molecular formula of lactic acid.

2. Lactic acid is a by-product of anaerobic respiration and can build up in muscle tissue during physical activity, causing sore muscles. Analysis of lactic acid reveals it is composed of 40.0% carbon, 6.71% hydrogen, and 53.3% oxygen by mass. It is found to have a molar mass of 90.08g/mol. Using this information, determine the molecular formula of lactic acid.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter5: Stoichiometry

Section: Chapter Questions

Problem 178CP: You take 1.00 g of an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen),...

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You take 1.00 g of an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen), burn it in air, and collect 2.20 g CO2 and 0.400 g H2O. You know that the molar mass of aspirin is between 170 and 190 g/mol. Reacting 1 mole of salicylic acid with I mole of acetic anhydride (C4H6O3) gives you 1 mole of aspirin and 1 mole of acetic acid (C2H4O2). Use this information to determine the molecular formula of salicylic acid.
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