Questions 8 to 10 pertain to the following information:Combustion of 63.8 mg of a compound C,H,Oz produces 145.0 mg CO₂ and 59.38 mg H₂O.The molar mass of H₂O is 18.01 g/mol. The molar mass of CO₂ is 44.01 g/mol.What is the mass of hydrogen H in 63.8 mg of the compound?8.A) 3.32 mg HB) 1.66 mg H6.65 mg HCHEM 1P919.Saturday 15 February 2020Midterm ExaminationWhat is the mass of carbon C in 63.8 mg of the compound?A) 19.8 mg C39.6 mg CC) 57.2 mg C10.What is the empirical formula of the compound?A) C₁H₂OB) CHOCⒸC.H.OD) C₂H₂OPage 4 of 14

Check the number of moles in the given masses and use mol to mol ratio to convert moles in the mass.

Combustion of 63.8 mg of a compound C,H,Oz produces 145.0 mg CO₂ and 59.38 mg H₂O. The molar mass of H₂O is 18.01 g/mol. The molar mass of CO₂ is 44.01 g/mol. 8. What is the mass of hydrogen H in 63.8 mg of the compound? A) 3.32 mg H B) 1.66 mg H 6.65 mg H CHEM 1P91 Saturday 15 February 2020 Midterm Examination What is the mass of carbon C in 63.8 mg of the compound? A) 19.8 mg C 39.6 mg C C) 57.2 mg C 10. What is the empirical formula of the compound? A) C₂H₂O B) CHO ⒸC.H.O D) C₂H₂O Page 4 of 14

Combustion of 63.8 mg of a compound C,H,Oz produces 145.0 mg CO₂ and 59.38 mg H₂O. The molar mass of H₂O is 18.01 g/mol. The molar mass of CO₂ is 44.01 g/mol. 8. What is the mass of hydrogen H in 63.8 mg of the compound? A) 3.32 mg H B) 1.66 mg H 6.65 mg H CHEM 1P91 Saturday 15 February 2020 Midterm Examination What is the mass of carbon C in 63.8 mg of the compound? A) 19.8 mg C 39.6 mg C C) 57.2 mg C 10. What is the empirical formula of the compound? A) C₂H₂O B) CHO ⒸC.H.O D) C₂H₂O Page 4 of 14

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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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

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