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00. An unknown liquid is composed of 5.57% H, 28.01% CI, and 66.42% C. The molecular mass found by mass spec- trometry is 126.58 amu. What is the molecular formula of the compound?

00. An unknown liquid is composed of 5.57% H, 28.01% CI, and 66.42% C. The molecular mass found by mass spec- trometry is 126.58 amu. What is the molecular formula of the compound?

Chemistry
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
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Can you please solve question 3.100 and show all of the work and go in depth 

### Chemical Problems and Empirical Formula Calculations #### 3.100 An unknown liquid is composed of 5.57% H, 28.01% Cl, and 66.42% C. The molecular mass found by mass spectrometry is 126.58 amu. What is the molecular formula of the compound? #### 3.101 An unknown liquid is composed of 34.31% C, 5.28% H, and 60.41% I. The molecular mass found by mass spectrometry is 210.06 amu. What is the molecular formula of the compound? #### 3.102 What is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect teeth against decay? Its mass percent composition is 24.25% F, 75.75% Sn. #### 3.103 What are the empirical formulas of each of the following substances? (a) Ibuprofen, a headache remedy: 75.69% C, 15.51% O, 8.80% H (b) Magnetite, a naturally occurring magnetic mineral: 72.36% Fe, 27.64% O (c) Zircon, a mineral from which cubic zirconia is made: 34.91% O, 15.32% Si, 49.77% Zr #### 3.104 Combustion analysis of 45.62 mg of toluene, a commonly used solvent, gives 35.67 mg of H2O and 152.5 mg of CO2. What is the empirical formula of toluene? #### 3.105 Coniine, a toxic substance isolated from poison hemlock, contains only carbon, hydrogen, and nitrogen. Combustion analysis of a 5.024 mg sample yields 13.90 mg of CO2 and 6.048 mg of H2O. What is the empirical formula of coniine? #### 3.106 Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms. If cytochrome c is 0.43% Fe by mass, what is its minimum molecular mass? #### 3.107 Nitrogen fixation in the root nodules of peas and other leguminous plants is carried out by Rhizobium bacteria.
Transcribed Image Text:### Chemical Problems and Empirical Formula Calculations #### 3.100 An unknown liquid is composed of 5.57% H, 28.01% Cl, and 66.42% C. The molecular mass found by mass spectrometry is 126.58 amu. What is the molecular formula of the compound? #### 3.101 An unknown liquid is composed of 34.31% C, 5.28% H, and 60.41% I. The molecular mass found by mass spectrometry is 210.06 amu. What is the molecular formula of the compound? #### 3.102 What is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect teeth against decay? Its mass percent composition is 24.25% F, 75.75% Sn. #### 3.103 What are the empirical formulas of each of the following substances? (a) Ibuprofen, a headache remedy: 75.69% C, 15.51% O, 8.80% H (b) Magnetite, a naturally occurring magnetic mineral: 72.36% Fe, 27.64% O (c) Zircon, a mineral from which cubic zirconia is made: 34.91% O, 15.32% Si, 49.77% Zr #### 3.104 Combustion analysis of 45.62 mg of toluene, a commonly used solvent, gives 35.67 mg of H2O and 152.5 mg of CO2. What is the empirical formula of toluene? #### 3.105 Coniine, a toxic substance isolated from poison hemlock, contains only carbon, hydrogen, and nitrogen. Combustion analysis of a 5.024 mg sample yields 13.90 mg of CO2 and 6.048 mg of H2O. What is the empirical formula of coniine? #### 3.106 Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms. If cytochrome c is 0.43% Fe by mass, what is its minimum molecular mass? #### 3.107 Nitrogen fixation in the root nodules of peas and other leguminous plants is carried out by Rhizobium bacteria.
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