Domanda del libro di testo
Calculate the percentage of carbon by mass in each of the compounds represented by the following models: (a)
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Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
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Brown 15th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 26f
Brown 15th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 26fCapitolo 3, Problema 26f
Calculate the percentage by mass of the indicated element in the following compounds: f. carbon in capsaicin, C18H27NO3, the compound that gives the hot taste to chili peppers.
Guida verificata passo dopo passo1
Step 1: First, we need to calculate the molar mass of capsaicin, C18H27NO3. The molar mass of an element is the mass of one mole of that element. It is calculated by adding up the atomic masses of all the atoms in the compound. The atomic masses of carbon (C), hydrogen (H), nitrogen (N), and oxygen (O) are approximately 12.01 g/mol, 1.01 g/mol, 14.01 g/mol, and 16.00 g/mol, respectively.
Step 2: Multiply the atomic mass of each element by the number of atoms of that element in the compound. For capsaicin, this would be (18 atoms C * 12.01 g/mol C) + (27 atoms H * 1.01 g/mol H) + (1 atom N * 14.01 g/mol N) + (3 atoms O * 16.00 g/mol O).
Step 3: Add up all the values obtained in step 2 to get the molar mass of capsaicin.
Step 4: To find the percentage by mass of carbon in capsaicin, divide the total mass of carbon in one mole of capsaicin by the molar mass of capsaicin. This would be (18 atoms C * 12.01 g/mol C) / molar mass of capsaicin.
Step 5: Multiply the result from step 4 by 100% to get the percentage by mass of carbon in capsaicin.
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Molar Mass Calculation
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). To calculate the molar mass of a compound, sum the molar masses of all the atoms in its chemical formula. For capsaicin (C18H27NO3), this involves calculating the contributions from carbon, hydrogen, nitrogen, and oxygen based on their respective atomic masses.
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Percorso guidato
03:12
Molar Mass Calculation Example
Percentage by Mass
Percentage by mass is a way to express the concentration of an element within a compound. It is calculated by dividing the total mass of the element in the compound by the molar mass of the compound, then multiplying by 100. This provides a clear understanding of how much of the compound's mass is due to a specific element, such as carbon in capsaicin.
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Percorso guidato
00:38Mass Percent Calculation
Empirical and Molecular Formulas
The empirical formula represents the simplest whole-number ratio of elements in a compound, while the molecular formula shows the actual number of each type of atom in a molecule. Capsaicin's molecular formula (C18H27NO3) indicates the exact number of carbon, hydrogen, nitrogen, and oxygen atoms, which is essential for calculating the mass percentage of carbon accurately.
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Percorso guidato
02:26Empirical vs Molecular Formula
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