Domanda del libro di testo
Calculate the percentage by mass of oxygen in the following compounds: (c) acetaminophen, C8H9NO2 (d) cyclopropanone, C3H4O
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Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
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Brown 14th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 25b
Brown 14th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 25bCapitolo 3, Problema 25b
Calculate the percentage by mass of oxygen in the following compounds: (b) isopropyl alcohol, C3H8O
Guida verificata passo dopo passo1
Step 1: Determine the molar mass of each element in the compound. The molar mass of carbon (C) is approximately 12.01 g/mol, hydrogen (H) is approximately 1.01 g/mol, and oxygen (O) is approximately 16.00 g/mol.
Step 2: Calculate the molar mass of the compound. Isopropyl alcohol, C3H8O, has 3 carbon atoms, 8 hydrogen atoms, and 1 oxygen atom. So, the molar mass of the compound is (3*12.01 g/mol) + (8*1.01 g/mol) + (1*16.00 g/mol).
Step 3: Calculate the total mass of oxygen in the compound. Since there is only one oxygen atom in the compound, the total mass of oxygen is 16.00 g/mol.
Step 4: Calculate the percentage by mass of oxygen in the compound. The formula to calculate the percentage by mass is (mass of the element / molar mass of the compound) * 100%.
Step 5: Substitute the values into the formula. The mass of oxygen is 16.00 g/mol and the molar mass of the compound is the value calculated in step 2. Substitute these values into the formula and calculate the percentage.
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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 atomic masses of all the atoms in its molecular formula. For isopropyl alcohol (C3H8O), this involves calculating the contributions from carbon (C), hydrogen (H), and oxygen (O) to find the total molar mass.
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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 in a compound. It is calculated by dividing the mass of the element in one mole of the compound by the total molar mass of the compound, then multiplying by 100. This gives a clear representation of how much of the compound's mass is due to a specific element, such as oxygen in isopropyl alcohol.
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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. Understanding the difference is crucial when calculating mass percentages, as the molecular formula (C3H8O) provides the exact composition needed for accurate molar mass and percentage calculations.
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Percorso guidato
02:26Empirical vs Molecular Formula
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