Domanda del libro di testo
Calculate the percentage by mass of the indicated element in the following compounds: a. carbon in acetylene, C2H2, a gas used in welding
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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 26c
Brown 15th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 26cCapitolo 3, Problema 26c
Calculate the percentage by mass of the indicated element in the following compounds: c. hydrogen in ammonium sulfate, (NH4)2SO4, a substance used as a nitrogen fertilizer
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Determine the molar mass of ammonium sulfate, \((NH_4)_2SO_4\). This involves adding the atomic masses of all the atoms in the formula: 2 \(\times\) (14.01 \(\text{ g/mol for N}\) + 4 \(\times\) 1.01 \(\text{ g/mol for H}\)) + 32.07 \(\text{ g/mol for S}\) + 4 \(\times\) 16.00 \(\text{ g/mol for O}\).
Calculate the total mass of hydrogen in the compound. Since there are 8 hydrogen atoms in ammonium sulfate (each ammonium ion, \(NH_4^+\), contains 4 hydrogen atoms and there are two ammonium ions), multiply the number of hydrogen atoms by the atomic mass of hydrogen (1.01 g/mol).
Compute the percentage by mass of hydrogen in ammonium sulfate by dividing the total mass of hydrogen by the molar mass of ammonium sulfate and then multiplying by 100 to convert it to a percentage.
Ensure the units are consistent when performing the calculations to avoid any errors in the final percentage value.
Interpret the result as the mass percentage of hydrogen in ammonium sulfate, which indicates how much hydrogen contributes to the total mass of the compound.
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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 ammonium sulfate, (NH4)2SO4, this involves calculating the contributions from nitrogen, hydrogen, sulfur, and oxygen.
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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 provides a clear understanding of how much of the compound's mass is due to the specific element.
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Percorso guidato
00:38Mass Percent Calculation
Chemical Formula Interpretation
Understanding a chemical formula is crucial for identifying the number of each type of atom present in a compound. In (NH4)2SO4, the formula indicates there are two ammonium ions (NH4+) and one sulfate ion (SO4^2-). This knowledge is essential for accurately calculating the contributions of each element to the overall mass of the compound.
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Percorso guidato
03:13Intepreting the Band of Stability
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