Domanda del libro di testo
A sample that weighs 107.75 g is a mixture of 30% helium atoms and 70% krypton atoms. How many particles are present in the sample?
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Ch.3 - Mass Relationships in Chemical Reactions
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Capitolo 3, Problema 61
Iron metal can be produced from the mineral hematite, Fe2O3, by reaction with carbon. How many kilograms of iron are present in 105 kg of hematite?
Guida verificata passo dopo passo1
Identify the chemical reaction: \( \text{Fe}_2\text{O}_3 + 3\text{C} \rightarrow 2\text{Fe} + 3\text{CO} \).
Calculate the molar mass of \( \text{Fe}_2\text{O}_3 \) using the atomic masses of Fe and O.
Determine the molar mass of iron (Fe).
Use stoichiometry to find the moles of iron produced from 1 mole of \( \text{Fe}_2\text{O}_3 \).
Convert the mass of \( \text{Fe}_2\text{O}_3 \) (105 kg) to moles, then use the stoichiometric ratio to find the mass of iron produced.
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Stoichiometry
Stoichiometry is the branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It allows us to calculate the amounts of substances consumed and produced in a reaction based on balanced chemical equations. Understanding stoichiometry is essential for determining how much iron can be produced from a given mass of hematite.
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Percorso guidato
01:16
Stoichiometry Concept
Molar Mass
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For hematite (Fe2O3), the molar mass can be calculated by summing the atomic masses of its constituent elements: iron (Fe) and oxygen (O). Knowing the molar mass is crucial for converting between mass and moles, which is necessary for stoichiometric calculations.
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Percorso guidato
02:11Molar Mass Concept
Reduction Reaction
A reduction reaction involves the gain of electrons or a decrease in oxidation state by a substance. In the context of producing iron from hematite, carbon acts as a reducing agent, converting Fe2O3 to iron (Fe) by removing oxygen. Understanding reduction reactions is vital for grasping how iron is extracted from its ore and the overall chemical process involved.
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Percorso guidato
01:53Oxidation and Reduction Reactions
Pratica correlata
Domanda del libro di testo
In the preparation of iron from hematite, Fe2O3 reacts with carbon:
Fe2O3 + C --> Fe + CO2 Unbalanced
(a) Balance the equation.
(b) How many moles of carbon are needed to react with 525 g of hematite?
(c) How many grams of carbon are needed to react with 525 g of hematite?
1590
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Domanda del libro di testo
Magnesium metal burns in oxygen to form magnesium oxide, MgO. (a) Write a balanced equation for the reaction.
1497
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Domanda del libro di testo
Titanium metal is obtained from the mineral rutile, TiO2. How many kilograms of rutile are needed to produce 100.0 kg of Ti?
1086
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Domanda del libro di testo
A sample that weighs 25.12 g contains 6.022⨉1023 particles. If 25.00% of the total number of particles are argon atoms and 75.00% are another element, what is the chemical identity of the other constituent?
635
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