Domanda del libro di testo
The reaction of tungsten hexachloride (WCl6) with bismuth gives hexatungsten dodecachloride (W6Cl12).
WCl6 + Bi → W6Cl12 + BiCl3 Unbalanced
(b) How many grams of bismuth react with 150.0 g of WCl6?
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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
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McMurry 8th EditionCh.3 - Mass Relationships in Chemical ReactionsProblema 85a
McMurry 8th EditionCh.3 - Mass Relationships in Chemical ReactionsProblema 85aCapitolo 3, Problema 85a
Sodium borohydride, NaBH4, a substance used in the synthesis of many pharmaceutical agents, can be prepared by reaction of NaH with B2H6 according to the equation 2 NaH + B2H6 → 2 NaBH4
(a) How many grams of NaBH4 can be prepared by reaction between 8.55 g of NaH and 6.75 g of B2H6?
Guida verificata passo dopo passo1
Calculate the molar mass of NaH and B_2H_6 using the atomic masses of Na, B, and H.
Convert the given masses of NaH and B_2H_6 to moles by dividing by their respective molar masses.
Determine the limiting reactant by comparing the mole ratio of NaH to B_2H_6 from the balanced equation with the moles calculated.
Use the moles of the limiting reactant to calculate the moles of NaBH_4 produced, based on the stoichiometry of the balanced equation.
Convert the moles of NaBH_4 to grams by multiplying by its molar mass.
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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 chemists to predict how much of each substance is consumed or produced based on balanced chemical equations. In this case, understanding the stoichiometric coefficients from the reaction equation is essential to determine the limiting reactant and calculate the mass of NaBH4 produced.
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Percorso guidato
01:16
Stoichiometry Concept
Limiting Reactant
The limiting reactant is the substance that is completely consumed first in a chemical reaction, thus determining the maximum amount of product that can be formed. Identifying the limiting reactant is crucial for accurate calculations in stoichiometry, as it dictates how much of the product can be produced from the available reactants. In this question, one must compare the moles of NaH and B2H6 to find which one limits the formation of NaBH4.
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Percorso guidato
01:30Limiting Reagent Concept
Molar Mass
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is essential for converting between the mass of a substance and the number of moles, which is necessary for stoichiometric calculations. In this problem, calculating the molar masses of NaH and B2H6 will enable the conversion of the given masses into moles, facilitating the determination of the limiting reactant and the amount of NaBH4 produced.
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Percorso guidato
02:11Molar Mass Concept
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Domanda del libro di testo
The reaction of tungsten hexachloride (WCl6) with bismuth gives hexatungsten dodecachloride (W6Cl12).
WCl6 + Bi → W6Cl12 + BiCl3 Unbalanced
(c) When 228 g of WCl6 react with 175 g of Bi, how much W6Cl12 is formed based on the limiting reactant?
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Calculate the mass percent composition of each of the following substances. (a) Malachite, a copper-containing mineral: Cu2(OH)2CO3
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Domanda del libro di testo
Sodium borohydride, NaBH4, a substance used in the synthesis of many pharmaceutical agents, can be prepared by reaction of NaH with B2H6 according to the equation 2 NaH + B2H6 → 2 NaBH4
(b) Which reactant is limiting, and how many grams of the excess reactant will be left over?
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Domanda del libro di testo
The reaction of tungsten hexachloride (WCl6) with bismuth gives hexatungsten dodecachloride (W6Cl12).
WCl6 + Bi → W6Cl12 + BiCl3 Unbalanced
(a) Balance the equation.
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Urea, a substance commonly used as a fertilizer, has the for-mula CH4N2O. What is its percent composition by mass?
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