Domanda del libro di testo
If 6.02 * 1023 atoms of element Y have a mass of 83.80 g, what is the identity of Y?
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Ch.2 - Atoms, Molecules & Ions
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 2, Problema 129
If 4.61 * 10^21 atoms of element Z have a mass of 0.815 g, what is the identity of Z?
Guida verificata passo dopo passo1
Step 1: Calculate the number of moles of element Z using Avogadro's number. Avogadro's number is approximately 6.022 x 10^23 atoms/mol. Use the formula: \( \text{moles of Z} = \frac{\text{number of atoms}}{\text{Avogadro's number}} \).
Step 2: Substitute the given number of atoms (4.61 x 10^21) into the formula to find the moles of Z.
Step 3: Calculate the molar mass of element Z using the mass given (0.815 g) and the moles calculated in Step 2. Use the formula: \( \text{molar mass} = \frac{\text{mass}}{\text{moles}} \).
Step 4: Substitute the values from Step 2 and the given mass into the formula to find the molar mass of Z.
Step 5: Compare the calculated molar mass to known molar masses of elements on the periodic table to identify element Z.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Avogadro's Number
Avogadro's number, approximately 6.022 x 10^23, is the number of atoms, molecules, or particles in one mole of a substance. This concept is crucial for converting between the number of atoms and the amount of substance in grams, allowing us to relate the microscopic scale of atoms to the macroscopic scale of grams.
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Percorso guidato
02:11
Avogadro's Law
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 identifying elements based on their mass and the number of atoms present, as it allows us to calculate the mass of a given number of atoms and determine the identity of the element.
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Percorso guidato
02:11Molar Mass Concept
Stoichiometry
Stoichiometry is the branch of chemistry that deals with the quantitative relationships between reactants and products in chemical reactions. In this context, it helps us understand how to use the number of atoms and their corresponding mass to find the identity of element Z by relating these quantities to its molar mass.
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Percorso guidato
01:16Stoichiometry Concept
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