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How many electrons are necessary to produce a charge of -11.0 C? What is the mass of this many electrons?
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Ch.2 - Atoms & Elements
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 47a
On a dry day, your body can accumulate static charge from walking across a carpet or from brushing your hair. If your body develops a charge of -22 µC (microcoulombs), how many excess electrons has it acquired?
Guida verificata passo dopo passo1
Understand that the charge of an electron is approximately \(-1.602 \times 10^{-19}\) coulombs.
Recognize that the total charge acquired by the body is \(-22 \mu C\), which is \(-22 \times 10^{-6}\) coulombs.
To find the number of excess electrons, divide the total charge by the charge of a single electron.
Set up the equation: \( \text{Number of electrons} = \frac{-22 \times 10^{-6} \text{ C}}{-1.602 \times 10^{-19} \text{ C/electron}} \).
Calculate the result from the equation to find the number of excess electrons.
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Charge and Coulombs
Charge is a fundamental property of matter that causes it to experience a force in an electromagnetic field. The unit of charge is the coulomb (C), where 1 coulomb is equivalent to the charge of approximately 6.242 x 10^18 electrons. In this context, microcoulombs (µC) are used, where 1 µC equals 10^-6 coulombs.
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Percorso guidato
01:15
Coulomb's Law Concept 2
Electrons and Their Charge
Electrons are subatomic particles with a negative charge of approximately -1.602 x 10^-19 coulombs. When an object accumulates a negative charge, it indicates an excess of electrons. To find the number of excess electrons, one can divide the total charge in coulombs by the charge of a single electron.
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Percorso guidato
01:53Formal Charge
Calculating Excess Electrons
To determine the number of excess electrons acquired by a charged object, the formula used is: Number of electrons = Total charge (in coulombs) / Charge of one electron. For example, if the body has a charge of -22 µC, this value must first be converted to coulombs, and then divided by the charge of an electron to find the total number of excess electrons.
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01:26Electron Capture
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Domanda del libro di testo
On a dry day, your body can accumulate static charge from walking across a carpet or from brushing your hair. If your body develops a charge of -22 mC (microcoulombs), what is their collective mass?
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Domanda del libro di testo
Which statements about subatomic particles are true? a. If an atom has an equal number of protons and electrons, it will be charge-neutral. b. Electrons are attracted to protons. c. Electrons are much lighter than neutrons. d. Protons have twice the mass of neutrons.
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Domanda del libro di testo
Which statements are inconsistent with Rutherford's nuclear theory as it was originally stated? Why? a. Since electrons are smaller than protons, and since a hydrogen atom contains only one proton and one electron, it must follow that the volume of a hydrogen atom is mostly due to the proton. b. A nitrogen atom has 7 protons in its nucleus and 7 electrons outside of its nucleus. c. A phosphorus atom has 15 protons in its nucleus and 150 electrons outside of its nucleus. d. The majority of the mass of a fluorine atom is due to its 9 electrons.
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Domanda del libro di testo
Imagine a unit of charge called the zorg. A chemist performs the oil drop experiment and measures the charge of each drop in zorgs. Based on the results shown here, what is the charge of the electron in zorgs (z)? How many electrons are in each drop?
Drop # Charge
A –4.8×10–9 z
B –9.6×10–9 z
C –6.4×10–9 z
D –12.8×10–9 z
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Domanda del libro di testo
A chemist in an imaginary universe, where electrons have a different charge than they do in our universe, performs the Millikan oil drop experiment to measure the electron's charge. The charges of several drops are recorded here. What is the charge of the electron in this imaginary universe?
Drop # Charge
A –6.9×10–19 C
B –9.2×10–19 C
C –11.5×10–19 C
D –4.6×10–19 C
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