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Brown & Holme - Chemistry for Eng Students 5/e (Homework)

James Finch

Chemistry - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : – / 41

Due : Friday, February 1, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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  • Instructions

    Brown/Holme's CHEMISTRY FOR ENGINEERING STUDENTS, 5th Edition, provides a concise, thorough and relevant introduction to chemistry, preparing students for further study in any engineering field. Using applications specifically geared toward engineering students, the text emphasizes the connection between molecular properties and observable physical properties and the linkages between chemistry and other subjects in the engineering curriculum such as mathematics and physics. The text includes added coverage of new engineering applications relevant to sustainability, including alternative energy and batteries. This new edition is supported by WebAssign, which helps students grasp chemistry concepts in an environment that can be customized for every classroom.

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1. –/4 points BHChemEng5 1.4.EOC.038. My Notes
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  • WebAssign includes textbook problems with algorithmically generated context, chemicals, and numerical values. This is useful for ensuring academic honesty, but also gives students the opportunity to review using different versions of a problem.
(a)
Express 330.°C in K.
WebAssign will check your answer for the correct number of significant figures. K
(b)
Express 59.37 K in °C.
WebAssign will check your answer for the correct number of significant figures. °C
(c)
Express −37.7°C in °F.
WebAssign will check your answer for the correct number of significant figures. °F
(d)
Express 151.2°F in K.
WebAssign will check your answer for the correct number of significant figures. K
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2. –/4 points BHChemEng5 2.7.EOC.064. My Notes
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  • WebAssign includes textbook problems with algorithmically generated context, chemicals, and numerical values. This is useful for ensuring academic honesty, but also gives students the opportunity to review using different versions of a problem.
Provide systematic names for each of the following ionic compounds. (Enter your answers in the format "sodium oxide", "phosphorus trichloride", or "iron(II) chloride".)
(a)
K2S
(b)
MgSO4
(c)
(NH4)3PO4
(d)
Sr(ClO2)2
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3. –/2 points BHChemEng5 5.4.EOC.044. My Notes
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  • Read It links are available as a learning tool under each question so students can quickly jump to the corresponding section of the eTextbook.
An experiment is being carried out to test the removal of sulfur dioxide from gases being released by a power plant. The initial sample, which contains only carbon dioxide and sulfur dioxide, occupies a volume of 36.2 L at a temperature of 45°C and a pressure of 725 torr. After all of the SO2 has been removed, the sample occupies a volume of 24.0 L at a temperature of 32°C and a pressure of 725 torr.
Determine the partial pressures (in torr) of both CO2 and SO2 in the initial sample.
P(CO2) = WebAssign will check your answer for the correct number of significant figures. torr P(SO2) = WebAssign will check your answer for the correct number of significant figures. torr
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4. –/3 points BHChemEng5 3.CV.001. My Notes
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  • Concept videos (CV) offer engaging, animated introductions to key topics. Each is accompanied by multiple choice questions that ensure students understand the material covered in the video.
Use the following video to answer the questions below.
Why is it necessary to balance chemical equations?
    
What does balancing a chemical equation involve?
    
Why is it important to check your work after balancing an equation?
    
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5. –/12 points BHChemEng5 2.DWB.02.001. My Notes
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  • Digital workbooks (DWB) combine reading with interactives and assessment to help students get the most out of reading assignments.
Nuclei
The atomic nucleus has had an immense impact on society over the past 100 years. The properties of atomic nuclei can be used for many beneficial applications in areas such as energy generation, medicine, chemical analysis, and archaeology. But there are also dangers—radiation from nuclei can have harmful effects, and energy from nuclear reactions can be harnessed for devastating weapons. It's therefore important to gain a deeper understanding of the atomic nucleus. In this lesson we'll describe the basic structure of the nucleus.
Part 1 of 5
Let's start by reviewing what we know about atoms. At the center of the atom is a compact, massive nucleusthe relatively massive core of an atom, which is surrounded by electrons; consists of protons and neutrons. What subatomic particle(s) are located in the nucleus of an atom?
    
What surrounds the nucleus?
    
Protons are positively charged, electrons negatively charged, and neutrons neutral (zero charge). Protons and neutrons are nearly the same mass, but they are about 1,800 times more massive than electrons. Below is a table that gives the masses and charges of protons, neutrons, and electrons. Because the masses are so small, chemists often use the atomic mass unita unit of mass equal to 1.6605 ✕ 10−27 kg, which is comparable to the masses of the proton and the neutron.. The atomic mass unit is abbreviated "amu" or "u", and 1 u is about equal to 1.6605 ✕ 10−27 kg.
Particle Mass (u) Charge
Electron 0.00055 −1
Proton 1.0073 +1
Neutron 1.0087 0


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6. –/1 points BHChemEng5 3.M.05.001.TUT. My Notes
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  • This question includes a Master It tutorial. When students get stuck, they can launch the self-paced tutorial by clicking on Master It and walk through the steps to solve a similar problem.
Solution Concentration
A solution is made by dissolving 21.5 g of ammonium chloride, NH4Cl, in enough water to make exactly 250. mL of solution.
Calculate the concentration (molarity) of NH4Cl in mol/L (M).
WebAssign will check your answer for the correct number of significant figures. M

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7. –/2 points BHChemEng5 3.5.EOC.057. My Notes
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  • In order to help students develop problem-solving skills, this question features a Watch It solution video that walks through the steps to solve the problem and reviews key chemical concepts. Watch It videos were made in consultation with textbook authors so that the approach and terminology aligns with the text narrative.
An organic acid is composed of carbon (60.87%), hydrogen (4.38%), and oxygen (34.75%). Its molar mass is approximately 138.1 g/mol.
Determine the empirical and molecular formulas of the acid. (Enter the elements in the order: C, H, O.)
Empirical formula

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Molecular formula

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8. –/4 points BHChemEng5 2.7.EOC.063. My Notes
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  • Students enter chemical formulas in WebAssign using the ChemPad tool. ChemPad is designed to offer feedback on common errors.
Write the molecular formula for each of the following covalent compounds.
(a)
tellurium tetrafluoride

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(b)
iodine pentafluoride

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(c)
disulfur dibromide

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(d)
dinitrogen difluoride

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9. –/5 points BHChemEng5 6.5.EOC.048. My Notes
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  • Students enter electron configurations in WebAssign using the ChemPad tool. ChemPad is designed to offer feedback on common errors.
Write the ground state electron configuration for the following neutral atoms. (Enter your answer in the form 1s2 2s2 2p6, and so on.)
(a)
C

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(b)
Cl

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(c)
Se

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(d)
I

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(e)
Rn

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10. –/4 points BHChemEng5 13.2.EOC.005. My Notes
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  • Students enter chemical reactions in WebAssign using the ChemPad tool. ChemPad is designed to offer feedback on common errors, such as unbalanced reactions.
For the following oxidation-reduction reactions, identify the half-reactions. (Include states-of-matter under the given conditions in your answer. Use the lowest possible coefficients.)
(a)
Cu(s) + Cd2+(aq) → Cd(s) + Cu2+(aq)
oxidation

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reduction

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(b)
2 Cr3+(aq) + 3 Mn(s) → 3 Mn2+(aq) + 2 Cr(s)
oxidation

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reduction

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