M4 Problem Set

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Portage Learning *

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Chemistry

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Jan 9, 2024

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M4: Problem Set Due No due date Points 5 Questions 6 Time Limit None Instructions You may find the following resources helpful while working through these problem sets: %20Equation%20Bank%5B820719%5D.pdf) Attempt History Attempt Time Score LATEST Attempt 1 2,535 minutes 5outof 5 Score for this quiz: 5 out of 5 Submitted Dec 11 at 12:47pm This attempt took 2,535 minutes. Question 1 0/0 pts What will be the charge of the ion formed from each of these atoms? Explain your answer. 1)As33 2) Gesz
Your Answer: 1) As33 (nonmetal = gain electrons) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3 gain 3 As-3 2) Ge32 (metal = lose electrons) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2 lose 4 Get+4 1) As33 (nonmetal = gain electrons) 1s? 2s? 2p°® 3s2 3p° 4s2 3d"% 4p3 gain 3 As™ 2) Ge;, (metal = lose electrons) 1s? 2s? 2p°® 3s? 3p°® 4s2 3d1° 4p? lose 4 Ge™ Question 2 0/0 pts Using the electronegativity values from the equation bank, show the determination of the polarity of each different type of bond in the following molecules: 1)
2) Your Answer: 1) CI-O bond electronegativity difference = 3.5 - 3.0 = 0.5 (1.6 - 0.5 bond is Polar) H-O bond electronegativity difference = 3.5-2.1=1.4(1.6-0.5 bond is Polar) 2) C=N bond electronegativity difference =3.0-2.5=0.5 (1.6 - 0.5 bond is Polar) H-C bond electronegativity difference =2.5-2.1=0.4 (< 0.5 bond is Nonpolar) 1) CI-O bond electronegativity difference =3.5-3.0=0.5 (1.6 - 0.5 bond is Polar) H-O bond electronegativity difference =3.5-21=14 (1.6 - 0.5 bond is Polar) 2) C=N bond electronegativity difference =3.0-2.5=0.5 (1.6 - 0.5 bond is Polar) H-C bond electronegativity difference =2.5-2.1=0.4 (< 0.5 bond is Nonpolar) Question 3 0/0 pts
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The linked document provides instructions on how to draw Lewis Structures that you will need to be able to do the following problems. How to Draw Lewis Structures (https://portagelearning.instructure.com/courses/1952/files/637411/download wrap=1). | (https://portagelearning.instructure.com/courses/1952/files/637411/download download_frd=1) Write Lewis dot structures and structural formulas for the following molecules. Compare your drawings to the answers in the key. 1) NH3 Write Lewis structures for the following polyatomic ions. Compare your drawings to the answers in the key. 2) SO42 q b Your Answer: 1) H:N:H = HENEH . I H H 2) O o-ls—fo
Question 4 0/0 pts Determine and explain for each of the materials below (a) Electron geometry of a Central atom, (b) Hybridization of a Central atom, (c) Shape of the Molecule, (d) Molecular Polarity 1) PH3 2) HCN Your Answer:
1.) PH3 4 Groups of electrons around P = Tetrahedral Electron Geometry Tetrahedral Electron Geometry = sp3 Hybridization of P 3 atoms around central Tetrahedral atom = Triangular pyramid shape P-H bond (2.1-2.1) is nonpolar = all nonpolar bonds = Nonpolar molecular polarity 2.) HCN 2 Groups of electrons around C = Linear Electron Geometry Linear Electron Geometry = sp Hybridization of C 2 atoms around central Linear atom = Linear shape CH bond (2.5-2.1) is nonpolar C=N bond (3.0- 2.5) is polar = at least one polar bonds = Polar molecular polarity 1) PH3 4 Groups of electrons around P = Tetrahedral Electron Geometry Tetrahedral Electron Geometry = sp® Hybridization of P 3 atoms around central Tetrahedral atom = Triangular pyramid shape P-H bond (2.1-2.1) is nonpolar = all nonpolar bonds = Nonpolar molecular polarity 2) HCN 2 Groups of electrons around C = Linear Electron Geometry Linear Electron Geometry = sp Hybridization of C 2 atoms around central Linear atom = Linear shape CH bond (2.5-2.1) is nonpolar C=N bond (3.0-2.5) is polar = at least one polar bonds = Polar molecular polarity Question 5 0/0 pts
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Rank the following materials from highest BP to lowest BP 1. No, NaF, NH3, Ni, HI Explain whether the following material is polar, ionic, or nonpolar. Describe whether it is soluble or insoluble in water. 2.0, Your Answer: 1) Highest BP: Ni = NaF (metallic, ionic) NH3 (H-bonding) HI (polar) Lowest BP: N2 (nonpolar) 2) O2 = nonpolar, insoluble 1. Ni = NaF > NH; > HI > N, metallic, ionic H-bonding polar nonpolar 2. 0, One nonpolar bond (O-0) = Nonpolar Water insoluble since nonpolar Question 6 9/5 pts As a reminder, the questions in this review quiz are a requirement of the course and the best way to prepare for the module exam. Did you complete all questions in their entirety and show your work? Your Answer: Yes v
Quiz Score: 5 out of 5