Chemistry for Engineering Students
4th Edition
ISBN: 9781337398909
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Chapter 2, Problem 2.55PAE
2.55 What is a
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The following paragraph is a description of the fictional element melbournium (Mb).
Mb in its elemental form, is a solid at room temperature. There are 38 protons in its nucleus. The sample of Mb in my laboratory has 40 neutrons. Its electronegativity is 0.5. I have been told that there is only one other isotope of Mb with 38 neutrons (which is 50% abundant).
All the information you require about Mb to answer the questions below is supplied in the statement above (it is a fictional element, so it is not on The Periodic Table). Data for F (fluorine), mentioned below, can be sourced from the Periodic Table.
I. Determine the atomic number of Mb.
II. Determine the mass number of the isotope that I have in my lab.
III. Determine how many electrons are in Mb.
IV Write the full electronic configuration of Mb using the correct rules for the energy levels.
V. Will Mb gain or lose electrons (and how many) to form an octet? Why?
VI.…
Q) 3 answer the followings:
1) List the three statements that make up the modern atomic theory.
2) Which is larger, a proton or an electron?
3) Sketch a Lewis Electron Dot Diagrams of aluminum atom (Al), which has
atomic number = 13.
4) Give the formula for each molecule:
a. disulfur difluoride.
b. iodine penta bromide.
6) Give the proper name for each molecule:
a. P4O10
b. B2O3
c. P2S3
7) Assign oxidation state for the element that underlined in each of
the following compounds:
a.KNO3
b.AIH3
c.H2PO'4
1. An instructor gave you direction to construct a model of CH3CH2Br molecule by following the Experimental Procedure section of your experiment. First you will need to find the number of valence electrons in CH3CH2Br. The number of valence electrons in an atom of an element is said to be equal to the last digit in the group number of that element in the Periodic Table. Thus, what Groups are C, H, and Br in?
2.An instructor gave you direction to construct a model of CH3CH2Br molecule by following the Experimental Procedure section of your experiment. First you will need to find the number of valence electrons in CH3CH2Br. The number of valence electrons in an atom of an element is said to be equal to the last digit in the group number of that element in the Periodic Table.
The model consisted of balls and sticks. A ball has holes in it that represent how many bonds an atom can form. What kind of ball do you think should you use for the C atom and H atom?
3.An…
Chapter 2 Solutions
Chemistry for Engineering Students
Ch. 2 - Name at least three common polymers and give...Ch. 2 - Prob. 2COCh. 2 - Describe the nuclear model for the atom and...Ch. 2 - Prob. 4COCh. 2 - Prob. 5COCh. 2 - Prob. 6COCh. 2 - Prob. 7COCh. 2 - Prob. 8COCh. 2 - Prob. 9COCh. 2 - Prob. 10CO
Ch. 2 - Prob. 2.1PAECh. 2 - How do polymers compare to their respective...Ch. 2 - Look around you and identify several objects that...Ch. 2 - Prob. 2.4PAECh. 2 - The fact that a polymer’s physical properties...Ch. 2 - One application of conductive polymers is in...Ch. 2 - Prob. 2.7PAECh. 2 - Prob. 2.8PAECh. 2 - Why is the number of protons called the atomic...Ch. 2 - 2.10 Which isotope in each pair contains more...Ch. 2 - 2.11 Define the term isotope.Ch. 2 - 2.12 Write the complete atomic symbol for each of...Ch. 2 - 2.13 How many electrons, protons, and neutrons are...Ch. 2 - 2.14 Consider the following nuclear symbols. How...Ch. 2 - 2.15 Mercury is 16.716 times more massive than...Ch. 2 - The element gallium, used in gallium arsenide...Ch. 2 - 2.17 The atomic weight of copper is 63.55 amu....Ch. 2 - The following table presents the abundances and...Ch. 2 - 2.19 Naturally occurring uranium consists of two...Ch. 2 - Prob. 2.20PAECh. 2 - Prob. 2.21PAECh. 2 - 2.22 Provide the symbol of the following...Ch. 2 - Prob. 2.23PAECh. 2 - 2.24 Identify each of the following species as an...Ch. 2 - 2.25 Write the atomic symbol for the element whose...Ch. 2 - 2.26 In what region of the periodic table are you...Ch. 2 - Prob. 2.27PAECh. 2 - Prob. 2.28PAECh. 2 - Prob. 2.29PAECh. 2 - 2.30 Using Coulomb’s law, explain how the...Ch. 2 - Prob. 2.31PAECh. 2 - 2.32 Which of the following formulas contains the...Ch. 2 - Prob. 2.33PAECh. 2 - Prob. 2.34PAECh. 2 - Prob. 2.35PAECh. 2 - 2.36 Explain the difference between a molecular...Ch. 2 - 2.37 Why are empirical formulas preferred for...Ch. 2 - 2.38 The molecular formula for the ethylene...Ch. 2 - 239 Polybutadiene is a synthetic elastomer, or...Ch. 2 - 2.40 What distinguished the work of Mendeleev that...Ch. 2 - 2.41 How does the periodic table help to make the...Ch. 2 - 2.42 What is a period in the periodic table? From...Ch. 2 - 2.43 Name of the group to which each of the...Ch. 2 - Prob. 2.44PAECh. 2 - Prob. 2.45PAECh. 2 - 2.46 Why are nonmetals important even though they...Ch. 2 - Prob. 2.47PAECh. 2 - A materials engineer has filed for a patent for a...Ch. 2 - Prob. 2.49PAECh. 2 - 2.50 A materials engineer wants to make a new...Ch. 2 - Prob. 2.51PAECh. 2 - Prob. 2.52PAECh. 2 - 2.53 What is meant by the phrase organic...Ch. 2 - 2.54 Based on what you have learned in this...Ch. 2 - 2.55 What is a functional group? How does the...Ch. 2 - Prob. 2.56PAECh. 2 - Prob. 2.57PAECh. 2 - Prob. 2.58PAECh. 2 - 2.59 The accompanying figure shows the structure...Ch. 2 - Prob. 2.60PAECh. 2 - 2.61 Name the following covalent compounds: (a)...Ch. 2 - Prob. 2.62PAECh. 2 - Prob. 2.63PAECh. 2 - Prob. 2.64PAECh. 2 - Prob. 2.65PAECh. 2 - Prob. 2.66PAECh. 2 - Prob. 2.67PAECh. 2 - 2.68 What is a free radical? How are free radicals...Ch. 2 - Prob. 2.69PAECh. 2 - 2.70 Why do you think an inhibitor molecule is...Ch. 2 - 2.71 Use the web to determine the amount of...Ch. 2 - 2.72 How can an element have an atomic weight that...Ch. 2 - 2.73 Explain the concept of a “weighted” average...Ch. 2 - 2.74 The accompanying table provides the identity...Ch. 2 - 2.75 Chlorine has only two isotopes, one with mass...Ch. 2 - Prob. 2.76PAECh. 2 - Prob. 2.77PAECh. 2 - Prob. 2.78PAECh. 2 - Prob. 2.79PAECh. 2 - 2.80 Of the following elements, which two would...Ch. 2 - 2.81 How do binary compounds with hydrogen...Ch. 2 - Prob. 2.82PAECh. 2 - Prob. 2.83PAECh. 2 - 2.84 Early attempts to arrange the elements often...Ch. 2 - 2.85 Describe how the saying “opposites attract”...Ch. 2 - 2.86 For some uses, the relative abundance of...Ch. 2 - 2.87 What is the heaviest element to have an...Ch. 2 - 2.88 Describe how you can identify the isotope, X,...Ch. 2 - Prob. 2.89PAECh. 2 - 2.90 Naturally occurring europium has an average...Ch. 2 - 2.91 Strontium has four stable isotopes....Ch. 2 - 2.92 A candy manufacturer makes chocolate-covered...Ch. 2 - Prob. 2.93PAECh. 2 - 2.94 Use a molecular level description to...Ch. 2 - 2.95 Engineers who design bicycle frames are...Ch. 2 - 2.96 Use the web to look up the density of...Ch. 2 - 2.97 LDPE has a density in the range of...
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- 2.54 Based on what you have learned in this chapter, would you classify the chemistry of polymers as organic or inorganic? Why?arrow_forwardWhat is the fundamental difference between an organic substance and an inorganic substance? Write chemical formulas of three inorganic molecules that contain carbon.arrow_forwardThe “Chemistry in Focus” segment Sugar of Lead discusses Pb(C2H3O2)2 , which originally was known as sugar of lead. Why was it called sugar of lead? What is the systematic name for Pb(C2H3O2)2? Why is it necessary to have a system for the naming of chemical compounds?arrow_forward
- The figure shown below shows the structure of cytidine, one of the essential components of RNA. Write the correct molecular formula for the compound. (Enter the elements in the order: C, H, N, O). C9H10N3O5 C10H12N3O5 C8H9N3O5 C9H13N3O5arrow_forward2. How might the world be different if elements did not combine to form compounds?arrow_forward2.32 Which of the following diagrams represent diatomic molecules, polyatomic molecules, molecules that are not compounds, molecules that are compounds, or an elemental form of the substance? (b) (c)arrow_forward
- Which is a difference between molecular compounds and ionic compounds? X That's not right. Molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. Molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. Molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. Molecular compounds have high melting points and high boiling points, while ionic compounds are typicaly found as gases or low-melting solids and low-boiling liquids. Content attribution FEEDBACKarrow_forward7. Give the name for each of the following compounds, al of which contain polyatomicions. (xvi) Mg(OH)2 (xvii) (NH4)3PO4 (xviii) Sr(NO3)2 (хіx) Cи(СH3СО2)2 (хх) Rb2CO3 (ххі) К2Сr207(ххії) СаО2 (ххi) A{OH)з (xxiv) Fez(SO4)3 (ххV) Соз(РО4)2 (xxvi) AGCH3CO2 (xxvii) Hg(NO3)2 (хXvii) NaMnO4 (ххix) K2CrO: (ххх) Ai(CN)3arrow_forwardWhen dissolved in water, soap molecules (sodium carboxylate salt) dissociate into a cation and anion. In this experiment we will see the interactions these ions have with those in hard water. The use of "n" in a chemical formula indicates the number of repeating units. Select the cation and anion. Anion Cation 1. CH3(CH₂),COO™ (aq) 2. CH3(CH₂) (aq) 3. COONa+ (aq) 4. H+ (aq) 5. Na+ (aq) 6. CH2(CH2)nCOONa (s)arrow_forward
- 2. (i) State an example of a compound that is not a molecule and state an example of a molecule that is not a compound. Then, (ii) explain how you made your choices.arrow_forwardWhat differentiates an organic compound from an inorganic compound?arrow_forwardD. Formula CH CICH CI 1. Fill in the symbols of the elements in the structures of Molecule #9 and Molecule #10 below. In each molecule: • Carbon atom #1 is attached to a chlorine atom, a hydrogen atom, and a carbon atom. Carbon atom #2 is attached to a chlorine atom, a hydrogen atom, and a carbon atom. Carbon atom #1 and Carbon atom #2 are attached by a double bond. Molecule #9 and Molecule #10 are NOT mirror images and are different molecules. NOT Mirror Images Molecule #9 Molecule #10 1 2 C- C 1 2 C XXarrow_forward
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