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engineering A construction company bought a 180,000 metric ton earth sifter at a cost of $65,000. The company expects to keep the equipment a maximum of 7 years. The operating cost is expected to follow the series described by 40,000 + 10,000k, where k is the number of years since it was purchased$ $( k = 1,2 , \dots , 7 )$ $. The salvage value is estimated to be$30,000 for years 1 and 2 and $20,000 for years 3 through 7. At an interest rate of 10% per year, determine the economic service life and the associated equivalent annual cost of the sifter. Verified answer
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Terms in this set (46)Which of the following compounds have resonance structures? D) O3 Consider the Lewis structures for the compound SO3 and the polyatomic ions SO32- and SO42-. Which of these would exist as a set of resonance structures? A) SO3 only What is the angle between electron groups in the linear electron geometry D) 180 What is the angle between electron groups in the trigonal planar electron geometry? 120° What is the angle between electron groups in the tetrahedral geometry? 109.5° What is the electron geometry if you have 2 electron groups around the center atom? A) linear What is the electron geometry if you have 3 electron groups around the center atom? B) trigonal planar What is the molecular geometry if you have 3 single bonds and 1 lone pair around the central atom? D) trigonal pyramidal Which of the following compounds would have a linear molecular geometry? B) 1 and 3 only What is the molecular geometry of carbon dioxide, CO2? B) linear 11) What is the correct Lewis structure for CN⁻? D) [: C≡ N :]⁻ Which symbol should be used between two structures that represent resonance structures? C) ↔ Which of the statements about light is FALSE? E) All of the above statements are true. The distance between adjacent wave crests is called wavelength The number of cycles of a wave that passes a stationary point in one second is called its frequency Which color of the visible spectrum has the longest wavelength (750 nm)? Red Which color of the visible spectrum has photons with the most energy? Violete Which form of electromagnetic radiation has the highest frequency? Gamma rays Which form of electromagnetic radiation has the lowest frequency? Radio waves The n = ________ principal shell is the lowest that may contain a d-subshell. 3 Which subshell letter corresponds to a spherical orbital? S When filling orbitals of equal energy, electrons fill them singly first with parallel spins." This is known as: Hunds Rule An accepted abbreviation format is to write an electron configuration that includes a noble gas symbol in brackets. If you were writing an electron configuration for a bromine atom, which elemental symbol would you place in the bracket? Ar Which element is represented by the electron configuration 1s22s22p2? Carbon What is the electron configuration for Kr? 1s22s22p63s23p64s23d104p6 What do the alkali metals all have in common? All of the above Which of the following elements has the electron configuration of 3s23p4 in its outermost shell? C) S Chlorine and bromine have very similar chemical properties. This is best explained by the fact that both elements C) have the same number of valence electrons. One mole of F2 gas at STP would take up twice the volume of one mole of Ar gas at STP. False If the number of gas particles is halved, the volume of the gas will be halved given that the temperature and pressure do not change. True 1 atm is equal to: E) all of the above What is the equivalent pressure of 1520 torr in units of atm? C) 2.00 What is the equivalent pressure of 760 torr in units of mm Hg? A) 760 Which of the following statements is TRUE for gases? Only 3 Boyle's Law is expressed as: A) V is proportional to 1/p 36) To solve problems using Boyle's Law, which mathematical equation should be used? B) P1V1 = P2V2 One liter of a gas is in a sealed chamber containing a moveable piston. If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter, what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.) C) The pressure will be twice the original value. A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth? B) 0.154 L To solve problems using Charles's Law, which mathematical equation should be used? A) A gas sample occupies 3.50 liters of volume at 20.°C. What volume will this gas occupy at 100.°C (reported to three significant figures)? C) 4.46 L A balloon originally had a volume of 0.439 L at 44°C and a pressure of 729 torr. To what temperature must the balloon be cooled to reduce its volume to 378 mL if the pressure remained constant? A) 0°C Avogadro's Law is expressed as: D) V is proportional to n 43) To solve problems using Avogadro's Law, which mathematical equation should be used? C A sample of 0.255 mole of gas has a volume of 748 mL at 28°C.
Calculate the pressure of this gas. A) 8.42 atm What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25°C? B) 36.7 atm 46) If a mixture of gases contained 78% nitrogen at a pressure of 984 torr and 22% carbon dioxide at 345 torr, what is the total pressure of the system? D) 1.75 atm Students also viewedChapter 10 - Chemical Bonding14 terms Clark_Driscoll2 chem CH 1020 terms afrancesca2 Study set 8 (test 3)22 terms aves1217 ch 1026 terms jazmin_orozco13 Sets found in the same folderUnit 5 Test20 terms sgregoire001 AP Chemistry Midterm Chapter 1031 terms sgregoire001 Chemistry test 154 terms Lorren_Bell74 CHEM 2 Test 1158 terms sam_romines Other sets by this creatorGovernment chapter 1-528 terms Lorren_Bell7 Spanish test 183 terms Lorren_Bell7 Verified questions
physics A solenoid $4.00 \mathrm{~cm}$ in diameter and $20.0 \mathrm{~cm}$ long has 250 turns and carries a current of $15.0 \mathrm{~A}$. Calculate the magnetic flux through the circular cross-sectional area of the solenoid. Verified answer
physics Suppose the generator connected to a series RCL circuit has a frequency that is greater than the resonant frequency of the circuit. Suppose, in addition, that it is necessary to match the resonant frequency of the circuit to the frequency of the generator. To accomplish this, should you add a second capacitor (a) in series or (b) in parallel with the one already present? Verified answer
physics A boat that travels at a speed of $6.75\ \mathrm{m/ s}$ in still water is to go directly across a river and back . The current flows at $0.50\ \mathrm{m/ s}$. (a) At what angle(s) must the boat be steered? (b) How long does it take to make the round trip? (Assume that the boat's speed is constant at all times, and neglect turnaround time.) Verified answer
chemistry Write formulas for all the ionic compounds that can be formed by combinations of these ions: ${Na}^{+}$, ${Ni}^{2+}$, ${SO_4}^{2-}$, and ${Cl}^{-}$. Verified answer Recommended textbook solutionsAtkins Physical Chemistry10th EditionJulio de Paula, Peter Atkins 1,315 solutions Principles of Environmental Chemistry3rd EditionJames Girard 371 solutions Organic Chemistry9th EditionJohn E. McMurry 1,920 solutions Chemistry: The Molecular Nature of Matter and Change6th EditionMartin S. Silberberg 2,958 solutions Other Quizlet setsChem chapter five21 terms Kayla_VanOsten CHM Exam 324 terms oliviawallen Chapter 5 Terms16 terms McleodSkylar Test 438 terms kmcher Which compound will have resonance structures?There is a double bond between one oxygen and the nitrogen, It can be found on the left oxygen or the right oxygen. Resonance structures are particularly common in oxoanions of the p-block elements, such as sulfate and phosphate, and in aromatic hydrocarbons, such as benzene and naphthalene.
Is CH4 a resonance structures?CH4 contains four C-H single bonds. In this molecule, the doublet of hydrogen and the octet of carbon is completely satisfied by a single arrangement. Thus, there is no possibility of resonance in this molecule.
What are resonance structures quizlet?What is a resonance structure? is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis structure.
Is CCl4 a resonance structure?CCl4 d. none of the compounds have resonance structures.
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Which of the following compounds have resonance structures Quizlet
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