Coordination Complexes of Cobalt Advanced Inorganic Chemistry Lab 02/27/2015 Abstract When the transition metal‚ cobalt‚ forms a complex involving a nitrate ion‚ the ligand has the ability to coordinate via N or O. The ability of the nitrate to attach via the N or O gives rise to the term‚ linkage isomers and can affect the functionality of the complex with other molecules. To explore structural differences between complexes‚ pentaaminechlorocobalt (III) chloride‚ pentaaminenitritocobalt (III)
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What You Need To Know for the Chemistry Regents Exam The Test The Chemisty Regents Exam is broken down into three sections: Part A: 35 mulitple choice questions from all units covered over the course of the school year. Part B: Approximately 25 questions‚ with a mix of short answer and multiple choice. Questions focus on the Reference Tables‚ graphing‚ and laboratory experiments. Part C: Approximately 15 short answer questions‚ most broken down into smaller parts. This is often an
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Aim: To examine a number of different chemical reactions and determine if they are exothermic or endothermic. Apparatus: • Test tubes {Around 10-12 in number} • Test-tube rack • Spatula • Digital thermometer { ± 0.1° C} • Digital balance {± 0.01 g} • Measuring cylinder {± 0.5cm³} • Different chemicals Introduction/Theory: Exothermic reactions are those reactions that release energy in the form of heat. Endothermic reactions need to absorb energy in the form
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............................................................................................ 3 4 Discussion........................................................................................................................................ 4 5 Conclusion ....................................................................................................................................... 4 1 1 INTRODUCTION This report elaborates on mechanical properties such as 0.2% Offset Proof Stress
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its cl2 or so4. bacl was precipitate ■ precipitate in bacl2 and naoh ■ Unknown 4 ● CuSo4 ○ bacl2 precip means so4 ○ blue color means copper ○ also paperclip looked copper colored when left in this solution ● Unknown 5 ● NH4NO3 or NH4Cl ○ nh4cl most likely ○ i agree with nh4cl ○ Reasoning? ○ if it was nh4no3 it would not form precipitate when you add agno3 im pretty sure ○ What else can we say about NH4Cl? ○ was there bubbles with hcl? if so‚ then
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C) 10-5 -10-9 3) D) 10-3 -10-5 E) 400-700 4) In the Bohr model of the atom‚ __________. A) electron paths are controlled by probability B) electrons travel in circular paths called orbitals C) electrons can have any energy D) electron energies are quantized E) both A and C 4) 5) According to the Heisenberg Uncertainty Principle‚ it is impossible to know precisely both the position and the __________ of an electron. A) mass B) shape C) momentum D) velocity E) color 5)
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creating contrast Can only be used on thin specimens Produces 2D image Magnification = x500‚000 Resolution = 0.2 nm Scan beam of electrons across specimen Beam bounces off surface of specimen Produces 3D image Magnification = x100‚000 Resolution = 5 nm (lower) Advantages Disadvantages Can produce coloured images Better resolution Better magnification Must be used in a vacuum (no air)- electrons are absorbed by molecules in air Expensive Training is required Natural colours
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estimate or calculate the density of the choices)? a. 1000 g of water at 4 oC b. 100.0 cm3 of chloroform‚ which weighs 148.9 g c. a 10.0 cm3 piece of wood weighing 7.72 g d. an ethyl alcohol ‑ water mixture of density 0.83 g/mL. __a___ 5. The scattering of alpha particles by thin metal foils established that a. the mass and positive charge of an atom are concentrated in the nucleus. b. electrons are fundamental particles of all matter c. all electrons have the same charge
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unpaired electrons. A) 4‚ 2 B) 0‚ 5 C) 2‚ 5 D) 6‚ 1 E) 4‚1 2. Which of the following would have to gain two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br A) Sr B) Br C) Sr‚ O‚ Se D) Na E) O‚ Se 3. The electron configuration of the S2- ion is __________. A) [Ne]3s23p2 B) [Ne]3s23p6 C) [Kr]3s22p-6 D) [Ar]3s23p2 E) [Ar]3s23p6 4. The ion NO- has __________ valence electrons. A) 10 B) 16 C) 12 D) 14 E) 15 5. The Lewis structure of PF3 shows
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Lab 5 –Cell Structure and Staining using Microscopy Instructions: Please download this MSWord document to your computer and answer the questions as asked. Then save the document and upload it to Bb using the Assignment feature provided. This assignment is worth a total of 100 points – there are 20 questions worth 5 points each. NAME Buket Rembert In Lab 3 you were introduced to microscopy. In this lab you will be adding to that experience by reviewing the differences in cell structure for Prokaryotes
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