Chemistry concepts and calculations

4. Which of the following are good leaving groups? (Circle a that apply) eak bas

4. Which of the following are good leaving groups? (Circle a that apply) eak bases Weak acids OH H2O Br F- H CH 2- HSO 4- 5. Which of the following are good nucleophiles? (Circle …

4. Which of the following is an aldehyde? A. CH3CH2CH2CHO B. CH3CH2CH-O-CH3 C. C

4. Which of the following is an aldehyde? A. CH3CH2CH2CHO B. CH3CH2CH-O-CH3 C. CH3CH2CH2COH D. CH3CH2CH2CNH2 8. Amino acids are named based on the identity of their ___ ___. A. ca…

4. Which of the following processes will lead to a decrease in the entropy of th

4. Which of the following processes will lead to a decrease in the entropy of the system? a. Salt crystals dissolve in water. b. Air escapes from a hole in a balloon. c. Iron and …

4. Which of the following reactions involves overall definitive sxnaddition acro

4. Which of the following reactions involves overall definitive sxnaddition across an alkene? RR"PhCO2Ag. l2 " KOH Ho R R' R" benzene OH 1) 1 eq. Phl(OAc)2" 0.2 eq. LiBr OH AcOH, …

4. Which of the following statements about deshiel A) The about deshielded mucle

4. Which of the following statements about deshiel A) The about deshielded muclei is lals nucleus to required for the nucleus to achieve resonance experi spin-fliphmucleus, the mo…

4. Which of the following statements concerning the initiation stage of a radica

4. Which of the following statements concerning the initiation stage of a radical chain mechanism is true? a. At least one bgmolvtic cleavage event must occur. b. The total number…

4. Which of the following statements is true?: * A. The surface tension of a liq

4. Which of the following statements is true?: * A. The surface tension of a liquid is generally independent of temperature. B. The viscosity of a liquid is generally independent …

4. Which of the following statements is/are true about NP-complete problems? (Pl

4. Which of the following statements is/are true about NP-complete problems? (Please circle all that apply.) a. NP-complete problems cannot be solved. b. NP-complete problems requ…

4. Which of these compounds is likely to be more reactive? 0 I. X Because II Its

4. Which of these compounds is likely to be more reactive? 0 I. X Because II Its bond angles are too far away from the normal bond angle IV. All the hydrogens are eclipsed V. All …

4. Which one of the following compounds is the strongest base? A) I B) II C) III

4. Which one of the following compounds is the strongest base? A) I B) II C) III D) IV E) III & IV 5. Chloroquine is used as an antimalarial drug. Rank the three nitrogen atom…

4. Which one of the following compounds is the strongest base? A) I B) II C) III

4. Which one of the following compounds is the strongest base? A) I B) II C) III D) IV E) III & IV 5. Chloroquine is used as an antimalarial drug. Rank the three nitrogen atom…

4. Which one of the following is not a redox reaction? a. Na 6 FeCl 8 (s)+2Na(l)

4. Which one of the following is not a redox reaction? a. Na6FeCl8(s)+2Na(l) -- > 8NaCl(s)+Fe(s) b. Al(OH)3 (aq)+3H+ -- > Al3+(aq)+3H2O(l) c. CuCl2(aq)+Ni(s) -- > Cu(s)+N…

4. Which reactions are redox reactions? Choose at least one answer. A. hydrochlo

4. Which reactions are redox reactions? Choose at least one answer. A. hydrochloric acid reacting with nickel metal to form hydrogen gas and aqueous nickel(II) chloride B. sodium …

4. Which statement about an oxidant and its corresponding reducing agent is corr

4. Which statement about an oxidant and its corresponding reducing agent is correct? Example: In the reaction K+(aq) + e K(s) K+ is the oxidant and K(s) is its corresponding reduc…

4. Which statement concerning relative rates of reaction is correct for the chem

4. Which statement concerning relative rates of reaction is correct for the chemical equation given below? 2 CH3OH(g) + 3 O2(g) 2 CO2(g) + 4 H2O(g) a. The rate of disappearance of…

4. Which statement concerning relative rates of reaction is correct for the chem

4. Which statement concerning relative rates of reaction is correct for the chemical equation given below? 2 CH3OH(g) + 3 O2(g) 2 CO2(g) + 4 H2O(g) a. The rate of disappearance of…

4. Which two electron configurations represent elements that would have similar

4. Which two electron configurations represent elements that would have similar chemical properties? (1) 1s22s22p4       (2) 1s22s22p5       (3) [Ar]4s23d5       (4) [Ar]4s23d104p…

4. Why does naproxen need to be protonated before using on the TLC plates? 5. A

4. Why does naproxen need to be protonated before using on the TLC plates? 5. A student spots an unknown sample on a TLC plate. After developing in hexanesiethyl acetate 50:50. he…

4. Why is it important to a. avoid inhaling vapors of organic solvents? b. know

4. Why is it important to a. avoid inhaling vapors of organic solvents? b. know the location and operating instructions of the nearest fire extinguisher when using 95% ethanol or …

4. Why should melting point apparatus be unplugged when not inuseUs pt. 5. When

4. Why should melting point apparatus be unplugged when not inuseUs pt. 5. When taking a melting point, why should the temperature rate of increase not be too rapid? (0 6. In tryi…

4. Why should melting point apparatus be unplugged when not inuseUs pt. 5. When

4. Why should melting point apparatus be unplugged when not inuseUs pt. 5. When taking a melting point, why should the temperature rate of increase not be too rapid? (0 6. In tryi…

4. Why were they retained? 5. Fresh water (like in Lake Michigan) has a very low

4. Why were they retained? 5. Fresh water (like in Lake Michigan) has a very low concentration of dissolved materials in it. So it has a low osmotic pressure. Fresh water ponds an…

4. WorkUp and Purification (2 points): At which stage of the workup/purification

4. WorkUp and Purification (2 points): At which stage of the workup/purification are the following materials removed (extracted and/or destroyed) from the layer containing the des…

4. Write 4 properties of ceramics that are strongly influenced by defects. (5) 5

4. Write 4 properties of ceramics that are strongly influenced by defects. (5) 5. How are diffusion and ionic conduction related? (5) 6. Why can ceramic nanoparticles be considere…

4. Write 4 properties of ceramics that are strongly influenced by defects. (5) 5

4. Write 4 properties of ceramics that are strongly influenced by defects. (5) 5. How are diffusion and ionic conduction related? (5) 6. Why can ceramic nanoparticles be considere…

4. Write \"most\" under the one which would be most acidic. Write \"least\" unde

4. Write "most" under the one which would be most acidic. Write "least" under the one which would be least acidic. CICH COH Cl,CCH2COH CH3CCl2COH Write "most" under the one which …

4. Write a chemical equation for a neutralization reaction between H2SO4 (strong

4. Write a chemical equation for a neutralization reaction between H2SO4 (strong acid) and NH3 (weak base, Kb = 1.8 x 10-5). a. If they both start as 0.1 M solutions, what are the…

4. Write a function printPositive that takes a string representing the name of a

4. Write a function printPositive that takes a string representing the name of an input file as a parameter. The input file contains numbers (integer or floating point), one per l…

4. Write a program to find the number of comparisons using the binary search and

4. Write a program to find the number of comparisons using the binary search and sequential search algorithms as follows: Suppose list is an array of 1000 elements. a. Use a rando…

4. Write a simple program that allocates memory using malloc() but forgets to fr

4. Write a simple program that allocates memory using malloc() but forgets to free it before exiting. What happens when this program runs? Can you use gdb to find any problems wit…

4. Write down the word names for each of the compounds in the space provided. Ch

4. Write down the word names for each of the compounds in the space provided. Check your spellings. i)              Cr2O3       ii)             NH4CN              iii)            …

4. Write molecular and net ionic equations and write predictions before lab. lit

4. Write molecular and net ionic equations and write predictions before lab. lithium sulfate magnesium nitrate lithium sulfate sodium carbonate lithium sulfate sodium hydroxide li…

4. Write the balanced net ionic equations for the reactions that occur in each o

4. Write the balanced net ionic equations for the reactions that occur in each of the following cases. Identify the spectator ion or ions in each reaction. a. Cr2(SO4)3(aq) + 3(NH…

4. Write the name of the molecule that is described by each clue. (20 points) Ch

4. Write the name of the molecule that is described by each clue. (20 points) Choose from: cellulose, amylose, amylopectin, glycogen, maltose, isomaltose, cellobiose, isocellubios…

4. YOU HAVE AN UNLABELLED BOTTLE THAT CONTAINS ONE OF THE FOLLOWINGCOMPOUNDS: AM

4. YOU HAVE AN UNLABELLED BOTTLE THAT CONTAINS ONE OF THE FOLLOWINGCOMPOUNDS: AMMONIUM NITRATE, BARIUM CHLORIDE, SODIUM CHLORIDE YOU HAVE AVAILABLE TO YOU SOLUTIONS OF SILVER NITR…

4. You add solid calcium oxalate to 1 L of water until some solid remains at the

4. You add solid calcium oxalate to 1 L of water until some solid remains at the bottom of the beaker. The Ksp of calcium oxalate is 2.3 x 109 a. In the large circle to the right,…

4. You are a scientist working in a lab that processes pharmaceuticals. It\'s re

4. You are a scientist working in a lab that processes pharmaceuticals. It's recently been found that the Adderall that vour company sells may have a concentration that is dangero…

4. You are given an unknown hydrated metal salt containing bromide ion, MBr2.nH2

4. You are given an unknown hydrated metal salt containing bromide ion, MBr2.nH2O. a. You dissolve 0.500 g alibis salt in water and add excess Silver nitrate solution. AgNO3, to p…

4. You are given an unknown hydrated metal salt containing chloride ion, MCI nH,

4. You are given an unknown hydrated metal salt containing chloride ion, MCI nH,O You dissolve 0.500 g of this salt in water and add excess silver nitrate solution, AgNO, to preci…

4. You can base on the solubility, the charges, the hydrophobicity, the size, af

4. You can base on the solubility, the charges, the hydrophobicity, the size, affinity, and ultracentrifugation, electrophoresis to separate and analyze proteins. (a). The flow ra…

4. You carry out a synthesis in lab and obtain 2.11 g of a crude product. You de

4. You carry out a synthesis in lab and obtain 2.11 g of a crude product. You decide to purify your crude product with Solvent B although you have other solvents (Solvent A and So…

4. You carry out a synthesis in lab and obtain 2.11 g of a crude product. You de

4. You carry out a synthesis in lab and obtain 2.11 g of a crude product. You decide to purify your crude product with Solvent B although you have other solvents (Solvent A and So…

4. You characterize an enzyme that catalyzes the following reaction: By measurin

4. You characterize an enzyme that catalyzes the following reaction: By measuring equilibrium concentrations, you determine that Keq values for the reaction are 326 M, 378 M and 4…

4. You characterize an enzyme that catalyzes the following reaction: By measurin

4. You characterize an enzyme that catalyzes the following reaction: By measuring equilibrium concentrations, you determine that Keq values for the reaction are 326 M, 378 M and 4…

4. You characterize an enzyme that catalyzes the following reaction: By measurin

4. You characterize an enzyme that catalyzes the following reaction: By measuring equilibrium concentrations, you determine that Keq values for the reaction are 326 M, 378 M and 4…

4. You characterize an enzyme that catalyzes the following reaction: By measurin

4. You characterize an enzyme that catalyzes the following reaction: By measuring equilibrium concentrations, you determine that Keq values for the reaction are 326 M, 378 M and 4…

4. You have been employed by a local manufacturing company. In the back of an ol

4. You have been employed by a local manufacturing company. In the back of an old shed on the property you find a 10 L bottle containing some solvent mixture. On picking up a 2 ga…

4. You have several 1000.0 ml volumetric flasks, a 500g bottle of NaCl and a bot

4. You have several 1000.0 ml volumetric flasks, a 500g bottle of NaCl and a bottle of sucrose (C12H22O11) that is the same size. a. You measure out 100.0g of NaCl, put it into th…

4. You mix 50.0 mL of a weak monoprotic acid with 50.0 ml. of NaOH solution in a

4. You mix 50.0 mL of a weak monoprotic acid with 50.0 ml. of NaOH solution in a coffee cup calorimeter. Both solutions and the calorimeter were initially a temperature of 22.0 °C…

4. You mix a 123.0 mL sample of a solution that is 0.0121 M in NiCl2 with a 185.

4. You mix a 123.0 mL sample of a solution that is 0.0121 M in NiCl2 with a 185.0 mL sample of a solution that is 0.236 M in NH3. After the solution reaches equilibrium, what conc…