Chemistry concepts and calculations

1. Magnesium is an essential element for plants and animals. Someone comes up wi

1. Magnesium is an essential element for plants and animals. Someone comes up with an idea to use magnesium to precipitate iron in a small lake at the end of a short river that em…

1. Magnetic fields create magnetic field lines, just as an electric field create

1. Magnetic fields create magnetic field lines, just as an electric field creates electric field lines. The direction of the magnetic field is the direction in which the north pol…

1. Main group elements react so they end up with a. more electrons than they sta

1. Main group elements react so they end up with a. more electrons than they start with. b. fewer electrons than they start with. c. the same number of electrons as their group nu…

1. Make a graph of \"the effect of mobile-phase polarity on the Rf of ferrocene

1. Make a graph of "the effect of mobile-phase polarity on the Rf of ferrocene and acetylferrocene". You may use Excel or any other program; no hand-drawn graphs will be accepted.…

1. Make one table of reagents and one table of products for the experiment. (inc

1. Make one table of reagents and one table of products for the experiment. (including molecular weights, weight/volume needed, melting points, boiling points, hazards for each ch…

1. Many kidney stones contain calcium oxalate crystals that have separated from

1. Many kidney stones contain calcium oxalate crystals that have separated from the urine. Suppose you've developed kidney stones, and your doctor has determined they are mainly m…

1. Many of the reactions use 1 mL of solution. How can you estimate this volume?

1. Many of the reactions use 1 mL of solution. How can you estimate this volume? 2. Do you need to dry the test tubes before using them for the reactions in this experiment? Why o…

1. Many reactions we have been studying are reversible all the way through. Why

1. Many reactions we have been studying are reversible all the way through. Why is it important to know whether or not a reaction is reversible or not? (Think practically in a lab…

1. Mass Calculations: Theoretical vield Actual yield Percent yield 0.515 Show sh

1. Mass Calculations: Theoretical vield Actual yield Percent yield 0.515 Show show work for all calculations including determination of limiting reagent. If the yield was below ve…

1. Mass and Weight Scientists measure an object\'s mass in kilograms and its wei

1. Mass and Weight Scientists measure an object's mass in kilograms and its weight in Newtons. If you know the amount of mass that an object has, you can calculate its weight, in …

1. Mass of CuCl2 2H2O Beaker 1) .50g Beaker 2) .70g 2. Mass of Al (s) Beaker 1)

1. Mass of CuCl2 2H2O          Beaker 1) .50g          Beaker 2) .70g 2. Mass of Al (s)       Beaker 1) .25g       Beaker 2) .05 g 3. Mass of filter paper = .77g   4. mass of filt…

1. Mass of NaOH: 2.07g Mass of solution: 100g Final temperature: 27.98 degrees c

1. Mass of NaOH: 2.07g Mass of solution: 100g Final temperature: 27.98 degrees celcius Initial temp: 19.3 degrees celcius Change in temp: 8.68 degrees celcius Delta H/mol= ? 2. Ma…

1. Mass of fired crucible and lid (g) 2. Mass of fired crucible, lid, and hydrat

1. Mass of fired crucible and lid (g) 2. Mass of fired crucible, lid, and hydrated salt (g) 3. Instructor's approval of flame and apparatus 40 638 31, 5972 4. Mass of crucible, li…

1. Mastermind Mastermind is a code-breaking game for two players; play can be si

1. Mastermind Mastermind is a code-breaking game for two players; play can be simulated in text on a computer. Online versions exist and are useful for understanding how the game …

1. Mastermind Mastermind is a code-breaking game for two players; play can be si

1. Mastermind Mastermind is a code-breaking game for two players; play can be simulated in text on a computer. Online versions exist and are useful for understanding how the game …

1. Match each of the following enzymes or other molecules with its location(s) (

1. Match each of the following enzymes or other molecules with its location(s) (some may have more than one location) _______ pyruvate dehydrogenase _______ malate dehydrogenase _…

1. Match each of the following enzymes or other molecules with its location(s) (

1. Match each of the following enzymes or other molecules with its location(s) (some may have more than one location) _______ pyruvate dehydrogenase _______ malate dehydrogenase _…

1. Match each set of spectral data (1-5) to the correct compound (A-E) 2. Would

1. Match each set of spectral data (1-5) to the correct compound (A-E) 2. Would HRMS be useful to distinguish between compounds A-E of this matching section? Why or why not? 3. Wh…

1. Match the analytes on the left with the most appropriate stationary phase, ba

1.      Match the analytes on the left with the most appropriate stationary phase, based on the analyte properties: Answer          Analysis of metal cations in industrial waste  …

1. Match the antibiotic with the correct mechanism of action on the right. *Stre

1. Match the antibiotic with the correct mechanism of action on the right. *Streptomycin *Erythromycin *Chloramphenicol *Puromycin *Tetracycline A) inhibits the binding of aminoac…

1. Match the signature on the left with the correct method call on the right. If

1. Match the signature on the left with the correct method call on the right. If there are signatures that do not match any method, say so. Assume the following declarations have …

1. Match the statements with the compounds given below in the picture. (i) One o

1. Match the statements with the compounds given below in the picture. (i) One of the components in an oral contraceptive that contains a terminal alkyne and resembles a steroid. …

1. Materials are characterized by: a. Macroscopic properties b. Microstructure c

1. Materials are characterized by: a. Macroscopic properties b. Microstructure c. Atomic level composition d. All of the above 2. Atoms are: a. Discrete units of matter b. An abst…

1. Matt was heating his methanol solvent in an E. flask on a hot plate to use fo

1. Matt was heating his methanol solvent in an E. flask on a hot plate to use for recrystallization. The TA came by and noticed he didn’t have a stir stick or boiling chip in the …

1. Meet with the members of your team and write a procedure to collect and analy

1. Meet with the members of your team and write a procedure to collect and analyze four drinking water samples. Your procedure must include glassware, equipment, chemicals, chemic…

1. Megaco/H.248 and MGCP are primarily used to set up trunks between Media Gatew

1. Megaco/H.248 and MGCP are primarily used to set up trunks between Media Gateways True or False 2. The Media Gateway is responsible for setting up and terminating calls. True or…

1. Memory Allocation (Please explain why u chose the answer) 7. In a virtual mem

1. Memory Allocation (Please explain why u chose the answer) 7. In a virtual memory system with 5 physical pages and the following page reference string: 1, 2, 3, 4, 2, 1, 5, 6, 2…

1. Memory Allocation (Please explain why u chose the answer) Consider boundary-t

1. Memory Allocation (Please explain why u chose the answer) Consider boundary-tag dynamic memory allocation and dealloaction. Assume that there are 100 units of "space" in our he…

1. Memory requirements for a specific algorithm doesn\'t include which character

1. Memory requirements for a specific algorithm doesn't include which characteristic? A. Subsets of Complexity B. Finite memory C. Time requirements must be considered D. in theor…

1. Mercury is a silver-colored liquid. One gallon of mercury weighs 113.6 pounds

1. Mercury is a silver-colored liquid. One gallon of mercury weighs 113.6 pounds. Calculate the density of mercury in grams per milliliter. (Enter your answer to three significant…

1. Metal reactivity is different from nonmetal reactivity. In this lab you will

1. Metal reactivity is different from nonmetal reactivity. In this lab you will investigate metal reactivity and several other properties. How will the reactivity of metals be det…

1. Methanol (CH 4 O) can be made by a reaction between carbon monoxide gas and h

1. Methanol (CH4O) can be made by a reaction between carbon monoxide gas and hydrogen gas. Methanol is the only product of the reaction. a) Starting with 75.0 g of each reactant, …

1. Methanol and water are miscible, they because of the formation of a. do not m

1. Methanol and water are miscible, they because of the formation of a. do not mix together, ion-dipole moment b. do not mix together; hydrogen bond c. mix together, ion-dipole mo…

1. Methanol has the formula CH3OH and can be produced by the reaction of carbon

1. Methanol has the formula CH3OH and can be produced by the reaction of carbon monoxide with hydrogen gas. CO + 2 H2 <--> CH3OH + heat In an attempt to maximize the yield o…

1. Methyl red, HMR is a common acid-base indicator. In solution it ionizes accor

1. Methyl red, HMR is a common acid-base indicator. In solution it ionizes according to the equation: red yellow   If methyl red is added to distilled water, the solution turns ye…

1. Micelles . . . A. are used to solubilize exogenous lipids in the bile B. are

1. Micelles . . . A. are used to solubilize exogenous lipids in the bile B. are composed of lipid bilayers C. are the organelles where fatty acid synthesis occurs D. A, B, and C a…

1. Micropipetting, Dilutions, and Significant Figures. Seven hundred fifty micro

1. Micropipetting, Dilutions, and Significant Figures. Seven hundred fifty microliters of 200.0 µM NAD+ is added with an Eppendorf Research Plus P1000 to a microcentrifuge tube, f…

1. Microwave ovens work by irradiating food with microwave radiation. Microwaves

1. Microwave ovens work by irradiating food with microwave radiation. Microwaves are absorbed by polar molecules (mostly water) and physically rotate. The increased rotation is an…

1. Microwave radiation has wavelengths from 1.0×10-3 to 1.0 m, whereas the wavel

1. Microwave radiation has wavelengths from 1.0×10-3 to 1.0 m, whereas the wavelength region for infrared radiation is 1.0×10-6 to 1.0×10-3 m. We can say that: (higher than, lower…

1. Mineral oil is a non polar solvent. Why would this solvent be a poor choice t

1. Mineral oil is a non polar solvent. Why would this solvent be a poor choice to replace ethyl acetate in an extraction? (From a mixture of benzil and benzoic acid) 2. During an …

1. Modern computers include a memory hierarchy that include both larger quantiti

1. Modern computers include a memory hierarchy that include both larger quantities of slower memory and smaller quantities of faster memory. Which of the following accurately desc…

1. Modify the definition of the class Money shown in Display below so that the f

1. Modify the definition of the class Money shown in Display below so that the following are added: A) The operators < , <=, > , and >= have each been overloaded to ap…

1. Modify the fragment of pseudocode for i = 1 to A.length - 1; for j = A.length

1. Modify the fragment of pseudocode for i = 1 to A.length - 1; for j = A.length down to i + 1; if A[ j ] < A [j - 1]; exchange A[ j ] and A[j - 1]; so that it will implement b…

1. Modules created in vba can neither be deleted nor removed? true or false 2. S

1. Modules created in vba can neither be deleted nor removed? true or false 2. Scatter plots are the only type of plots in excel? true or false 3. input box accepts values from us…

1. Mognetic Flux There are three ways to change magnetic flux: change the area A

1. Mognetic Flux There are three ways to change magnetic flux: change the area A change the magnitude of magnetic field B, and change the orientation of plane e. Q.1 A square coil…

1. Molecular and atomic absorption have two very distinct and different spectra.

1. Molecular and atomic absorption have two very distinct and different spectra. Explain these differences– diagrams and sketches can assist in the explanation. 2. Calculate the w…

1. Molecular bromine gives slightly better yields compared to pyridinium tribomi

1. Molecular bromine gives slightly better yields compared to pyridinium tribomide. However, using pyridinium tribromide also generates pyridine hydrobromide as a side product whi…

1. Molecular formula: C3H6Br2 IR: 3000-2850 cm-1 1H NMR: 2.4 (quintet, 2H); 3.5

1. Molecular formula: C3H6Br2 IR: 3000-2850 cm-1 1H NMR: 2.4 (quintet, 2H); 3.5 (triplet, 4H) 2. Molecular formula: C5H10O2 IR: 1740 cm-1 1H NMR: 1.15 (triplet, 3H); 1.25 (triplet…

1. Molecular formula: C3H6Br2 IR: 3000-2850 cm-1 1H NMR: 2.4 (quintet, 2H); 3.5

1. Molecular formula: C3H6Br2 IR: 3000-2850 cm-1 1H NMR: 2.4 (quintet, 2H); 3.5 (triplet, 4H) 2. Molecular formula: C5H10O2 IR: 1740 cm-1 1H NMR: 1.15 (triplet, 3H); 1.25 (triplet…

1. Molecular orbitals extending over more than two atomsprovide an explanation f

1. Molecular orbitals extending over more than two atomsprovide an explanation for? 2. Which combination always results in a process beingspontaneous? A)H is negative and S is neg…