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Chemistry Questions and Answers September 09, 2019

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The density of a piece of ebony wood is 1.174 g/mL. What is the volume in quarts of a 2.0452 lb piece of this ebony wood?

Given x(t) = 12 cos(2 15,000t 60degrees) 20 cos(2 20,000t + 30degrees) 16 cos(2 30,000t 70degrees), plot (a) one-sided magnitude spectrum. (b) one-sided phase spectrum. (c) two-sided magnitude spectrum. (d) two-sided phase spectrum

Which member of the following set, Li, Na, or K would have the largest metallic character

Ca Directions Before you attempt this assignment, you should review the information on UMLs in the Online Resources and Videos in this module. Here is what you should do for this assignment: . Using Word or a text editor create UML for an airplane. . Include at least 4 attributes and at least 8 methods that describe the behavior of an airplane. .

What is the molecular geometry for ammonia (NH3)? Question 2 options: trigonal planar trigonal pyramidal bent see-saw tetrahedral Question 3 (2.5 points) When a double bond is formed between two atoms, one of the bonds is a bond and the other is a bond. The bond is created by the overlap of __? Question 3 options: sp2 hybrid orbitals sp3 hybrid

Is an ion pair consists of a free electrons and a postitively charged atom/molecule

I need help Fo H- OH H-OH pintos end al woled 40 -H 15. How would you characterize the following molecule? OH a. This is glucose b. This is an epimer of glucose c. This is a diastereomer of glucose d. This is an enantiomer of glucose 16. What is the name of the following glycosidic bond? a. a1-3 b. B1-2 c. a1-4 d. B1-6 17. What is required for a

Which substance is MOST likely an enzyme? A. proline B. stearic acid C. endopeptidase D. acetylcholine

What is the relationship between the calculated/theoretical number of particles in solution and the actual number of particles in solution? Choice 1 of 3:For salts, the number of theoretical particles is always greater than the actual number of particles. Choice 2 of 3:For salts, the number of theoretical particles is always equal to the actual

how some of these particles are different in normal atom and reactive atom. Isotopes Half-life of an isotope -be able to calculate and manipulate values or data when given about isotopes What is radiometric dating?

Missing is ethyne for answer choice d. Now have a look at the hydrocarbons below. Which compound is not present? H C H-C-C-C C HHC-H HC-C-H H H H H a) But-2-ene b) Ethene C Ethane

The formula for table sugar is C12H22O11. Is table sugar ionic or covalent? Question 1Select one: a. Table sugar is an element b. Table sugar is an ionic compound c. Table sugar is not a compound d. Table sugar is a covalent compound

Using the information in Chapter 8 and Box 8.6 as examples, calculate the nonacid ("base") saturation percentage for the soil sample in the following table: Table Element Concentration Total CEC (NH4+) 540 Ca 200 Mg 60 K 97.5 H 5 Al 67.5 amount of leachate 0.4 L amount of soil 100 g pick an answer 27.9% 58.3% 51.7% 73.5% 45.0% 15.0% 33.3% None of

Exercise 1 - Questions Question 1 Define the terms covalent bond Question 2 Use the periodic table to describe which elements form ionic bonds and which elements form covalent bonds. Describe at least ten ionic bonds and ten covalent bonds

What is the difference between organic and inorganic chemistry? * Organic chemistry studies compounds with metals; inorganic does not Organic chemistry studies carbon compounds; inorganic does not Inorganic chemistry studies living things; organic does not They are both the same

Write in paragraph form. In responding to your classmate's post about mercaptan, it's clear that while mercaptan is crucial for detecting natural gas leaks due to its distinctive odor, it also presents certain hazards, such as flammability and potential irritation to skin and eyes. Your classmate mentions a spill incident, which highlights the

An atom that has 7 valence electron will form an ion with a charge of (enter answer below). Remember to put your sign (+ or -) and number

What is the substance that can be the final electron acceptor besides oxygen? Nitrogen Helium Chlorine Carbon

_____________ is a common sacrificial anode and is often used in cooling water systems that contain seawater. Group of answer choices copper tin brass zinc

What is the name of the 2nd reaction you will be doing in lab? (i.e., the one after the Diels-Alder reaction). Question 8 options: esterification hydrogenation hydrolysis hydrohalogenation

Which of the following smoke detectors is the most sensitive? Option A Ionization Option B photoelectric Option C air sampler Option D fusible alloy

A compound can be built with Kit #3. Build it and view the solid sphere (aka space-filling) and ball and stick models by clicking the green "3D" toggle. 1. What is the name of the compound? Formaldehyde 2. What elements make up the compound? 1 Cabron atom, 2hbydrogen atom , 1 oxygen atom 3. Draw the solid sphere (aka space filling) model, ball &

4P (s) + 5O2 (g) 2P2O5 (s) a. Determine the limiting reactant when a chemist reacts 15.0 g of P with 15.0 g of O2

FAD, NAD, and coenzyme A are all _________blank carriers. Multiple Choice hydrogen electron ATP hydrogen and electron None of the choices are correct

NaHCO3 Mass used were reaction 1 0.10, reaction 2, 0.20, reaction 3, 0.35, and reaction 4, 0.50

Calculate the volume of carbon dioxide gas produced if 100.0 grams of glucose reacts CH1206(s) - 2 CHsOH (1) + 2 CO,(g) 0:49 Mass A 1 mole Molar mass Mass B (grams) molar mass(B) Moles B 1 mole (grams) Particles A 1 mole 6.02E23 Particles B (atoms, molecules, formula units] 6.02E23 1 mole atoms, molecules, formula units Moles A Volume A 1 mole

How many half-lives have passed if a rock contains 25% parent isotopes and 75% daughter isotopes? Group of answer choices 3 4 1 2

3. To compare Great Things with Small.The not so much fun Uncle Miltie. (16 pts) oscillator models. All parts of this problem refer to a REAL diatomic molecule, not the rigid rotor or harmonic a.) Which is larger, the energy of the J10 transition when = 0 or when = 10. Explain. b.) Which is larger, twice the energy spacing between the J = 0 and J

What are complex ions made of? Monatomic ions and a Lewis dot structure A metal ion and ligands Neutral molecules and electrons A valance electron and polyatomic ion

Which of the following occurs in the process of amino acid metabolism? The nitrogen-containing amino group is removed and excreted as urea. The acidic carboxyl group is removed and excreted as uric acid. The acidic carboxyl group is removed and converted to ammonia. The nitrogen-containing amino group is removed and stored as ammonia

Zinc Fluoride is written as Question 1Select one: a. ZnF b. ZnF2 c. Zn2F d. Zn2F4

A 400-liter CSTR and a 100-liter PFR are available to process 1.0 liter of feed per second. The feed contains 41% A, 41% B, and 18% inerts. The irreversible gas-phase reaction A + B !C is to be carried out at 10 atm and 227C. The rate of reaction (mol/liter-min) is given below as a function of conversion

what is the smallest concentration of H3O+ ions you can expect to observe in any solution of HCl in water no matter how dilute? defend your

In sterile compounding, if you do not follow aseptic technique and the final product is not sterile, this is an example of what kind of error? Question 23 options: 1) documentation error 2) adverse drug error 3) contaminated product error 4) omission error

Defining temperature through m is meaningful because in equilibrium, the latter quantity is the same for all particles throughout the sample, regardless of chemical identity. Group of answer choices True False

Lipids that are synthesized by the body include Blank______. Multiple select question. cholesterol triglycerides omega-3 fatty acids phospholipids

Select the one incorrect statement in the first step of a Proton-Proton thermonuclear chain reaction. a. Two protons are hydrogen ions will collide to form a deuterium ion. b. A deuterium ion contains only one proton and one neutron in its nucleus. c. One neutrino is a by-product of the step 1 reaction. d. One positron is a by-product of the step

he two data sets to the right are conversion as a function of time in a reactor at a low pressure (XL data) and at a higher pressure (XH data). All the other conditions (temperature, inlet concentrations, etc.) are the same. The data were collected to make a comparison of the effect of pressure. Without doing the actual calculations, describe the

Consider the phase change CO2 (s) CO2 (g). This phase change will be spontaneous at which of the following temperatures? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Both high and low temperatures b Neither high nor low temperatures c Only high temperatures d Only low temperatures

What makes hydrocarbons diverse despite being composed of only carbon and hydrogen? A. They can form multiple bonds with oxygen. B. They are always saturated. C. They can form a wide variety of structures, such as chains, branched chains, and rings. D. They only exist as chains of carbon atoms

What distinguishes a dye from a pigment? Group of answer choices There's no real difference. Dyes are mineral based while pigments are organic compounds. Dyes are organic compounds while pigments are mineral based. No answer text provided

1000.0 cm3 of a metallic cylinder has a mass of 556 gram. Calculate the density of the cylinder. Group of answer choices 1000.0 gm/cm3 .556 gm/cm3 55.6 gm/cm3 5,56 gm/cm3 No answer text provided

what structure would follow the NMR data Give the structure that corresponds to the following molecular formula and ' H NMR spectrum: Macmillan Lear CAH10 O, : 8 1.36 (3H, d, J = 5.5 Hz); 8 3.32 (6H, s); 8 4.63 (1H, q, J = 5.5 Hz) Draw the structure. Select Draw Templates More C H O

Which of the following is always true? Question 1 options: Processes that involve an increase in entropy of the system are spontaneous The change in entropy of the universe is the same as the change in entropy of the surroundings Spontaneous changes cause an increase in the entropy of the universe Heat will flow from a cooler object to a hotter

I APA student paper title pages always include which of the following information? (Select all that apply) Paper title Assignment completion date Abstract Page number 1 at the top right corner Author name Page number 1 at the bottom left corner Author affiliation Course number and name Assignment due date Instructor name

nhma ny bn kiu l u c dc 5% u dko ti v n nm trong mixture ca nacl and kcl m????? nhma hiu ko l mnh tnh %cl th lm sao chia m aquilot hay chia m sample lun

What chemical property causes the color of the media to change when performing a fermentation test? temperature presence of microbe pH triglycerides

A What two products are made upon reaction of the following alkene with bromine? Br2 CH2 Cl2 Identify the two major enantiomeric products from the following reaction: Select 2 correct answer(s) B H3C Br + H2 Pd/C Br CH(CH3)2 Select 2 correct answer(s) O CH3 OH H- Br H Br CH(CH3)2 O O CH3 .Br Br -H O CH(CH3)2 OH3 C Br ""/CH(CH3)2 O Br H Identify

Is the reaction in Q5 spontaneous under standard conditions (i.e. when the concentrations of all reactants and products is equal to 1.00 M)? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Yes b No c It's at equilibrium

What does the value of Q = 0.0329 compared to K = 0.113 suggest about the direction of the net reaction? Q > K, so the reverse reaction is favored. No direction is favored. Q

Classify the following molecule as polar, nonpolar, ionic, or metallic: CH2O (carbon is the central atom)

Which one of the following elements is the most important alloying ingredient in steel: Option A carbon Option B chromium Option C nickel Option D molybdenum Option E vanadium

what the physical or chemical P 1. Table Salt dissolves in water. 9. Milk sours. C 2. Ag (Silver) tarnishes. 10. Sugar dissolves in water. + P 3. An apple is cut. 11. Wood rots. 4. Heat changes H,O to steam. 12. Pancakes cook. 5. Baking soda reacts to vineger. 13. Grass grows. 6. Fe (Iron) rusts. 14. A tire is inflated. 7. Alcohol evaporates 15.

23. Lomitapide (Juxtapid) Approved for homozygous familial hypercholesterolemia Lower LDL, total cholesterol, apolipoprotein B, non-HDL TG transfer protein inhibitor: binds and inhibits microsomal TG transfer protein (MTP) prevent apo B assembly inhibits chylomicrons and VLDL synthesis VLDL synthesis inhibition reduces LDL

is this correct? Instruction I. Record following transactions as we did in class (Asset - Liability + Equity) 1. AA received cash $200,000 by issuing additional common stock 2. Received cash from room sales of $10,000 (i.e., earnings increased) 3. Sold rooms on account (i.e., accounts receivable), $1,00( 4. Purchased van by cash, $30,000 5.

which is noBoth metabolic acidosis and metabolic alkalosis willt an expected outcome of cirrhosis

8) Provide the structure of the major product of the reaction below or write "no reaction" if you think so. O CI AICl3 9) Provide the major product(s) of the following reaction and the corresponding mechanism. HNO 3 H2SO4

The pH of a neutral substance is Blank______. Multiple choice question. 14 7 0

t 25C the rate constant for the first-order decomposition of a pesticide solution is 6.40 10-3 min-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25C

The primary utilities that need to be considered when evaluating a site are Group of answer choices water gas electric cable/satelite a, b, c, & d a, b, & c only

Presentation on clinical biochemistry and haematology 1-Background () 2-Study Objective and Context () 3-Methodology () 4-Results () 5-Discussion and Critical Evaluation () 6-Potential Improvements and Alternative Approaches ( ) 7-Conclusion () This is the article Minimally early morbidity in children with acute myeloid leukemia and

Absorbing acetone from air using water (Work in mole ratio units) Acetone is being absorbed from air using water as the solvent. Operation is at 1 atm and is isothermal at 20 C. The total flow rate of entering gas is 100 kmoles/hr. The entering gas is 12 mole % acetone. Pure water is used as solvent. The water flow rate is 150 kmoles/hr. We desire

In each of the following, identify which names are incorrect for the given formulas by giving the correct name. If correct, type "correct" in the response field. Flag question: Question 13 Question 131 pts CaH2, calcium hydride

Briefly respond Evaluating an aspect of the post. For instance, did they adequately explain the solubility based on intermolecular attractions? Was anything missing from their explanation?Look at one of the other uses of ethylene glycol they indicated. Explain why this use is possible, based on the chemical properties: Ethylene glycol is a

The DNA code for the amino acid sequence of this unknown enzyme is leucine alanine lysine tyrosine

Methane (CH4, 16.05 g/mol) reacts with oxygen to form carbon dioxide (CO2, 44.01 g/mol) and water (H2O, 18.02 g/mol). Assume that you design a system for converting methane to carbon dioxide and water. To test the efficiency of the system in the laboratory, you burn 5.00 g methane. The actual yield is 6.10 g water. What is your percent yield? %

Prothrombin is ______. Multiple choice question. an inactive glycoprotein a monomer of fibrinogen an active enzyme

When a solution is saturated, more solute may dissolve if you: Select the correct answer below: change the temperature stir the solution continue to add solute crush or grind the solute into a fine powder

Identify the Bronsted-Lowry base: the numbers are subscripts. Group of answer choices KOH BF3 KCl Her

I A nurse is teaching a group of caregivers regarding the signs and symptoms of a child who may be experiencing bullying. Which of the following statements by the caregiver demonstrates an understanding of the teaching? "Children who are victims of bullying usually display high levels of confidence and good social skills." "Children who are
I A nurse is teaching a group of caregivers

what's fluorite used for? A, watches. B, toothpaste. C, pharmaceuticals. D, Construction Material

Is the reaction of nitrogen gas and hydrogen gas to give ammonia a redox reaction? N_2 (g) + 3 H_2 (g) 2 NH_3 (g) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Yes, it is a redox reaction. In this reaction, nitrogen is oxidized and hydrogen is reduced. b Yes, it is a redox reaction. In this

Simple carbohydrates, also referred to as sugars, include monosaccharides and disaccharides. Monosaccharides consist of a single sugar molecule, and disaccharides consist of two molecules of sugar joined together. Complex carbohydrates are larger molecules with many sugar molecules. Choose the correct statement about simple or complex

fill it in NAME DATE CLASS Reading Essentials and Study Guide networks Chapter 1 Foundations of Government Lesson 3 The Role of Government in Economic Systems ESSENTIAL QUESTION What is the role of government in different types of economic systems? Reading HELPDESK Academic Vocabulary regulation rule or procedure that has the force of law
fill it in NAME DATE CLASS Reading Essentials and

ss U Question 6 2 pts It is best practice to implement as much buffer memory as possible. True False
ss U Question 6 2 pts It is best practice to

If 300 mL of a 3% solution is being prepared from a 25% solution, ____mL of the 25% solution will be used

Fill in the Blank 2 points Question at position 5 Consider the UNBALANCED redox reaction: H2O2 (aq) + Fe2+ (aq) Fe3+ (aq) + H2O (l) Part A: Balance the half-reactions (acidic solution). Hint: The coefficients are only for each half-reaction balanced individually before they are combined. Enter each coefficient as a whole number. Balance charge

Jolie is struggling with chemistry. She considers herself a strong student in the sciences, but currently has a low grade in the class. She has always wanted to be a doctor, but now she's starting to wonder if she's really cut out for medicine. All of the classes have been harder than she anticipated. If she wants to adopt a growth mindset, what

The internuclear distances in gas-phase ionic molecules are considerably smaller than those in the corresponding crystals. For example, the internuclear distance in NaCl(g) is 2.3606 , whereas in NaCl(s) the shortest Na-Cl distance is 2.814 . Explain why this should be so when the binding energy is larger in the crystal

prelab for experiment 7 SYNTHESIS OF FRUITY ESTERS USING THE FISCHER ESTERIFICATION REACTION isoamyl alcohol with propionate sulfonic acid and product isoamyl propionate

Hello, Answer this question, no need to show your work! Please make sure the answer is correct. Thank you! Question 5 1 pts Which of the following would NOT be present in the product mixture of the following reaction? NaOH ighted Grimery O OH O H H (A) ork (B) (C) (D) O A O B OC OD

Using the following information: donut (weighs 42 grams, 175 kcal) or bagel (weighs 94 grams, 210 kcal), which statement is NOT true? Question 24 options: bagel is considered more energy dense than the donut. bagel has energy density of 2.2 kcal/gram. donut is more energy dense than the bagel. donut has energy density of 4.2 kcal/gram

19 (3 points) Hydrogen peroxide decomposes to water and oxygen according to the reaction below: 2 H202(aq) - 2 H20(1) + 02(8) In the presence of large excesses of I" ion, the following set of data is obtained. What is the average rate of disappearance of H202(aq) in M/s in the first 45.0 seconds of the reaction if 1.00 L of H202 reacts at 25C and

describe how you would determine the pH of a solution given the hydronium ion concentration ([H 3 O + ]) and how you would determine the hydronium ion concentration ([H 3 O + ]) given the pH on your specific calculator. Be sure to state which equations you use and the steps on your calculator required. Responses should include a unique example of

A Identify the two major enantiomeric products from the following reaction: CH2 Cl2 Select 2 correct answer(s) O 0 o O O O A What is the major product from the following reaction? B 1)03, -780 2) Zn, CH3CO2H O O O O O O O O O O O

What is the Molecule Geometry of a ABE3 molecule? Question 28 options: trigonal bipyramidal tetrahedral trigonal planar linear

Identify the hydronium ion. Multiple choice question. H2O H+ H3O+ H2O+

b Set the burner stand towards the back of the pie plate. c Place the beaker on the center of the stand. Data Experiment 1 Data Table 1 E) Data Table 2 Data Table 3 Exercise 1 . Data Table 2: Temperature Measurements Water Temperature ('C) Temperature ("F) Temperature (1) Hot from tap Boiling Boiling for 5 minutes Cold from tap Ice water - minute

correctly Multiple Choice 20 points The Assyrian Empire, centered in Nineveh (c. 1200 B.C.), developed a court system for dealing with theft and murder, requiring police activity. O No answer text provided. True No answer text provided. O False Multiple Choice 20 points Police can obtain a search warrant without probable cause. O True No answer

Can you answer with clarification, please? Do your best!! Remember to read the directions carefully and answer all parts. la) Draw all the resonance structures for the compound above. Label all lone pairs and formal charges! 1b) Identify the major resonance form. Justify your answer. 2) Below is a drug called Lisinopril used to treat high blood

AISI 4340 steel is Option A Ni-Cr-Mo steel with about 0.4% carbon content Option B Nickel steel with about 0.4% carbon content Option C Nickel steel with about 0.04% carbon content Option D Plain carbon steel with about 0.4% carbon content

I'm familiar that the correct order is IV - II - III - I - V but I don't know why or don't know how to relate this to thermodynamics and biochemical reactions. I saw stuff that said oxidation is related, hence when a molecule has more hydrogen atoms it makes it's been reduced so it has more energy which makes sense. and that if it has more oxygen

ions are produced from a loss or gain of Blank______. Multiple choice question. neutrons electrons protons

1 g:15 mL expressed as a fraction is ___ g/100 mL. Please round to the nearest hundredth

In which scenario would entropy most likely decrease? A gas condenses into a liquid. Ice melts into liquid water. A compound decomposes into gases. A solid dissolves in water

Thermochemistry is a vital branch of physical chemistry that provides a fundamental understanding of energy exchange during chemical reactions. The study of thermochemistry has numerous practical applications in various fields, including energy production, medicine, and environmental science. By understanding the principles of thermochemistry,

What is the predicted integration pattern for 1-bromobutane? Score: 318/600 Question Value: 35 a What is the predicted integration pattern for 1-bromobutane? () two signals in a 6:3 ratio C) three signals in a 2:4:3 ratio Adaptive Quiz: Nuclear Magnetic Resonance Spectroscopy () four signals in a 3:5:6:3 ratio C) four signals in a 2:2:2:3 ratio

explain step by step What is the product formed from the intramolecular cyclization of the structure in the left (sorbose) . (Circle your answer. 2 points) Aldetore HO OOH OH OH HO OH OH CH2OH CH2OH OH I O O OH HO CHZOH I OH OH OH OH

Write a balanced chemical reaction for the formation of the following complex ions: (a) PbI3- (b) PbI4 2

I need help with this worksheet! 1. Add 'diene" and "dienophile" labels to the starting materials and predict the products of the following [4+2] cycloaddition reactions. Ignore stereochemistry, but follow the "major" and "minor" labels in the boxes to indicate which regioisomer is favored (hint: consider resonance effects of the substituents) Ph

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