Chemistry concepts and calculations

14 The concentration of urea (Mw-600 g/mol] in a solution prepared by dissolving

14 The concentration of urea (Mw-600 g/mol] in a solution prepared by dissolving 16 g of urea in 39 A) 96 8) 68 C) 0.68 0163 0.11 15. The rate law for a reaction is Which one of t…

14 The followeing four gas samples were all held at 1.00 atm of pressure: A nitr

14 The followeing four gas samples were all held at 1.00 atm of pressure: A nitrogen gas sample at -100°ca trege gas sample at .100 ee an argon gas sample at-100 and an argon gas …

14 The following figures refer to the concentration of albumin, in gl1, in the b

14 The following figures refer to the concentration of albumin, in gl1, in the blood sera of 16 healthy adults: 37, 39, 37, 42, 39, 45, 42, 39, 44, 40, 39, 45, 47, 47, 43, 41 (Foo…

14 Useful constant: K of water at 25 \"C- 1.00 10 L. Data Handling Analysis of t

14 Useful constant: K of water at 25 "C- 1.00 10 L. Data Handling Analysis of the mass percentage of Cl in a given sample gave the following results: 0.582,0.619,0.621 Answer the …

14 Write the equilibrium constant for the equilibrium reaction of nitrogen with

14 Write the equilibrium constant for the equilibrium reaction of nitrogen with hydrogen. Nitrogen and hydrogen combine to form ammonia. If the concentration of Hydrogen is 9.2x10…

14 of 15 ic Table of the Part A a1.15 % (mv) H2SO4 solution prepared from 10 9 m

14 of 15 ic Table of the Part A a1.15 % (mv) H2SO4 solution prepared from 10 9 mL of a 19 4 % H2SO, solution Express your answer to three significant figures and include the appro…

14 please Copper has an atomic weight of 63.55 u. If 69.17% of Cu exists as Cu-6

14 please Copper has an atomic weight of 63.55 u. If 69.17% of Cu exists as Cu-63 (62 93960 u). what is the identity and the atomic mass of the other isotope? Cu-64, 63.82 u Cu-64…

14) 14) The balanced molecular equation for complete neutralization of H2sOg by

14) 14) The balanced molecular equation for complete neutralization of H2sOg by KOH in aqueous solution is D) 2H+ (aq) * 20H-(aq) 2H2O (0 15) 15) Which of the following is an oxid…

14) As a pare element the oxidation number of zine is number is but in compounds

14) As a pare element the oxidation number of zine is number is but in compounds such as ZnCOs its oxidation A) 0:0 B)0;+1 O+1:0 D)0; +2 E) none of the above 15) 2 AgNO3 (aq) + K2…

14) Calculate the entropy change for the following reaction given the data below

14) Calculate the entropy change for the following reaction given the data below N2 + 3 H2 --><-- 2 NH3 SoNH3 = 29.2 J/K,    SoH2= 1.2 J/K,     SoN2 = 4.6 J/K 15) For a unkn…

14) Here are the measured hydrogen and helium masses: 1H(aka hydrogen): m1H=1.00

14) Here are the measured hydrogen and helium masses: 1H(aka hydrogen): m1H=1.007825u=mp+me (recall that standard hydrogen has no neutrons) 2H(aka deuterium): m2H=2.014102u 3H(aka…

14) Ka for HCN is 4.9 x 10^-10. What is the pH of a 0.068 M aqueous solution of

14) Ka for HCN is 4.9 x 10^-10. What is the pH of a 0.068 M aqueous solution of sodium cyanide? A) 2.96 8) 7.00 C) 11.07 D) 13.24 E) 0.74 15) What is the molar solubility of bariu…

14) We define pH as pH = -log [H + ]; therefore, [H + ] = antilog (-pH). Also, w

14) We define pH as pH = -log [H+]; therefore, [H+] = antilog (-pH). Also, we know that [H+]*[OH-] = Kw = 1.0*10-14 where Kw is the ionic product of water. Use the two relations a…

14) Which of the following alkenes has the largest molar heat of hydrogenation (

14) Which of the following alkenes has the largest molar heat of hydrogenation (ie, releases the most heat upon hydrogenation)? A) 2,3-dimethyl-2-butene B) 2-methyl-2-butene C) tr…

14) Which of the following is often true of the active site of an enzyme? Questi

14) Which of the following is often true of the active site of an enzyme? Question 14 options: it consists of amino acids which are adjacent to each other (residue number) none of…

14) You would expect reaction 6 would likely involve what cofactor? a) Biotin b)

14) You would expect reaction 6 would likely involve what cofactor? a) Biotin b) Thiamine Pyrophosphate c) Pyridoxal Phosphate d) Lipoic Acid 15) A reaction mechanism similar to t…

14) he que Name MULTIPLE CHOICE. Choose the one alternative that best completes

14) he que Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the questio 1) Light passing through a transparent medium has a wavelength…

14). A physician orders 2 g of an antibiotic to be placed in 1000 mL of D5W. Usi

14). A physician orders 2 g of an antibiotic to be placed in 1000 mL of D5W. Using an injection that contain 300 mg of the antibiotic per 2 mL, how many milliliters should be adde…

14, pts) or the Fe Fe,c phase diagram, as seen below, answer the questions: 2,80

14, pts) or the Fe Fe,c phase diagram, as seen below, answer the questions: 2,800 B 1,538 Liquid NYH Solidus L 1,148 2,098 1,674 G 912 a 1,341 Pearlie FeaC Q a pearlite Pearline H…

14- What happens to the solubility of carbon dioxide gas (CO2) in water in each

14- What happens to the solubility of carbon dioxide gas (CO2) in water in each situation? (Answer increase, decrease, or no change.) a. The pressure of CO2 over the solution is i…

14- Write \"True\" or \"False\" at the beginning of each of the following statem

14- Write "True" or "False" at the beginning of each of the following statements: a) Alcohols are more polar than alkanes, but less polar than thiols False b) Alcohols are flammab…

14-1 Review and Reinforcement Condensed States of Matter Fill in the tollowing c

14-1 Review and Reinforcement Condensed States of Matter Fill in the tollowing chart comparing solilds and liquids Physical Property Liquids Solids 2. Density Shape 3. 4. Rate of …

14-17C In the fully +17( the velocity profile change in the flow direction? ly d

14-17C In the fully +17( the velocity profile change in the flow direction? ly developed region of flow in a circular14-30 Water at 10C (p 9 10-3 kgins) is flowing ste pps does th…

14-23 I have already done the questions, idk if they are all right though. so If

14-23 I have already done the questions, idk if they are all right though. so If someone could just see if there are any wrong answers and just write the correct m.c. with the que…

14-23 I have already done the questions, idk if they are all right though. so If

14-23 I have already done the questions, idk if they are all right though. so If someone could just see if there are any wrong answers and just write the correct m.c. with the que…

14-7. Butadiene can be formed by dehydrogenation of n-butane: This reaction is c

14-7. Butadiene can be formed by dehydrogenation of n-butane: This reaction is carried out in the gas phase. A. Calculate the equilibrium constant of this reac- tion at K298 15 B.…

14-With respect to the clinical significance of ketogenesis, which of the statem

14-With respect to the clinical significance of ketogenesis, which of the statements below are FALSE? a) The Ketone bodies are relatively strong acids b) The increase of ketone bo…

14. (12 marks) Let G (V, E) be an undirected graph in which every vertex is labe

14. (12 marks) Let G (V, E) be an undirected graph in which every vertex is label either "free" or "toll". Write an algorithm that given two "free vertices s and t it decides whet…

14. (12 points total) The following reaction is used in some labs to produce gre

14. (12 points total) The following reaction is used in some labs to produce greenhouse gas: CaCO3(s) + 2HCl(aq) ? CaCl2(aq) + H2O(l) + CO2(g) a) (6 pts) In an experiment 25.0 mL …

14. (12 points total) The following reaction is used in some labs to produce gre

14. (12 points total) The following reaction is used in some labs to produce greenhouse gas: CaCO3(s) + 2HCl(aq) ? CaCl2(aq) + H2O(l) + CO2(g) a) (6 pts) In an experiment 25.0 mL …

14. (12 points total) The following reaction is used in some labs to produce gre

14. (12 points total) The following reaction is used in some labs to produce greenhouse gas: CaCO3(s) + 2HCl(aq) ? CaCl2(aq) + H2O(l) + CO2(g) a) (6 pts) In an experiment 25.0 mL …

14. (12 points total) The following reaction is used in some labs to produce gre

14. (12 points total) The following reaction is used in some labs to produce greenhouse gas: CaCO3(s) + 2HCl(aq) ? CaCl2(aq) + H2O(l) + CO2(g) a) (6 pts) In an experiment 25.0 mL …

14. (14 points) Choose from these hydrogen orbitals (or subshells) to fill in th

14. (14 points) Choose from these hydrogen orbitals (or subshells) to fill in the blanks below. 3p 4p 2 7 6d The orbital with: the lowest energy An orbital with /-1and n-3 An orbi…

14. (2 pts) What cations are formed in the mass spectrometer by a cleavage of th

14. (2 pts) What cations are formed in the mass spectrometer by a cleavage of the compound below. (circle ALL that apply) ?? A. 124 B. 127 ?. 142 D. 45 E. 83 F. none of the above …

14. (a) How many milliliters of 0.155 M HCl are needed to neutralize completely

14. (a) How many milliliters of 0.155 M HCl are needed to neutralize completely 45.0 mL of 0.101 M Ba(OH)2 solution? ml (b) How many milliliters of 3.50 M H2SO4 are needed to neut…

14. (a) Viewers of Star Trek hear of an antimatter drive on the Starship Enterpr

14. (a) Viewers of Star Trek hear of an antimatter drive on the Starship Enterprise. One possibility for such a futuristic energy source is to store antimatter charged particles i…

14. 0 points) For the following, consider Mg(OH 2(s) dissolved in 1.00 M NH4Cl(a

14. 0 points) For the following, consider Mg(OH 2(s) dissolved in 1.00 M NH4Cl(aq). Mg(OH)20s) 2+ (aq) 2 OH-(aq) Ksp 1.8 X 10-11 Mg NH3(aq) H2O() NH 4+ (aq) OH (aq) 1.8 X 10 a. Wh…

14. 1.Solve all a) Classify each of these compounds as an Arrhenius acid, an Arr

14. 1.Solve all a) Classify each of these compounds as an Arrhenius acid, an Arrhenius base, or neither. Drag each item to the appropriate bin. Help Reset b)The oxyacids containin…

14. 14. Which of these statements correctly describes the use of formal charge i

14. 14. Which of these statements correctly describes the use of formal charge in choosing between possible Lewis structures to describe a molecule? I. Formal charge on all the at…

14. A beaker contains 100 ml. of salt water. If 100 mL of distilled water is add

14. A beaker contains 100 ml. of salt water. If 100 mL of distilled water is added to the beaker,the ml of distil number of moles of NaCI (a), increase by 50% (b), decreases by 50…

14. A carbon tetrachloride (CCl4) molecule is nonpolar while water (H2O) is pola

14. A carbon tetrachloride (CCl4) molecule is nonpolar while water (H2O) is polar, according to this information: Carbon tetrachloride has a higher melting point and boiling point…

14. A flow in which each liquid particle does not have a definite path and the a

14. A flow in which each liquid particle does not have a definite path and the aths of individual particles also cross each other, is called turbulent flow. a. TRUE b.FALSE e volu…

14. A flow in which each liquid particle does not have a definite path and the a

14. A flow in which each liquid particle does not have a definite path and the aths of individual particles also cross each other, is called turbulent flow. a. TRUE b.FALSE e volu…

14. A gas sample contains 40g of CH4 and 2.0 g of He. What is the volume of the

14. A gas sample contains 40g of CH4 and 2.0 g of He. What is the volume of the sample at STP A) 130 L ) 11 L C) 17L D) 30. L E) 5.6L 15. What is the mass of a somple of 02 gas, w…

14. Adenine (space-filling model shown below) is a nucleobase molecule whose der

14. Adenine (space-filling model shown below) is a nucleobase molecule whose derivatives are useful in biological processes such as cellular respiration. It is a compound that con…

14. All the following are reasons why back titration is carried out for some rea

14. All the following are reasons why back titration is carried out for some reagents except a. Volatility b. Some of the reagent react two fast c. Insoluble salts d. Some reagent…

14. An organic student Naph T. Ene attempted to Convert tert-butanol (8) into te

14. An organic student Naph T. Ene attempted to Convert tert-butanol (8) into tert-butyl chloride (9). Unfortunately GC, as shown below, indicated the reaction Was incomplele. How…

14. Answer the following (True or False problem) a) For metals, empty states are

14. Answer the following (True or False problem) a) For metals, empty states are always available right above the filled electron states: True or False? For n-type semiconductors,…

14. Answer the following (True or False problem) a) For metals, empty states are

14. Answer the following (True or False problem) a) For metals, empty states are always available right above the filled electron states: True or False? For n-type semiconductors,…

14. Answer the following problems with explanation. The specific rotation [a of

14. Answer the following problems with explanation. The specific rotation [a of natural epinephrine (adrenaline) in water is-50°. Assume that all measurements are made in 10 cm po…