Chemistry concepts and calculations
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16) Elements in the modern version of the periodic table are arranged in order o
16) Elements in the modern version of the periodic table are arranged in order of increasing A) oxidation number D) average atomic mass C) number of isotopes B) atomic mass E) ato…
16) For each of the three balls in the previous problem, calculate the square-ro
16) For each of the three balls in the previous problem, calculate the square-root of the ratio of its final height after the bounce to its initial height before the bounce. [Ente…
16) Given the following reactions Fe2O3 (s) + 3CO (s) 2Fe(s) + 3CO2 (g) AH--28.O
16) Given the following reactions Fe2O3 (s) + 3CO (s) 2Fe(s) + 3CO2 (g) AH--28.Okj 3Fe (s) + 4CO2 (s) 4CO (g) + Fe304 (s) AH-+12.5 kJ the enthalpy of the reaction of Fe203 with CO…
16) Indicate the type of particles that are located at the lattice points and th
16) Indicate the type of particles that are located at the lattice points and the types of attractive forces that exist between the particles. Then tell what type of crystalline s…
16) John is still thinking, and even better, because he is starting to cool off.
16) John is still thinking, and even better, because he is starting to cool off. He is still contemplating the liquid and solid states in his glass. Why doesn't the water just fly…
16) Jupiter has a mass roughly 320 times higher that of the earth. Me-5.98 X 102
16) Jupiter has a mass roughly 320 times higher that of the earth. Me-5.98 X 1024 kg) and a radius equal to 11 times that of the earth [RE = 6.4 X 100 ml what is the acceleration …
16) Melting point can be defined as the temperature when a solild becomes a liqu
16) Melting point can be defined as the temperature when a solild becomes a liquid. The of the chemical acetone is-95 C. Which state of matter wou temperature of-94'C? ld you expe…
16) Precursors for the biosynthesis of the pyrimidine ring system include: a) ca
16) Precursors for the biosynthesis of the pyrimidine ring system include: a) carbamoyl phosphate and aspartate. b) glutamate, NH3, and CO2. c) glycine and succinyl-CoA. d) glycin…
16) The correct order of atomic radii is given by, K > Ca > Ge > As > Kr Because
16) The correct order of atomic radii is given by, K > Ca > Ge > As > Kr Because all the elements are present in the same period and their atomic number increses. The …
16) The data below were determined for the reaction shown below. Expt.B [S:01 0.
16) The data below were determined for the reaction shown below. Expt.B [S:01 0.038 0.076 0.076 11-1 0.060 0.060 0.030 14 10M/s 2.8 x 10 Ms 1.4×10-sMis The rate law for this react…
16) What are the two types of current? What is different about the flow of elect
16) What are the two types of current? What is different about the flow of electrons? (think of our class demonstration) 17) What phenomena is responsible for how generators and m…
16) What is the solubility of sodium carbonate (in g/100ml) at 0.0°c? (Use therm
16) What is the solubility of sodium carbonate (in g/100ml) at 0.0°c? (Use thermo info on the last p (Hint: ICE table] a. 0.234 g/100ml b. 7.77 g/100ml c. 24.23g/100ml d. 1.12x10t…
16) Which acid is stronger between the acids noted in two previous problems? The
16) Which acid is stronger between the acids noted in two previous problems? The Ka of H3PO4 is 7.1x 103 while for ILs it is 7.1x 17) Which of these is a strong acid. H2So or HF? …
16) Which carbonyl is more susceptible to nucdeophilic addition, that of cyclohe
16) Which carbonyl is more susceptible to nucdeophilic addition, that of cyclohexanone or 16) that of hexanal? Provide two reasons for your choice. MULTIPLE CHOICE Choose the one …
16) Which one of the following is NOT an example of inductive effects on chemica
16) Which one of the following is NOT an example of inductive effects on chemical structure or reactivity? A) Brønsted acid strength: HCl > HF B) Car…
16) Zn(s) +2 HCI(aq) H2(g) + ZnCl2(aq) 16 When 25.0 g of Zn reacts, how many L o
16) Zn(s) +2 HCI(aq) H2(g) + ZnCl2(aq) 16 When 25.0 g of Zn reacts, how many L of H2 gas are s, how many L of H2 gas are formed at 25 'C and a pressure of 854 mmg? B) 8.56 L A) 0.…
16) write the net ionic equation for hte followingreaction BaBr2(aq)+Na2 So4 (aq
16) write the net ionic equation for hte followingreaction BaBr2(aq)+Na2 So4 (aq)------------------? 17) write the half reactions for the following redax reaction2Li + H2 --------…
16, When acetone and chloroform are mixed, hydrogen bond is formed between the O
16, When acetone and chloroform are mixed, hydrogen bond is formed between the O in acetone and the H in chloroform. This will result in a(maximum or minimum) boiling azeotrope. B…
16,500 pts left on my chegg account and my account expires March 9th. I can give
16,500 pts left on my chegg account and my account expires March 9th. I can give you the rest of my points for this problem- through multiple questions that I'll choose you for :)…
16-1. Please show all work! Calculate the minimum safe distance you can be from
16-1. Please show all work! Calculate the minimum safe distance you can be from a speaker that puts out 2.00 W of sound, using the following assumptions: The sound power spreads u…
16-20 work not necessary The K_sp of CaCO_3 is 2.8 times 10^-9 in pure water. Wh
16-20 work not necessary The K_sp of CaCO_3 is 2.8 times 10^-9 in pure water. What is the molar solubility for CaCO_3? A) 6.8 times 10^-4 M B) 5.3 times 10^-4 M C) 3.0 times 10^14…
16. (Ipt ea) Matching: Use the following terms to match to the descriptions. You
16. (Ipt ea) Matching: Use the following terms to match to the descriptions. You may use a term more than once if needed (but only one per blank). Terms: a. Has no mass and no cha…
16. A certain gas, XY(&), decomposes as represented by the equation above. A sam
16. A certain gas, XY(&), decomposes as represented by the equation above. A sample of each of the three gases is put in a previously evacuated container. The initial partial …
16. A chemical reaction occurs spontaneously when __________ A) energy is releas
16. A chemical reaction occurs spontaneously when __________ A) energy is released. B) energy is absorbed. C) the volume increases and work is done. D) more states of the reactant…
16. A reaction at equilibrium has a Keq value of 1.5 x 103. Which statement best
16. A reaction at equilibrium has a Keq value of 1.5 x 103. Which statement best describes what is occurring in the system (3pts) The reaction has barely started before the revers…
16. A solution may contain the following ions Ag+, Cu2+, Mn2+, Ca2+, and Na+. No
16. A solution may contain the following ions Ag+, Cu2+, Mn2+, Ca2+, and Na+. No precipitate formed when 0.10 M HCl was added but a dark colored precipitate formed when H2S was ad…
16. Ammonia is a weak tvase and perchloric ncid is a strong acid. Which statemen
16. Ammonia is a weak tvase and perchloric ncid is a strong acid. Which statement t is true of a solution of ammoniun perchlorate? a. It is strongly acidic. b. Ie is weakly acidie…
16. Analytical chem question on sapling correct answers will get rated! thanks T
16. Analytical chem question on sapling correct answers will get rated! thanks The partition coefficient, K, for compound A between toluene and water is 6.95. What is the concentr…
16. At a given temperature and pressure,a sampleofGas A is observed to diffuserw
16. At a given temperature and pressure,a sampleofGas A is observed to diffuserwice as fast as a sample of a different gas, B. Based on this: A) The molar mass of A is 0.707times …
16. BASED SOLELY ON ITS POSITION IN THE PERIODIC TABLE , PREDICT AND EXPLAIN HOW
16. BASED SOLELY ON ITS POSITION IN THE PERIODIC TABLE , PREDICT AND EXPLAIN HOW MANY 4D ELECTRONS ARE FOUND IN Z = 47? 17. PREDICT AND EXPLAIN WHICH ATOM WOULD HAVE THE HIGHER SE…
16. Calculate the number of moles of KOH in 7.60 mL of a 0.260 M KOH solution. _
16. Calculate the number of moles of KOH in 7.60 mL of a 0.260 M KOH solution. _____mol What is the pOH of the solution at 25°C? Enter your answer in the provided box. The pOH of …
16. Calculation of pH from Molar Concentrations: What is the pH of a solution co
16. Calculation of pH from Molar Concentrations: What is the pH of a solution containing 0.12 mol/L of NH 4 Cl and 0.03 mol/L of NaOH (p K a of NH 1 4 /NH3 is 9.25)? 16. Calculati…
16. Chlorine has a large negative electron affinity. Therefore, chlorine is most
16. Chlorine has a large negative electron affinity. Therefore, chlorine is most likely to: A) act as an oxidizing agent B) have a small first ionization energy C) act as a reduci…
16. Choose the statement that best describes the SiCls molecule in the gas phase
16. Choose the statement that best describes the SiCls molecule in the gas phase. A) The bond angle are all about 109.5 B) The molecule is polar. C) The molecule has a dipole mome…
16. Consider a solution that is 0.010 M in Ba2+ and 0.020 M in Ca2+. a. If sodiu
16. Consider a solution that is 0.010 M in Ba2+ and 0.020 M in Ca2+. a. If sodium sulfate is used to selectively precipitate one of the cations while leaving the other cation in s…
16. Consider the following hypothetical aqueous reaction: A( aq )B( aq ). A flas
16. Consider the following hypothetical aqueous reaction: A(aq)B(aq). A flask is charged with 0.065 mol of A in a total volume of 1000 mL. The following data are collected: Time (…
16. Dipole-Dipole forces are stronger than London forces because a. London force
16. Dipole-Dipole forces are stronger than London forces because a. London forces have weaker dipoles b. London forces have higher boiling points c. London forces are formed betwe…
16. Explain in words the meaning of the \"octet rule\". 17. Write an equation fo
16. Explain in words the meaning of the "octet rule". 17. Write an equation for the reaction of Calcium metal with molecular oxygen to form calcium oxide. For each reactant and pr…
16. Give the characteristic of a first-order reaction having only one reactant.
16. Give the characteristic of a first-order reaction having only one reactant. A) The rate of the reaction is not proportional to the concentration of the reactant. B) The rate o…
16. Give the number of core electrons for S. A) 14 B) 16 C) 12 D) 8 E) 10 17. Ho
16. Give the number of core electrons for S. A) 14 B) 16 C) 12 D) 8 E) 10 17. How many unpaired electrons are present in the ground state N atom? A) 3 B) 4 C) 1 D) 2 E) 0 18. How …
16. Grignard reagents are prepared by reacting A. an alkyl halide with magnesium
16. Grignard reagents are prepared by reacting A. an alkyl halide with magnesium in ether or THF solvent. B. an alkyl halide with cuprous iodide in ether solvent. C. an alkyl hali…
16. HX is a weak acid with pKa = 6.0. Calculate the equilibrium constant of the
16. HX is a weak acid with pKa = 6.0. Calculate the equilibrium constant of the following reactions So, what this means is that when HX + H2O => X + H30 , Ka = 10^(-6) and when…
16. How many grams of ammonium carbonate are needed to prepare 1.75 liners of a
16. How many grams of ammonium carbonate are needed to prepare 1.75 liners of a 0.333 M solution 17. A compound is found to contain 30.51% carbon. I 60% hydrogen, and 6730% oxygen…
16. How many liters of a 2.5% solution of sucrose would contain the same number
16. How many liters of a 2.5% solution of sucrose would contain the same number of grams of sugar as 3.75 L of a 6.0% sucrose solution? 17. A hydrated compound has an analysis of …
16. If a sample of oxygen gas is collected over water at a pressure of 0.921 atm
16. If a sample of oxygen gas is collected over water at a pressure of 0.921 atm and 23°C, whatis the partial pressure of the oxygen gas? 17. A mixture of gases exerting a pressur…
16. If the pH of an aqueous solution changed from 4.67 to 9.10, what happened to
16. If the pH of an aqueous solution changed from 4.67 to 9.10, what happened to the hydronium ion concentration? A) It decreased. B) It became zero. C) It became less than zero. …
16. In the dilution of lo 0 mLofa0.10 Msolution of HCI to a lume of 20.0 mln wha
16. In the dilution of lo 0 mLofa0.10 Msolution of HCI to a lume of 20.0 mln what remains unchanged? the mass of the HCI solution a, the moles of HC in the solution e. All of the …
16. In valence bond theory, the pi bond between the two carbon atoms in C2H4 res
16. In valence bond theory, the pi bond between the two carbon atoms in C2H4 results from: (1) the overlap of the 2s orbitals from each carbon atom. (2) the overlap of a 2s orbita…
16. Magnesium metal reacts with HCl solution, liberating H2 gas and generating M
16. Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.695-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution…
16. Magnesium metal reacts with HCl solution, liberating H2 gas and generating M
16. Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.695-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution…
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