Chemistry concepts and calculations
117302 questions • Page 2164 / 2347
a. For 1, 1-dichloroethane, benzene, perchloroethylene (tetrachloroethylene), an
a. For 1, 1-dichloroethane, benzene, perchloroethylene (tetrachloroethylene), and methyl t-butyl ether, find a value for the Henry's Law Constant H for each of the four compounds …
a. For a certain reaction, K c = 1.53×10 7 and k f= 22.1 M ?2?s?1 . Calculate th
a. For a certain reaction, Kc= 1.53×107 and kf= 22.1 M?2?s?1 . Calculate the b. For a different reaction, Kc=6.70×103, kf=4.58×103s?1, and kr= 0.684 s?1 . Adding a catalyst increa…
a. For each anion in today\'s experiment: Cl-, I-, PO4-3, SO4-2, use the solubil
a. For each anion in today's experiment: Cl-, I-, PO4-3, SO4-2, use the solubility rules to determine if a precipitate SHOULD form when using the reagents in the procedure. b. Why…
a. For effective purification by recrystallization the compound must be much mor
a. For effective purification by recrystallization the compound must be much more soluble in ___________ solvent than in ____________ solvent, and the impurities must be either___…
a. For the titration of 25.0 mL of 0.1 M HCl (aq) with 0.1 M NaOH (aq), at what
a. For the titration of 25.0 mL of 0.1 M HCl (aq) with 0.1 M NaOH (aq), at what volume of NaOH (aq) should the equivalence point be reached and why? If an additional 3.0 mL of 0.1…
a. From the rule of mixtures, estimate the density of the composite. b. For the
a. From the rule of mixtures, estimate the density of the composite. b. For the overall composite, compute the stiffness in the transverse direction (this is to say in that stress…
a. Gram molar mass of Al2(SO4)3 = 27*2 + 32*3+16*12 = 342g/mole mass of Al2(SO4)
a. Gram molar mass of Al2(SO4)3 = 27*2 + 32*3+16*12 = 342g/mole mass of Al2(SO4)3 = no of moles of Al2(SO4)3 * gram molar mass of Al2(SO4)3 …
a. Higher, lower b. Lower, higher c. Higher, higher d. Lower, lower e. None of t
a. Higher, lower b. Lower, higher c. Higher, higher d. Lower, lower e. None of the above 11. The following cation will be: a. Aromatic b. Heteroaromatic c. Antiaromatic d. Both a …
a. How is the binding of HPRG to heparin dependent on pH? Give structural reason
a. How is the binding of HPRG to heparin dependent on pH? Give structural reasons for the binding dependence. The structure of heparin is shown in Figure 2.2. b. The same binding …
a. How is the binding of HPRG to heparin dependent on pH? Give structural reason
a. How is the binding of HPRG to heparin dependent on pH? Give structural reasons for the binding dependence. The structure of heparin is shown in Figure 2.2. b. The same binding …
a. How many moles of the weak acid were added to the beaker? b. How many moles o
a. How many moles of the weak acid were added to the beaker? b. How many moles of NaOH are required to neutralize the samp…
a. How might you use a precipitation reaction to prepare a sample of Ca 3 (PO 4
a. How might you use a precipitation reaction to prepare a sample of Ca3(PO4)2? Write a molecular equation and then the net ionic equation. b. Assume that you have an a…
a. I am trying to take a picture with my phone that has a resolution of 1 megapi
a. I am trying to take a picture with my phone that has a resolution of 1 megapixel and it comes blurry. So I switch to my digital camera that has a resolution of 8 megapixels and…
a. II, V b. I, III, IV c. I, II, III d. II, IV, V e. I, II, IV Based on the phas
a. II, V b. I, III, IV c. I, II, III d. II, IV, V e. I, II, IV Based on the phase diagram shown below, which of the following statement are correct? Sublimation occurs at a point …
a. Identify the compound as a strong acid, strong base, weak acid or weak base o
a. Identify the compound as a strong acid, strong base, weak acid or weak base or neutral: b. Write/predicting the balanced chemical equation (net ionic equation) for the dissocia…
a. Identify the compound as a strong acid, strong base, weak acid or weak base o
a. Identify the compound as a strong acid, strong base, weak acid or weak base or neutral: b. Write/predicting the balanced chemical equation(net ionic equation) for the dissociat…
a. If a 1.303 g sample of aluminum metal is heated in a chlorine gas atmosphere,
a. If a 1.303 g sample of aluminum metal is heated in a chlorine gas atmosphere, the mass of aluminum chloride produced is 6.438 g. Calculate the empirical formula of aluminum chl…
a. If a salt with a polyatomic anion is dissolved in water, the salt tends to di
a. If a salt with a polyatomic anion is dissolved in water, the salt tends to dissolve such that the cation and anionic groups separate but the elements in the anion are still str…
a. If mercury has a S.G. of 13.6, what is it\'s density in Ibm/ft^3? b. A storag
a. If mercury has a S.G. of 13.6, what is it's density in Ibm/ft^3? b. A storage tank is pressurized with ethane to 450 psi. At the top of the tank are two ports. The first has a …
a. If you had 1 mole of CaSO4.2H2O, how many moles of H2O would you have? b. If
a. If you had 1 mole of CaSO4.2H2O, how many moles of H2O would you have? b. If you had 0.681 moles of CaSO4.2H2O, how many moles of H2O would you have? 2. You have a 1.00 g sampl…
a. If you have 1 million protons, how many of them will undergo a transition fro
a. If you have 1 million protons, how many of them will undergo a transition from the low to high energy spin state if the proper amount of energy is added? b. Now answer the same…
a. In a chemical reaction two gases combine to form a solid.What do you expect t
a. In a chemical reaction two gases combine to form a solid.What do you expect the sign of S to be? b. For each of these processes, is the entropy change positiveor negative? i…
a. In the first column (pH), predict whether an aqueous solution of the compound
a. In the first column (pH), predict whether an aqueous solution of the compound would be acidic (a), basic (b) or neutral (n). Refer to your lab manual, pp. 30-31. b. In the corr…
a. Insert into PROJECT. b. Insert
a. Insert <‘ProductA’, 4, ‘Bellaire’, 2> into PROJECT. b. Insert <‘Production’, 4, ‘943775543’, ‘2007-10-01’> into DEPARTMENT. c. Delete the EMPLOYEE tuple with Ssn = …
a. It will convert completely to the linear form. b. It will remain in solution,
a. It will convert completely to the linear form. b. It will remain in solution, as is. 2. Which statement about stereoisomers is false? a. D- and L-isomers are mirror images of e…
a. KCL b. NH4NO3 c. NaNO2 d. NaF e. KCN **PLEASE SHOW WORK** Formula Name Value
a. KCL b. NH4NO3 c. NaNO2 d. NaF e. KCN **PLEASE SHOW WORK** Formula Name Value of K HSO HCIO2 HC2H,CIO2 HF HNO HC2H,O2 Hydrogen sulfate ion Chlorous acid Monochloracetic acid Hyd…
a. Let L be a language over an alphabet S and x and y strings in S*. x and y are
a. Let L be a language over an alphabet S and x and y strings in S*. x and y are 'distinguishable' by L if there exists a string z in S* such that xz is in L, but yz is not in L. …
a. Look at the following array declarations and indicate the number of elements
a. Look at the following array declarations and indicate the number of elements in each array: 1. Dim dblNums(100) As Double 2. Dim intValues() As Integer = {99, 99, 99} 3. Dim in…
a. Look at the heights of the peaks. b. 1-Propanol would have two types of carbo
a. Look at the heights of the peaks. b. 1-Propanol would have two types of carbon atoms and 2-propanol would have only one type. c. Would be unable to tell using only 13C NMR. d. …
a. Mixer b. Overall c. Separator d. Reactor C3H6 + CO + H2 C4H80 In an existing
a. Mixer b. Overall c. Separator d. Reactor C3H6 + CO + H2 C4H80 In an existing process, 180 kgmol/h of C,H, (P) is mixed with 420 kgmol/h of a mixture containing 50% CO (C) and 5…
a. Nitric acid and phosphoric acid are inorganic acids,whereas acetylsalicylic a
a. Nitric acid and phosphoric acid are inorganic acids,whereas acetylsalicylic acid, ascorbic acid, and citric acid areorganic acids. Do organic acids possess mobile charge carrie…
a. Outline, but do not implement in Java, a recursive solution for finding the s
a. Outline, but do not implement in Java, a recursive solution for finding the smallest value in an array. b. Show the Java code for a recursive method called reverse(String text)…
a. Please show how the weak base OCl - (aq), hypochlorite, will react with stron
a. Please show how the weak base OCl- (aq), hypochlorite, will react with strong acid, H3O+ (aq), in a neutralization reaction. To answer this, please create two equilibria (one f…
a. Please show how the weak base OCl - (aq), hypochlorite, will react with stron
a. Please show how the weak base OCl- (aq), hypochlorite, will react with strong acid, H3O+ (aq), in a neutralization reaction. To answer this, please create two equilibria (one f…
a. Potassium permanganate solutions generally decompose slowly at room temperatu
a. Potassium permanganate solutions generally decompose slowly at room temperature, and the KMnO_4 concentration decreases with time from the preparation of the solution. Suppose …
a. Provid equations for the individual steps, with the rate orders you would exp
a. Provid equations for the individual steps, with the rate orders you would expect based on the of the in alsteps. Remember to avoid expressi terms of , and D, as necessary). You…
a. Provid equations for the individual steps, with the rate orders you would exp
a. Provid equations for the individual steps, with the rate orders you would expect based on the of the in alsteps. Remember to avoid expressi terms of , and D, as necessary). You…
a. Provide the reagents necessary to complete the following transformations ( or
a. Provide the reagents necessary to complete the following transformations ( or more steps may be required for each arrow). Pay attention to stereochemistry. H OH H S + enantiome…
a. Radio station JAVA wants a class to keep track of recordings it plays. Create
a. Radio station JAVA wants a class to keep track of recordings it plays. Create a class named Recording that contains fields to hold methods for setting and getting a Recording’s…
a. Rank the following compounds from strongest to weakest intermolecular forces.
a. Rank the following compounds from strongest to weakest intermolecular forces. For two compounds with the same dominant intermolecular force explain how you determined their rel…
a. Remove the drop suspended from a pipet tip by. b. The finger used to control
a. Remove the drop suspended from a pipet tip by. b. The finger used to control the delivery of liquid from a pipet is the OS c. What should be done with the last bit of liquid re…
a. Several standard enthalpies of formation are given below. Use these data to c
a. Several standard enthalpies of formation are given below. Use these data to calculate the standard enthalpy of vaporization of bromine. Br(g) 111.9 Br2() Br2(g) 30.9 Hvap° =___…
a. Since both compounds have four types of carbon atoms, more information would
a. Since both compounds have four types of carbon atoms, more information would be needed. b. The carbonyl carbon would appear around 200 ppm for the ketone while the sp2 carbon a…
a. Suppose that at time ta the state function of a one particle system is = (2/c
a. Suppose that at time ta the state function of a one particle system is = (2/c2)3/4 e(exp [– (x2 + y2 + z2)/c2)] where c = 2 nm. Find the probability that a measurement of the p…
a. Suppose that it is not possible for you to equalize the levels of water in th
a. Suppose that it is not possible for you to equalize the levels of water in the flask and the beaker (because of some geometric constraint) before you measure the volume of wate…
a. Suppose you allow the reaction above to procede to equilibrium at 25 C and fi
a. Suppose you allow the reaction above to procede to equilibrium at 25 C and find the concentrations of maltose and glucose to be as shown above. Use these equilibrium conditions…
a. Tetrahydropyran has a boiling point of 88 C, and cyclopentanol has a boiling
a. Tetrahydropyran has a boiling point of 88 C, and cyclopentanol has a boiling point of 141 C. These two isomers have a boiling point difference of 53 C. Explain why the two oxyg…
a. The Dumas method was one of the first reliable techniques for determining the
a. The Dumas method was one of the first reliable techniques for determining the molar mass of a volatile liquid. In this method, a liquid is boiled inside an open glass bulb so t…
a. The Hºsoln (standard state) of KCl is +17.2 kJ/mole (Gas = 1 atm pressure, pu
a. The Hºsoln (standard state) of KCl is +17.2 kJ/mole (Gas = 1 atm pressure, pure gas, Liquid = 1 mole pure liquid, Solid = 1 mole pure compounds, Solutes = 1 M dissolved solute,…
a. The above reaction is allowed to reach equilibriumforming a yellow solution.
a. The above reaction is allowed to reach equilibriumforming a yellow solution. What happens to the color if moreof A is added to the reaction mixture? Explain. b. A reagent is ad…
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