Chemistry concepts and calculations
117302 questions • Page 104 / 2347
1. Absorption bands tend to be broad as exciting wavelength changes: UV-vis only
1. Absorption bands tend to be broad as exciting wavelength changes: UV-vis only IR only Both Neither 2. Samples being prepared for atomic spectroscopy could be subject to AAS, AE…
1. According to Plancks equation, the energy of a monochromatic light beam depen
1. According to Plancks equation, the energy of a monochromatic light beam depends only on its _____. 2. A photon can interact with an electron in a molecule, atom or ion, in whic…
1. According to molecular orbital theory, is the highest energy orbital that con
1. According to molecular orbital theory, is the highest energy orbital that contains an electron antibonding or bonding in O22- ? 2.Of H2CO and CO and CO2, the compound having th…
1. According to the Joslin Clinic, healthy individuals without diabetes should h
1. According to the Joslin Clinic, healthy individuals without diabetes should have a blood glucose level of no more than 100 mg dL1 after awaking, before breakfast. What is the m…
1. According to the Standard Reduction Potential Table in your textbook, assign
1. According to the Standard Reduction Potential Table in your textbook, assign the anode and cathode for thecell pairs, B1-B2, A1-B2, AND A2-B2 described in the Procedure. 2. Des…
1. According to the collision theory, for a chemical reaction to occur, which of
1. According to the collision theory, for a chemical reaction to occur, which of the following is correct? A) The reactants must be present at a high concentration. B) The collisi…
1. According to the following reaction, how many grams of chlorine gas are requi
1. According to the following reaction, how many grams of chlorine gas are required for the complete reaction of 25.5 grams of iron? iron (s) + chlorine (g) iron(III) chloride (s)…
1. According to the following reaction, how many moles of hydrogen gas will be f
1. According to the following reaction, how many moles of hydrogen gas will be formed upon the complete reaction of 27.7 grams of water? water (l) = hydrogen (g) + oxygen (g) 2. F…
1. According to the general trend in electron affinities, which group (or family
1. According to the general trend in electron affinities, which group (or family) of elements tend to form the most stable anions in the gas phase? A.alkaline earth metals B.halog…
1. According to your data, how is solubility of KNO3 affected by an increase in
1. According to your data, how is solubility of KNO3 affected by an increase in temperature of the solvent? 2. Using your graph, tell if each of these solutions would be saturated…
1. Account for the differences in the results for both sn1 and sn2 reactions. yo
1. Account for the differences in the results for both sn1 and sn2 reactions. your answer needs to address substrate structure, nucleophiles, reaction conditions, and proposed rea…
1. Accounting for the change in concentration due to dilution is a critical aspe
1. Accounting for the change in concentration due to dilution is a critical aspect of this experiment. Calculate the concentration of the I- ions in a solution if 6.0 mL of 0.30 M…
1. Accounting for the change in concentration due to dilution is a critical aspe
1. Accounting for the change in concentration due to dilution is a critical aspect of this experiment. Calculate the concentration of the I- ions in a solution if 6.0 mL of 0.30 M…
1. Acetaminophen (commercially known as Tylenol) can be made by reacting p-amino
1. Acetaminophen (commercially known as Tylenol) can be made by reacting p-aminophenol with acetic anhydride (balanced reaction is presented below) HaC HaC HO NH2 O HO NH CH HO p-…
1. Acetic Acid is an important component of vinegar. A 10.00-mL sample of vinega
1. Acetic Acid is an important component of vinegar. A 10.00-mL sample of vinegar is titrated with 0.5052 M NaOH, and 16.88 mL are required to neutralize the acetic acid that is p…
1. Acetic Acid pK. = 4.76, Ke= 2 Complete the following table using data from yo
1. Acetic Acid pK. = 4.76, Ke= 2 Complete the following table using data from your laboratory notebook M Con aud conj bas Solution HC,H,02 C,H,OC,H,O2PH pH pH difference _ | befor…
1. Acetic acid contains the elements carbon, hydrogen, and oxygen. When 5.00 g o
1. Acetic acid contains the elements carbon, hydrogen, and oxygen. When 5.00 g of acetic acid are burned in air, 7.33g of CO2, and 3.00g of water are obtained. Determine the empir…
1. Acetic acid contains the elements carbon, hydrogen, and oxygen. When 5.00 g o
1. Acetic acid contains the elements carbon, hydrogen, and oxygen. When 5.00 g of acetic acid are burned in air, 7.33g of CO2, and 3.00g of water are obtained. Determine the empir…
1. Acetylsalicyclic acid has a melting point of 135-135.5celsius. For the follow
1. Acetylsalicyclic acid has a melting point of 135-135.5celsius. For the following conditions, what would you expect for the meltingpoint if : a)The above was mixed as a 50:50 mi…
1. Acid-base titrations are an example of an: pH scale reaction equilibrium reac
1. Acid-base titrations are an example of an: pH scale reaction equilibrium reaction thermonuclear reaction first order reaction rate 2: The base ionization constant can be descri…
1. Acids You Have Encountered a. List the names for any three compounds that are
1. Acids You Have Encountered a. List the names for any three compounds that are acids. b. In what context do you know of these acids? For example, is It from reading ingredient l…
1. Activation energy is: Select one: a. Energy that is lost as heat. b. differen
1. Activation energy is: Select one: a. Energy that is lost as heat. b. difference in energy between reactants and products. c. energy that must be added to get a reaction started…
1. Add 0.5 mL of 0.10 M NiCl2 solution to each of 7 test tubes using dropper pro
1. Add 0.5 mL of 0.10 M NiCl2 solution to each of 7 test tubes using dropper provided. Label these tubes 1 through 7. 2. Add the following to the respective tubes containing the N…
1. Add sodium hydroxide to iron(II) chloride iron(lI) hydroxide sodium chloride
1. Add sodium hydroxide to iron(II) chloride iron(lI) hydroxide sodium chloride 3 NaOH(ag) +FeCh (ag) -Fe(OH)s(s) 3Naa (aq) + 2. Mix lead(ll) acetate lead waste and potassium iodi…
1. Add sodium hydroxide to iron(II) chloride iron(lI) hydroxide sodium chloride
1. Add sodium hydroxide to iron(II) chloride iron(lI) hydroxide sodium chloride 3 NaOH(ag) +FeCh (ag) -Fe(OH)s(s) 3Naa (aq) + 2. Mix lead(ll) acetate lead waste and potassium iodi…
1. Adding a catalyst increases the rate of a reaction. If the rate increases, th
1. Adding a catalyst increases the rate of a reaction. If the rate increases, then either k increases or the order of the reaction changes. what experiments might you perform to d…
1. Addition of MnO2 (a catalyst) to the following reaction causes all of the fol
1. Addition of MnO2 (a catalyst) to the following reaction causes all of the following to be true EXCEPT: 2. Which of the following statements is/are true about reaction mechanism…
1. Addition of MnO2 (a catalyst) to the following reaction causes all of the fol
1. Addition of MnO2 (a catalyst) to the following reaction causes all of the following to be true EXCEPT: 2. Which of the following statements is/are true about reaction mechanism…
1. Addition of reactants to a chemical reaction in solution or gas phase at equi
1. Addition of reactants to a chemical reaction in solution or gas phase at equilibrium results in ________ A. a decrease in K and a shift in equilibrium to produce more product…
1. After absorbing 1.850 kJ of heat, the temperature of a 0.500 kg block of copp
1. After absorbing 1.850 kJ of heat, the temperature of a 0.500 kg block of copper metal is 37 °C. What was the initial temperature of the copper? 2. Pioneers used to reheat their…
1. After being open for a long time, the switch, S, in the circuit shown below i
1. After being open for a long time, the switch, S, in the circuit shown below is closed at 0 for 1 ms, and then opened again. Determine the voltage across the 125 resistor for t&…
1. After carefully diluting pasteurized milk samples to 1:10 and 1:100 a lab tec
1. After carefully diluting pasteurized milk samples to 1:10 and 1:100 a lab tech went to sleep and placed 1.1 ml in each plate rather than the normal 1.0 ml. The highest dilution…
1. After the following Dim statement is executed, how many subscripted variables
1. After the following Dim statement is executed, how many subscripted variables called myvar(i) will be available? Dim myVar(7) As Double a. 0 b. 1 c. 8 d. 9 2. …
1. After which stage is the rover on its own and cannot be controlled from Earth
1. After which stage is the rover on its own and cannot be controlled from Earth? a) Landing Stage b) Entry Stage c) Descent Stage d) Cruise Stage 2. After the rovers wh…
1. After you install PHP, you can run php scripts by using ____ . a. Mozilla b.
1. After you install PHP, you can run php scripts by using ____ . a. Mozilla b. Apache c. d. Internet Explorer Both a and c are correct ____ 2. You configure PHP by modifying…
1. AgCl (s) Ag+ (aq) + Cl- (aq) Ksp = 1.8 x 10^-10 Ag+ (aq) + 2S2O3^2- (aq)
1. AgCl (s) <-> Ag+ (aq) + Cl- (aq) Ksp = 1.8 x 10^-10 Ag+ (aq) + 2S2O3^2- (aq) <-> Ag(S2O3)2^3- Kf = 2.9 x 10^13 Consider the two above equilibria. If sodium thiosulf…
1. Air and hydrogen sulphite mixture at 1 atm is fed continuously into a single-
1. Air and hydrogen sulphite mixture at 1 atm is fed continuously into a single-stage mixer with a pure water stream at 20 oC in the opposite direction. The exit gas and the exit …
1. Air from a manufacturing operation was drawn through a solution containing 1.
1. Air from a manufacturing operation was drawn through a solution containing 1.00 x 102 ml of a 0.0405 M hydrobromic acid. After drawing air through the acid solution for 10.0 mi…
1. Air is contained in a piston-cylinder assembly oriented horizontally as shown
1. Air is contained in a piston-cylinder assembly oriented horizontally as shown in the figure below. The air cools from an initial volume of Vir=0.003 m3 to a final volume of vg=…
1. Al 2 S 3 (s) gives off a foul odor characteristic of hydrogen sulfide when it
1. Al2S3(s) gives off a foul odor characteristic of hydrogen sulfide when it is damp. Write a balanced chemical equation for the reaction and discuss it in terms of acid-base co…
1. Al(s) + O2(g) Al2O3(s) (a) Consider the unbalanced equation above. How many g
1. Al(s) + O2(g) Al2O3(s) (a) Consider the unbalanced equation above. How many grams of O2 are required to react with 32.0 g of aluminum? Use at least as many significant figures …
1. Alcohols contain an _____________ group, alkyl halides contain a ____________
1. Alcohols contain an _____________ group, alkyl halides contain a _____________ atom, and ethers contain a ___________ bond . 2. A compound containing 4 carbons and an iodine wo…
1. All atoms have three fundamental parts A )True B) False ) none of the above 2
1. All atoms have three fundamental parts A )True B) False ) none of the above 2. Proton is the most important part of an atom. A)True H) False 3. When a neutral atom loses an ele…
1. All atoms have three fundamental parts A )True B) False ) none of the above 2
1. All atoms have three fundamental parts A )True B) False ) none of the above 2. Proton is the most important part of an atom. A)True H) False 3. When a neutral atom loses an ele…
1. All enzymes are made of A. fats B. carbohydrates C. proteins D. amino acids 2
1. All enzymes are made of A. fats B. carbohydrates C. proteins D. amino acids 2. The combustion reaction, C + O2 = CO2, is A. exothermic B. endothermic C. autocatalytic D. none o…
1. All functions should be written AFTER the main procedure. 2. A function proto
1. All functions should be written AFTER the main procedure. 2. A function prototype should be written for each function and placed BEFORE the main procedure. 3. Each function sho…
1. All of the following are phases (states) of matter EXCEPT . Solid . Liquid Ga
1. All of the following are phases (states) of matter EXCEPT . Solid . Liquid Gas . putty 2. This matter has a fixed shape and volume with particles closely packed together with l…
1. All of the following are phases (states) of matter EXCEPT . Solid . Liquid Ga
1. All of the following are phases (states) of matter EXCEPT . Solid . Liquid Gas . putty 2. This matter has a fixed shape and volume with particles closely packed together with l…
1. All of the following are true for the measurement of standard reduction poten
1. All of the following are true for the measurement of standard reduction potentials, except: I standard conditions for reduction potentials is 25 °C and A = 1 for all aqueous an…
1. All of the items below except one are good design practice. Select the one th
1. All of the items below except one are good design practice. Select the one that is not good practice. Select one: a. Sketch page layout on paper b. Ask volunteers to do a task …
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