Chemistry concepts and calculations

1. In the Bohr model, which two forces are balanced? 2. Which of the following i

1. In the Bohr model, which two forces are balanced? 2. Which of the following is NOT one of the postulates of the Bohr model? 3. When an electron and proton form a hydrogen atom,…

1. In the H NMR, draw the structure of the molecule directly on the spectrum and

1. In the H NMR, draw the structure of the molecule directly on the spectrum and identify each unique proton. Indicate which proton is responsible for each peak. 2. In the IR spec…

1. In the body, the lactase enzyme functions to break down lactose during digest

1. In the body, the lactase enzyme functions to break down lactose during digestion. In light of this, what approximate pH would you expect lactase to be most active? Did your res…

1. In the boxes below draw the interactions between 3 molecules of the following

1. In the boxes below draw the interactions between 3 molecules of the following: NO CO2 2. Which combinations of the following solvents will be miscible? Explain your reasoning. …

1. In the bromination of acetanilide, what was the electrophile? 2. In an experi

1. In the bromination of acetanilide, what was the electrophile? 2. In an experiment, we saw that the -NH(C=O)CH3 group in acetanilide tends to donate electrons into its benzene r…

1. In the conversion of benzil to benzilic acid, what is the main purpose of eth

1. In the conversion of benzil to benzilic acid, what is the main purpose of ethanol? Main purpose of HNO3+? Answer Options: A. It keeps the pH above 4 B. It protonates the carbox…

1. In the equation PV-nRT, R is the gas constant, and has a value of 0.0821 L at

1. In the equation PV-nRT, R is the gas constant, and has a value of 0.0821 L atm/ mol- K. a. If the hot water bath is at a temperature of 95.6°C when you seal the flask, what tem…

1. In the experiment known as \"the Gauss Gun\", a metal sphere (0) is allowed t

1. In the experiment known as "the Gauss Gun", a metal sphere (0) is allowed to roll very slowly towards three other metal spheres attracted to a strong cylindrical magnet as show…

1. In the experiment we determined the freezing point of water to estimate the m

1. In the experiment we determined the freezing point of water to estimate the molecular weight of a volatile organic compound. How will calculations of freezing point depression …

1. In the experiment, what chemical provides the H + (aq) ions? Mg 2+ Mg (s) HCl

1. In the experiment, what chemical provides the H+(aq) ions? Mg2+ Mg (s) HCl (aq) H2 (g) 2. In the experiment you are measuring the volume of what gas? Incorrect: CO2(g) Incorrec…

1. In the experiment, you added water to the reaction vessel after the reaction

1. In the experiment, you added water to the reaction vessel after the reaction was complete, but we did not discuss why. Based on what happened after adding the water, …

1. In the experiment, you will be measuring the time it takes for the solution t

1. In the experiment, you will be measuring the time it takes for the solution to turn blue. If you have initial concentrations of I- = 0.028 M, BrO3- = 0.016 M, H+ = 1.8 x 10-5 M…

1. In the figure the ideal batteries have emfs ? 1 = 10.0 V and ? 2 = 0.500 ? 1

1. In the figure the ideal batteries have emfs ?1 = 10.0 V and ?2 = 0.500 ?1, and the resistances are each 3.61 ?. What is the value of current in (a) resistor 2 and (b) resistor …

1. In the first step of key generation phase in Paillier cryptosystem given here

1. In the first step of key generation phase in Paillier cryptosystem given here. It's given that ( length(p) == length(q) )==> gcd(pq,(p?1(q?1)))=1 where length(k) = # bits in…

1. In the following experiment, a coffee-cup calorimeter containing 100 mL of H2

1. In the following experiment, a coffee-cup calorimeter containing 100 mL of H2O is used. The initial temperature of the calorimeter is 23.0 C. If 4.20 g of CaCl2 is added to the…

1. In the fume hood, place 6 mL (5.6g. 0.056 mole) of cyclohexanol in a 400-mL b

1. In the fume hood, place 6 mL (5.6g. 0.056 mole) of cyclohexanol in a 400-mL beaker. Place the beaker on a magnetic stirrer, add a stir bar, and begin moderate stirring. Clamp a…

1. In the fume hood, place 6 mL (5.6g. 0.056 mole) of cyclohexanol in a 400-mL b

1. In the fume hood, place 6 mL (5.6g. 0.056 mole) of cyclohexanol in a 400-mL beaker. Place the beaker on a magnetic stirrer, add a stir bar, and begin moderate stirring. Clamp a…

1. In the laboratory a \"coffee cup\" calorimeter, or constant pressure calorime

1. In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solu…

1. In the laboratory a student determines the specific heat of a metal as follow

1. In the laboratory a student determines the specific heat of a metal as follows: She heats 19.3 grams of magnesium to 98.55 °C and then drops it into a cup containing 79.5 grams…

1. In the laboratory you dilute 5.39 mL of a concentrated 6.00 M hydrochloric ac

1. In the laboratory you dilute 5.39 mL of a concentrated 6.00 M hydrochloric acid solution to a total volume of 50.0 mL. What is the concentration of the dilute solution? _______…

1. In the laboratory you dissolve 12.6 g of barium acetate in a volumetric flask

1. In the laboratory you dissolve 12.6 g of barium acetate in a volumetric flask and add water to a total volume of 250 mL. What is the molarity of the solution? ____ M. What is t…

1. In the laboratory you dissolve 12.6 g of barium acetate in a volumetric flask

1. In the laboratory you dissolve 12.6 g of barium acetate in a volumetric flask and add water to a total volume of 250 mL. What is the molarity of the solution? ____ M. What is t…

1. In the laboratory you dissolve 21.3 g of manganese(II) sulfate in a volumetri

1. In the laboratory you dissolve 21.3 g of manganese(II) sulfate in a volumetric flask and add water to a total volume of 500 mL. What is the molarity of the solution? M. What i…

1. In the laboratory, a general chemistry student measured the pH of a 0.540 M a

1. In the laboratory, a general chemistry student measured the pH of a 0.540 M aqueous solution of acetylsalicylic acid (aspirin), HC9H7O4 to be 1.880. Use the information she obt…

1. In the laboratory, a general chemistry student measured the pH of a 0.540 M a

1. In the laboratory, a general chemistry student measured the pH of a 0.540 M aqueous solution of triethylamine, (C2H5)3N to be 12.239. Use the information she obtained to determ…

1. In the laboratory, a student adds 44.6 mL of water to 10.8 mL of a 0.763 M pe

1. In the laboratory, a student adds 44.6 mL of water to 10.8 mL of a 0.763 M perchloric acid solution. What is the concentration of the diluted solution ? ______________ M 2. In …

1. In the laboratory, two forms of sodium phosphate will be available (the monob

1. In the laboratory, two forms of sodium phosphate will be available (the monobasic monohydrate NaH2PO4*H2O, F.W = 137.99 g/mol, and the dibasic Na2HPO4, F.W = 141.96 g/mol). Exp…

1. In the photographic developing process, silver bromide is dissolved by adding

1. In the photographic developing process, silver bromide is dissolved by adding sodium thiosulfate. AgBr(s) + 2 Na2S2O3(aq) Na3Ag(S2O3)2(aq) + NaBr(aq) If you want to dissolve 0.…

1. In the process of nylon preparation, NaOH was added to the reaction mixture e

1. In the process of nylon preparation, NaOH was added to the reaction mixture even though it does not appear in the equation for the preparation of nylon. What function does the …

1. In the radical chlorination of butane, a large excess of 1-chlorbutane is use

1. In the radical chlorination of butane, a large excess of 1-chlorbutane is used. How would the results change if there was a 1:1 molar ratio of sulfuryl chloride and 1-chlorobut…

1. In the reaction SnCl4 + 2Cl- SnCl62-, the SnCl4 functions as a(an) ____.

1. In the reaction SnCl4 + 2Cl- <-> SnCl62-, the SnCl4 functions as a(an) ____. A. Brønsted-Lowry acid B. Brønsted-Lowry base C. Arrhenius base D. Lewis acid 2. In the equat…

1. In the titration of 50.00 mL of 0.100 M HCI with 0.100 M NaOH, calculate the

1. In the titration of 50.00 mL of 0.100 M HCI with 0.100 M NaOH, calculate the pH after (a) 0.00 ml, (b) 10.00 ml (c) 25.00 ml, and (d) 50.00 ml of NaOH have been added (at the e…

1. In this distillation experiment we start the experiment with 10 mL of liquid

1. In this distillation experiment we start the experiment with 10 mL of liquid mixture ofcyclohexane and toluene. However, it is not possible to obtain all 10 mL back under thecu…

1. In this distillation experiment we start the experiment with 10 mL of liquid

1. In this distillation experiment we start the experiment with 10 mL of liquid mixture ofcyclohexane and toluene. However, it is not possible to obtain all 10 mL back under thecu…

1. In this experiment we injected the sample to be analyzed by Gas Chromatograph