Chemistry concepts and calculations

1.An industry discharges 700 kg of ammonium chloride (NH4Cl) per hour into a str

1.An industry discharges 700 kg of ammonium chloride (NH4Cl) per hour into a stream. For the purpose of this problem, the stream is divided into three regions (flow rate -2 m/sec)…

1.An industry discharges 700 kg of ammonium chloride (NH4Cl) per hour into a str

1.An industry discharges 700 kg of ammonium chloride (NH4Cl) per hour into a stream. For the purpose of this problem, the stream is divided into three regions (flow rate -2 m/sec)…

1.Answer the following question related to leaving group ability. ______________

1.Answer the following question related to leaving group ability. _______________ is a better leaving group than hydroxide because of ________________. A. Acetate; resonance deloc…

1.Are all combustion reactions redox? Explain. 2.What is the difference between

1.Are all combustion reactions redox? Explain. 2.What is the difference between burning and heating? How can you tell in the lab if you are heating or burning? 3.Redox reaction in…

1.Arrange the following elements in order of decreasing ionization energy. Rank

1.Arrange the following elements in order of decreasing ionization energy. Rank from highest to lowest ionization energy. To rank items as equivalent, overlap them. Lowest ionizat…

1.Arrange the following types of electromagnetic radiation in order of increasin

1.Arrange the following types of electromagnetic radiation in order of increasing (shortest to longest) wavelength from left to right. a)UV radiation < Red visible light < M…

1.As a chemical reaction proceeds, the rate of the reaction tends to: a. increas

1.As a chemical reaction proceeds, the rate of the reaction tends to: a. increase. b. decrease. c. remain constant. d. oscillate. 2.If tripling the concentration of reactant A mul…

1.As a food chemist for a major potato chip company, you are responsible for det

1.As a food chemist for a major potato chip company, you are responsible for determining the sodium content of new potato chip products for the packaging label. The potato chips a…

1.Assuming TCP Reno is the protocol experiencing the behavior described below. I

1.Assuming TCP Reno is the protocol experiencing the behavior described below. Initial Threshold = 36 segments At the transmission round that the 40th segment is sent, segment los…

1.BRIEFLY DESCRIBE using the tables below the three differences phases of the in

1.BRIEFLY DESCRIBE using the tables below the three differences phases of the in-vitro dissolution behavior (and ) between the three solid state forms of carbamazepine (Slide 87 o…

1.Balance the chemical equation given below, and calculate the volume of nitroge

1.Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25°C? The densit…

1.Based on the reaction of halide ions (NaI,NaBr,NaCl) with NaNO2 rank the three

1.Based on the reaction of halide ions (NaI,NaBr,NaCl) with NaNO2 rank the three halide ions in order of decreasing reducing agent strength. Use > to indicate greater strength …

1.Calculate U of a gas for a process in which the gas absorbs 9 J of heat from i

1.Calculate U of a gas for a process in which the gas absorbs 9 J of heat from its surroundings and does 25 J of work by expanding. (NOTE: U is the internal energy of the gas). A)…

1.Calculate the amount of water at its boiling point that would be vaporized by

1.Calculate the amount of water at its boiling point that would be vaporized by 152.0 calories. 2.Calculate the amount of gasoline at its boiling point that would be vaporized by …

1.Calculate the change in enthalpy, in kJ, for the combustion of 6.75 moles of C

1.Calculate the change in enthalpy, in kJ, for the combustion of 6.75 moles of C6H14 in oxygen. Report your answer in scientific notation (X.XXEX) with three significant figures. …

1.Calculate the change in enthalpy, in kJ, for the combustion of 6.75 moles of C

1.Calculate the change in enthalpy, in kJ, for the combustion of 6.75 moles of C6H14 in oxygen. Report your answer in scientific notation (X.XXEX) with three significant figures. …

1.Calculate the concentration of argon in the Pacific Ocean given that the parti

1.Calculate the concentration of argon in the Pacific Ocean given that the partial pressure of argon is 0.00934 atm. The Henry’s law constant for argon in water at 25oC is 1.4 x 1…

1.Calculate the density of a metal sample with a mass of 51.4 g and a volume of

1.Calculate the density of a metal sample with a mass of 51.4 g and a volume of 14.7 mL. Be sure to include units and write an answer to one decimal place. 2.What will be the aver…

1.Calculate the density of a metal sample with a mass of 51.4 g and a volume of

1.Calculate the density of a metal sample with a mass of 51.4 g and a volume of 14.7 mL. Be sure to include units and write an answer to one decimal place. 2.What will be the aver…

1.Calculate the density of nitrogen gas (in g/L) at 939 mm Hg and 50.7 °C. 2.A 1

1.Calculate the density of nitrogen gas (in g/L) at 939 mm Hg and 50.7 °C. 2.A 1.15-g sample of an unknown gas has a volume of 869 mL and a pressure of 551 mm Hg at 41.5 °C. Calcu…

1.Calculate the mass in grams of 3.37x10^25 molecules of ethanol (CJ 3CH2OH). 2.

1.Calculate the mass in grams of 3.37x10^25 molecules of ethanol (CJ 3CH2OH). 2. Vitamin C has the formula C6H8O6. How many atoms of oxygen are in 2.96 g of vitamin C? 3. If Iron …

1.Calculate the mass of 0, 1 mol of protons. Mass of a proton = 1, 7x10 -27 2.Ca

1.Calculate the mass of 0, 1 mol of protons. Mass of a proton = 1, 7x10 -27 2.Calculates the load of 1 mole-e. Charge of an electron = 1, 6x10 ^ -19 3.Calculate the mass of 10 ^ 2…

1.Calculate the mass of KHC 8 H 4 O 4 (molar mass = 204.44g/mol) that reacts wit

1.Calculate the mass of KHC8H4O4 (molar mass = 204.44g/mol) that reacts with 15mL of NaOH solution in part A.3. Express this mass of KHC8H4O4 to the correct number of significant …

1.Calculate the mass of carbon in grams, the percent carbon by mass, and the num

1.Calculate the mass of carbon in grams, the percent carbon by mass, and the number of individual carbon atoms present in 1.66×1021 molecules of carbon monoxide.? 2.Calculate the …

1.Calculate the mass of malonic acid (C 3 H 4 O 4 , MW 104.07 g/mol) required to

1.Calculate the mass of malonic acid (C3H4O4, MW 104.07 g/mol) required to prepare 50.00mL of a 0.15 M malonic acid solution. 2. Calculate the mass of manganese sulfate monohydrat…

1.Calculate the moles of aluminum contined in a 1.25g piece of scrap aluminum 2.

1.Calculate the moles of aluminum contined in a 1.25g piece of scrap aluminum 2.Calculate the moles of alum, KAl(SO4)2.12H2O produced from a 1.25g piece of scrap aluminum. Assume …

1.Calculate the number of moles of PCl5 that can be produced from 30.0 of P4 (an

1.Calculate the number of moles of PCl5 that can be produced from 30.0 of P4 (and excess Cl2 ). 2.Calculate the number of moles of PCl5 that can be produced from 53.0 of Cl2 (and …

1.Calculate the pH needed to start precipitation of tin (II) sulfide from a solu

1.Calculate the pH needed to start precipitation of tin (II) sulfide from a solution containing 0.0049 M of the tin (II) ion. The sulfide ion is produced in a solution saturated w…

1.Calculate the pH of a 0.075 M soultion of hydrazoic acid, which is a weak acid

1.Calculate the pH of a 0.075 M soultion of hydrazoic acid, which is a weak acid. Hydrazoic acid, HN3, has an acid dissociation constant Ka, equal to 1.9 x 10-5. Also, calculate t…

1.Calculate the pH of a solution that is 0.120 M in aceticacid , HC 2 H 3 O 2 ,

1.Calculate the pH of a solution that is 0.120 M in aceticacid , HC2H3O2, and 0.210 M insodium acetate, NaC2H3O2 The Ka ofacetic acid is 1.76 x 10-5. 2. How many grams of sodium a…

1.Calculate the pH of each solution: a)1.55 x 10-2 M HBr b) 2.28 x 10-3 M KOH c)

1.Calculate the pH of each solution: a)1.55 x 10-2 M HBr b) 2.28 x 10-3 M KOH c)8.89 x 10-3 M HNO3 d) 6.54 x 10-4 M Sr(OH)2 2. A buffer contains HCHO2 (aq) and KCHO2 (aq). Which s…

1.Calculate the rate of reaction for the solution to turn from colorless to blue

1.Calculate the rate of reaction for the solution to turn from colorless to blue-black after each addition. Volume Added to Solution 1 Reaction time (s) Total Volume (L) Rate (mol…

1.Choose the correct statement about earthquake waves. a.The vibrations in the P

1.Choose the correct statement about earthquake waves. a.The vibrations in the P-waves and S-waves create gravitational waves. b. Both P-waves and S-waves travel at the same veloc…

1.Comment about the comparison of the infrared spectra of 2-octanol, 2-bromoocta

1.Comment about the comparison of the infrared spectra of 2-octanol, 2-bromooctane, octenes and trans-2-octene, in regard to presence or absence of peaks in trans-2-octene that su…

1.Compute the standard free energy change for the following reaction. N 2 (g) +

1.Compute the standard free energy change for the following reaction. N2(g) + 3H2(g) -> 2NH3(g) Enter your answer in kJ. 2.Estimate the free energy change (?Grxn) for the follo…

1.Consider an experiment in which a candle is placed in a dish of water. The can

1.Consider an experiment in which a candle is placed in a dish of water. The candle is lit and, then covered with a jar. After a short time, the candle flame goes out. a) Why does…

1.Consider the following assignment statement in a C program, where x and y are

1.Consider the following assignment statement in a C program, where x and y are integer variables, and x has been initialized to a valid integer value: y = x + 1; Is it always tru…

1.Consider the following instruction: OR( %1111_0000, AL ) ; After its execution

1.Consider the following instruction: OR( %1111_0000, AL ) ; After its execution, what will be true about the bits stored in AL? Select one: a. The four low-order bits stored in A…

1.Consider the following relational DB schema. Write your SQL statements to crea

1.Consider the following relational DB schema. Write your SQL statements to create the following tables. (30 points) Emp (eid: integer, ename: string, age: integer, salary: real) …

1.Consider the reaction when aqueous solutions of Chromium(II) iodide and sodium

1.Consider the reaction when aqueous solutions of Chromium(II) iodide and sodium acetate are combined. The net ionic equation for this reaction is 2.Consider the reaction when aqu…

1.Consider the scenario: A student accidently reverse the leads of the digital m

1.Consider the scenario: A student accidently reverse the leads of the digital multimeter and use the black lead on the copper half-cell and the red on the zinc, magnesium and iro…

1.Convert 534 mmHg to atm, torr, and kPa (kilo Pascal) 2. A gas occupying a volu

1.Convert 534 mmHg to atm, torr, and kPa (kilo Pascal) 2. A gas occupying a volume of 575 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until it press…

1.Creating Threads Under Windows It is unfortunate that the C++ language didn\'t

1.Creating Threads Under Windows It is unfortunate that the C++ language didn't standardize the method for creating threads. Therefore various compiler vendors invented their own …

1.Defined a structure called that has the following field: a: Name that is strin

1.Defined a structure called that has the following field: a: Name that is string; b: Gpa that is double; c:Age that is int; 2.In main create an array of student called student of…

1.Defined a structure called that has the following field: a: Name that is strin

1.Defined a structure called that has the following field: a: Name that is string; b: Gpa that is double; c:Age that is int; 2.In main create an array of student called student of…

1.Describe the steps executed by a kernel to context-switch between processes. [

1.Describe the steps executed by a kernel to context-switch between processes.   [3 pts] 2.Can you provide a programming example in which multithreading does not provide better pe…

1.Determine the mass of sodium thiosulfate needed to prepare 200 mL of a 0.25 M

1.Determine the mass of sodium thiosulfate needed to prepare 200 mL of a 0.25 M sodium thiosulfate solution. 2. Why is it necressary to keep the total volume of the reagents after…

1.Determine the p K a of the underlined proton in methotrexate. pK a _____ 2.Is

1.Determine the pKa of the underlined proton in methotrexate. pKa _____ 2.Is the pKa of the underlined proton in -fluoromethotrexate lower or higher than methotrexate? Explain you…

1.Determine the pH (to two decimal places) of a solution prepared by adding 51.3

1.Determine the pH (to two decimal places) of a solution prepared by adding 51.3 mL of 0.0915 M sodium hydrogen sulfite (NaHSO3) to 39.4 g of sodium sulfite (Na2SO3). Assume the v…

1.Does the first reaction follow the Markovnikof Rule? 2. What is the complete I

1.Does the first reaction follow the Markovnikof Rule? 2. What is the complete IUPAC name for Compound A? 3. Does Compound A exist as stereoisomers? If so, indicate whether the E …