Chemistry concepts and calculations

1) Three long straight wires are all in the xy-plane and directed parallel to th

1) Three long straight wires are all in the xy-plane and directed parallel to the y-axis. The first wire is at x =-2 m and has a current of 0.3 A flowing through it in the negatve…

1) Titration reveals that 11.6 mL of 3.0 M sulfuric acid are required to neutral

1) Titration reveals that 11.6 mL of 3.0 M sulfuric acid are required to neutralize the sodium hydroxide in 25.00 mL of NaOH solution. What is the molarity of the NaOH solution? P…

1) To calculate the pH of a weak acid. I know the concentration of the acid and

1) To calculate the pH of a weak acid. I know the concentration of the acid and its conjugate base, the volume of the solution, and the temperature ( 30 degrees celsius). what els…

1) To identify a diatomic gas (X2), a researcher carried out the following exper

1) To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 5.2-L bulb, then filled it with the gas at 1.60 atm and 27.0 C and weig…

1) Today our muscles suppply what percentage of work done? What was this percent

1) Today our muscles suppply what percentage of work done?    What was this percentage in 1950? What was this percentage in 1800? What was this percentage 5 million years ago? 2) …

1) True or False A) Enthalpyisanintensiveproperty._____________ B) The enthalpy

1) True or False A) Enthalpyisanintensiveproperty._____________ B) The enthalpy change for a reaction is equal in magnitude, but opposite in sign, to the enthalpy change for the r…

1) Two components have Rf values of 0.2 and 0.6 respectively when TLC is perform

1) Two components have Rf values of 0.2 and 0.6 respectively when TLC is performed on silica gel in 70% CH2Cl2-30% CH3OH. Would you expect these Rf values to increase or decrease …

1) Two gases, A and B, are placed in an empty, 2.43-liter container at 500 °C. W

1) Two gases, A and B, are placed in an empty, 2.43-liter container at 500 °C. When equilibrium is established, 2.05 mol A, 2.83 mol B, and 0.74 mol C are present. Evaluate Kc for…

1) Two substances obtained from different sources each melt at148 - 150 degrees

1) Two substances obtained from different sources each melt at148 - 150 degrees celsius . Are they the same ? explain 2) Benzoic acid and 2 naphthol each melt at 122 degrees celsi…

1) UO2+4HF -> UF4+2H2O. How may liters of 3.55M HF will react with 3.47 kg of UO

1) UO2+4HF -> UF4+2H2O. How may liters of 3.55M HF will react with 3.47 kg of UO2 ?? 2) If 0.4893 gms of a mix of Al(OH)3 and Mg(OH)2 is neutralised by 17.28 ml of 1M HNO3, wha…

1) Use Table 1 to determine the reaction order for HCl 2) Use Table 2 to determi

1) Use Table 1 to determine the reaction order for HCl 2) Use Table 2 to determine the reaction order for Na2S2O3 3) Write the rate law for the reaction 4)Using the rate Law, the …

1) Use soilubility rules to determine if the products that will be formed will p

1) Use soilubility rules to determine if the products that will be formed will precipitate (s) or will remain in solution (aq) . Balance the reaction and provide the net ionic equ…

1) Use tabulated half-cell potentials to calculate ? G ?rxn for each of the foll

1) Use tabulated half-cell potentials to calculate ?G?rxn for each of the following reactions at 25 ?C. Br2(l)+2Cl?(aq)?2Br?(aq)+Cl2(g) 2) Determine the minimum volume of 3.8 M HI…

1) Use the References to access important values if needed for this question. 1

1) Use the References to access important values if needed for this question. 1 pt 1req The element bromine has an atomic weight of 79.9 and consists of two stable isotopes bromin…

1) Use the following percent composition data to find the empirical formula of t

1) Use the following percent composition data to find the empirical formula of the molecule (refer to the combustion, or percent composition, examples in your lab manual if you do…

1) Use the following percent composition data to find the empirical formula of t

1) Use the following percent composition data to find the empirical formula of the molecule (refer to the combustion, or percent composition, examples in your lab manual if you do…

1) Use the following values to answer the questions below: K sp of AgOH = 1.50 x

1) Use the following values to answer the questions below: Ksp of AgOH = 1.50 x 10-8 Ka of HC2H3O2 = 1.74 x 10-5 -What is the concentration of Ag+1 in a saturated solution of AgOH…

1) Use the items in the space below to construct a flow chart for the procedure

1) Use the items in the space below to construct a flow chart for the procedure you will use to create a iron nitrate solution during the incestigating of Iron Thiocyanate laborat…

1) Use the molarity of the EDTA solution and the average volume of EDTA added to

1) Use the molarity of the EDTA solution and the average volume of EDTA added to calculate the average number of moles of EDTA required for the titration. Molarity EDTA= .01 &…

1) Use the table of standard reduction potentials given above to calculate the e

1) Use the table of standard reduction potentials given above to calculate the equilibrium constant at standard temperature (25 C) for the following reaction: Fe(s)+Ni2+(aq)Fe2+(a…

1) Use the tabulated half-cell potentials to calculate delta G degrees for the f

1) Use the tabulated half-cell potentials to calculate delta G degrees for the following redox reaction. 2 Al (s) + 3 Mg2+ (aq) -------> 2 Al3+ (aq) + 3 Mg (s) A) +6.8 x102 KJ …

1) Using Faraday\'s Law what does the y-intercepet represent for the first graph

1) Using Faraday's Law what does the y-intercepet represent for the first graph? 2) Would you use a Linear fitting trendline or a Power fitting trendline to best represent this gr…

1) Using Faraday\'s Law, what does the y-intercept represent for the first graph

1) Using Faraday's Law, what does the y-intercept represent for the first graph? 2) Would a linear trendline or a power trendline be best for this graph? why whould the chosen tre…

1) Using the balanced chemical equations, use unit-analysis to complete each pro

1) Using the balanced chemical equations, use unit-analysis to complete each problem. Show all work: 2Al (s) + 6HCl (aq) -> 2 AlCl3 (aq) + H2 (g) a. How many moles of hydrogen …

1) Using the computational output (water (H2O) NBO) provided on the webpage for

1) Using the computational output (water (H2O) NBO) provided on the webpage for this experiment, view each of the O-atom lone pairs and provide a rough sketch of them. Comment on …

1) Using the computational output (water (H2O) NBO) provided on the webpage for

1) Using the computational output (water (H2O) NBO) provided on the webpage for this experiment, view each of the O-atom lone pairs and provide a rough sketch of them. Comment on …

1) Using the half-reaction method, balance the following oxidation-reduction rea

1) Using the half-reaction method, balance the following oxidation-reduction reaction which occurs in acidic solution. Be sure to show the each step in balancing both half-reactio…

1) Using the reduction potentials table in the notes/book, what is the standard

1) Using the reduction potentials table in the notes/book, what is the standard cell potential for the following electrochemical cell: Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) 2) Usin…

1) Using the standard reduction potentials table in your book/notes, what is the

1) Using the standard reduction potentials table in your book/notes, what is the standard change in gibbs free energy for the following reaction in kJ? 2NO3-(aq) + 8H+(aq) + 3Cu(s…

1) Wachusetts reservoir holds 2.46*10^11 liters of drinking water. An industrial

1) Wachusetts reservoir holds 2.46*10^11 liters of drinking water. An industrial accident has led to the spill of 7.5* 10^3 kg of potassium cyanide into the reservoir generating t…

1) Wachusetts reservoir holds 2.46*10^14 liters of drinking water. An industrial

1) Wachusetts reservoir holds 2.46*10^14 liters of drinking water. An industrial accident has led to the spill of 3.75* 10^9 kg of sodium cyanide into the reservoir generating the…

1) We have assumed that the unknown does not dissociate into more than one parti

1) We have assumed that the unknown does not dissociate into more than one particle when dissolved. If this was an incorrect assumption and the solid did dissociate slightly. Then…

1) We have assumed that the unknown does not dissociate into more than one parti

1) We have assumed that the unknown does not dissociate into more than one particle when dissolved. If this was an incorrect assumption and the solid did dissociate slightly. Then…

1) We have assumed that the unknown does not dissociate into more than one parti

1) We have assumed that the unknown does not dissociate into more than one particle when dissolved. If this was an incorrect assumption and the solid did dissociate slightly. Then…

1) We observe that 35.2 mL of H2SO4 (98.1 g/mol) solution reacts with 0.355 gram

1) We observe that 35.2 mL of H2SO4 (98.1 g/mol) solution reacts with 0.355 grams of Na2CO3 (105.99 g/mol): H2SO4 + Na2CO3 Na2SO4 + H2O + CO2 What is the molarity of the H2SO4 sol…

1) We purchased a Cobalt-60 source of the nuclear lab that you will be conductin

1) We purchased a Cobalt-60 source of the nuclear lab that you will be conducting. The half-life of this isotope is 5.27 years. If this radiation source has an initial activity of…

1) What absorbance value corresponds to 43.1% T? 2) If a 0.0109 M solution of a

1) What absorbance value corresponds to 43.1% T? 2) If a 0.0109 M solution of a certain analyte exhibits 43.1% T at a wavelength of 280 nm, what will the percent transmittance be …

1) What are the advantages of hollow asymmetric membrane compared to symmetric m

1) What are the advantages of hollow asymmetric membrane compared to symmetric membrane ? 2) What are the advantages of hollow fiber membranes compared to other geometries ? when …

1) What combination of a molecular base and a salt of the conjugate acid of the

1) What combination of a molecular base and a salt of the conjugate acid of the molecular base should you select to prepare a buffer solution that would maintain a pH of approxima…

1) What does a steeper line on the temperature against energy graph mean? A new

1) What does a steeper line on the temperature against energy graph mean? A new liquid is added to the experiment and measured to have a greater specific heat than water. How woul…

1) What happens to iodine when iodate ions, IO3-, are converted to iodine molecu

1) What happens to iodine when iodate ions, IO3-, are converted to iodine molecules, I2? A - It undergoes reduction and it's oxidation numbers changes from -1 to 0 B - It undergoe…

1) What information is used by a process running on one host to identify a proce

1) What information is used by a process running on one host to identify a process running on another host? Explain. 2) Why HTTP is said to be a stateless protocol? Explain. 3) DN…

1) What is garbage? http://www.youtube.com/watch?v=mjjGQRTTp-4&NR=1 2) TerraCycl

1) What is garbage? http://www.youtube.com/watch?v=mjjGQRTTp-4&NR=1 2) TerraCycle products and upcycling. http://www.youtube.com/watch?v=Mmh-MRLc2zo 3) TerraCycle worm poop. h…

1) What is output by this program: #include using namespace std; void plusses (i

1) What is output by this program: #include using namespace std; void plusses (int num){ static int number=0; number++;   cout< }//plusses void main() { plusses(3); plusses(6);…

1) What is stored in result after the following code is executed? String text =

1) What is stored in result after the following code is executed? String text = "I love this class."; String result = text.substring(2, 9); 2) In Java, arrays are Select one: prim…

1) What is the -OH ion concentration in lemon juice having a pH of 2.4? a. 2.51E

1) What is the -OH ion concentration in lemon juice having a pH of 2.4? a. 2.51EE-12 M b. 4.0EE-2 M c. 250 M d. 3.98EE-17 M e. 4.0EE-3 M f. 11.6 M 2) What is the pH of 0.183 M aqu…

1) What is the Ideal Gas Law? The Ideal Gas Law was created because it can be ha

1) What is the Ideal Gas Law? The Ideal Gas Law was created because it can be hard to describe real gases; this concept helps give a prediction of the gases reaction. Ideal gases …

1) What is the approximate bond angle in the Co32- ion? a) 90 b) 109.5 c) 120° d

1) What is the approximate bond angle in the Co32- ion? a) 90 b) 109.5 c) 120° d) 180 e) 60 2) What is the molecular geometry around the carbon atom noted with an arrow below? ?? …

1) What is the boiling point (in degrees Celsius) of chloroform on the moon? Cal

1) What is the boiling point (in degrees Celsius) of chloroform on the moon? Calculate using the Clausius-Clapeyron equation. ln(P2/P1)= deltaH/R (1/T1-1/T2) 2) Secondly, what pha…

1) What is the concentration of HCl in the final solution when diluted with pure

1) What is the concentration of HCl in the final solution when diluted with pure water to a total volume of 0.15 1? 2) How many milliliters of a 9.0 M H2504 solution are needed to…