Chemistry concepts and calculations

We did a lab to separate iron from aluminum ore. Here is some specifics on it th

We did a lab to separate iron from aluminum ore. Here is some specifics on it that will help answer my question which is at the end... Background: In this experiment you will be g…

We did a lab where an unknown solution was added to three test tubes. Each test

We did a lab where an unknown solution was added to three test tubes. Each test tube contained the following: Tube 1: 2 ml unknown 10 ml water 5 drops 4.5% acetic acid C2H4O2 1/2 …

We did a lab where we prepared an acetate buffer. We were asked to report the ma

We did a lab where we prepared an acetate buffer. We were asked to report the mass in grams of base and acid neededto prepare the acetate buffer solution, and the resulting pH. Iu…

We did a lab where we used spectrophotometry to find the % iron inan unknown sam

We did a lab where we used spectrophotometry to find the % iron inan unknown sample. We used a standard iron solution that Icalculated to be 0.005013 M because I weighed 0.0280 g …

We did an Vitamin C Titration experiment. We got 2 tablets of Vitamin C and crus

We did an Vitamin C Titration experiment. We got 2 tablets of Vitamin C and crushed them up and seperated into 3 flasks. We then added 50 mL of distilled water and added 3 drops o…

We did an experiment using blue dye and NAClO. Our reaction order with respect t

We did an experiment using blue dye and NAClO. Our reaction order with respect to the dye was first order and our reaction order with respect to the ClO- was second order. 1. Reac…

We did an experiment with a bomb calorimeter. We placed a pellet of benzoic acid

We did an experiment with a bomb calorimeter. We placed a pellet of benzoic acid which weighed 0.8214g with a wire that weighed 0.0150g. The delta U of benzoic acid is6317.8 cal/g…

We did experiment to synthesize Triphenylmethanol using grignard reagent, which

We did experiment to synthesize Triphenylmethanol using grignard reagent, which is phenylmagnesium bromide shown above. The questions are : 1-When Grignard reagent is prepared, wh…

We did the following reactions: 1) Cu(s) + 4HNO3(aq) ? Cu(NO3)2(aq) + 2NO2(g) +

We did the following reactions: 1) Cu(s) + 4HNO3(aq) ? Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) 2) 2HNO3(aq) + Na2CO3(s) ? H2O(l) + CO2(g) + 2NaNO3(aq) This step was done with step three …

We did the following reactions: 1) Cu(s) + 4HNO3(aq) ? Cu(NO3)2(aq) + 2NO2(g) +

We did the following reactions: 1) Cu(s) + 4HNO3(aq) ? Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) 2) 2HNO3(aq) + Na2CO3(s) ? H2O(l) + CO2(g) + 2NaNO3(aq) This step was done with step three …

We did the synthesis and purification of butyl acetate experiment and during the

We did the synthesis and purification of butyl acetate experiment and during the seperation stage, we added Sodium carbonate into the ester and water layered solution in the seper…

We discussed in class that James Prescott Joule tried but failed to measure the

We discussed in class that James Prescott Joule tried but failed to measure the internal pressure of a gas. In Joule?s experiment, two spherical vessels were immersed in a bath of…

We discussed in class that James Prescott Joule tried but failed to measure the

We discussed in class that James Prescott Joule tried but failed to measure the internal pressure of a gas. In Joule's experiment, two spherical vessels were immersed in a bath of…

We discussed in class that james Prescott Joule tried but failed to measure the

We discussed in class that james Prescott Joule tried but failed to measure the internal pressure of a gas. In Joule's experiment, two spherical vessels were immersed in a bath of…

We don\'t have a textbook for this class and the lecture notes are very vague. P

We don't have a textbook for this class and the lecture notes are very vague.  Please Explain or show steps. 1) In the reacion between aluminum metal and Ni2+(aq), the Ni2+ is the…

We don\'t have a textbook for this class and the lecture notes are very vague. P

We don't have a textbook for this class and the lecture notes are very vague. Please Explain or show steps. 1) In the reacion between aluminum metal and Ni2+(aq), the Ni2+is the o…

We draw resonance contributors connected with one double-headed arrow, but we dr

We draw resonance contributors connected with one double-headed arrow, but we draw tautomers connected by a pair of arrows (forward and reverse). This distinction is made because:…

We earlier investigated the probability density of a 1s orbital and discovered t

We earlier investigated the probability density of a 1s orbital and discovered that there was a greater probability for electrons to be found near the nucleus. Now we are investig…

We fill a flask with one kilogram of water and stir it with an Ultrapure agitato

We fill a flask with one kilogram of water and stir it with an Ultrapure agitator. This is a piece of laboratory equipment for vigorous stirring. The stirring power or work flow i…

We generally assume that the volume of a solution is equal to the volume of solv

We generally assume that the volume of a solution is equal to the volume of solvent a) This is based on the idea that solute-solvent interactions are approximately equal to the so…

We had an assignment for our class where we had to create a Tic-tac-toe game. Pe

We had an assignment for our class where we had to create a Tic-tac-toe game. People like to complicate themselves, so they wrote complex games which included menus. At the end of…

We had an experiment in my chem lab. We used NaCO3(s), HCl (aq) and color indica

We had an experiment in my chem lab. We used NaCO3(s), HCl (aq) and color indicator to see how much NaCO3(s) do we need to add for all the CO2 to leave the solution and the soluti…

We had an experiment on ALDOL CONDENSATION – SYNTHESIS OF DIBENZALACETONE Please

We had an experiment on ALDOL CONDENSATION – SYNTHESIS OF DIBENZALACETONE Please answer the following: 1) The product formed has a pale yellow color. Why? 2) Why is C=O stretching…

We have + a HMAC key (128 bit/16 bytes) + an AES key (128 bit/16 bytes) + an AES

We have + a HMAC key (128 bit/16 bytes) + an AES key (128 bit/16 bytes) + an AES IV (128 bit/16 bytes) +a random salt (128 bit/16 bytes) Each packet is signed with a HMAC (SHA256)…

We have 1.62 mol of a gas at 600 K and 8 atm, which are subjected to an expansio

We have 1.62 mol of a gas at 600 K and 8 atm, which are subjected to an expansion up to a volume of 50 L, performing for this a work of 3, 108.41 cal. By a different process and f…

We have 100.0 mL of 1.0 M formic acid, HCOOH solution. We determine the millimol

We have 100.0 mL of 1.0 M formic acid, HCOOH solution. We determine the millimoles of HCOOH in the solution as (100.0 mL)*(1.0 M) = 100.0 mmole. We are preparing a 1:1 buffer by a…

We have 5 objects, and the weights and values are No. 1 2 3 4 5 w 10 20 30 40 50

We have 5 objects, and the weights and values are No.      1          2          3          4          5 w         10        20        30        40        50 v          20        …

We have N distinguishable particles. Each particle from(1 to N) can adopt a coun

We have N distinguishable particles. Each particle from(1 to N) can adopt a countably infinite number of microstates (ia) that can be labelled ia=0,1,2,3...... with corresponding …

We have a 10.0 L flask containing Cl2 gas and a 10.0 L flask containing Ar gas.

We have a 10.0 L flask containing Cl2 gas and a 10.0 L flask containing Ar gas. A. Which contains the largest number of molecules? (Please briefly explain) B. Which flask do the m…

We have a 4 to 1 ratio of Vanillin to NaBH4 We need to use 2.50mmol of vanillin

We have a 4 to 1 ratio of Vanillin to NaBH4 We need to use 2.50mmol of vanillin MW of Vanillin=152.2 MW of NaBH4=37.83 So the amount of Vanillin we will have to use is.380g but I …

We have a C++ application, with C++ interfaces changing regularly during develop

We have a C++ application, with C++ interfaces changing regularly during development. We also have a C API which is designed to be stable in spite of such changes; the C API is ti…

We have a Linux router which firewalls incoming traffic, while allowing the 300+

We have a Linux router which firewalls incoming traffic, while allowing the 300+ hosts on our local network to make outgoing connections to the Internet. I suspect that a few "ban…

We have a SQL Server 2012 Enterprise edition and an ASP.NET Web API 2.2 web serv

We have a SQL Server 2012 Enterprise edition and an ASP.NET Web API 2.2 web service. The web API is the public interface for the database. We need to end a production order doing:…

We have a binary distillation column. The feed flow rate, F and the mole fractio

We have a binary distillation column. The feed flow rate, F and the mole fraction of the most volatile compound in the feed, z, and the initial feed temperature are constant. The …

We have a closed-source commercial C++ application. Some of our logged error mes

We have a closed-source commercial C++ application. Some of our logged error messages are in plain English like "ERROR: could not read file 'foo'". While others use a macro to pri…

We have a context of the application which is a static class named Holder contai

We have a context of the application which is a static class named Holder containing several static properties initialized by objects that are used throughout the application. All…

We have a core document, say, a series of standards, that, based on that, we cre

We have a core document, say, a series of standards, that, based on that, we create solution guides, promotional materials, or other supporting documents. The idea is that every t…

We have a couple servers with a host system, and virtual DB and Web instances. I

We have a couple servers with a host system, and virtual DB and Web instances. Is it possible to be compliant with PCI if you install the Antivirus only on the host system, or doe…

We have a cylinder with 2.0 mol N_2, along with pentane (C5) and hexane (C6). Th

We have a cylinder with 2.0 mol N_2, along with pentane (C5) and hexane (C6). The cylinder has a moveable piston in it, which has a weight to keep P = 5.5 bar. At the initial temp…

We have a defined and certified scope. If we have a business event that impacts

We have a defined and certified scope. If we have a business event that impacts the services or a building that is "in" scope and we have to shut that building down and recover se…

We have a function that modifies a JS object, by adding some custom properties t

We have a function that modifies a JS object, by adding some custom properties to it. The function doesn't return antyhing addTransaction: function (obj) {      obj.transactionId …

We have a huge C, and C++ code base. There is a plan to add a new feature into t

We have a huge C, and C++ code base. There is a plan to add a new feature into the existing system, but, this should happen only after 3 to 4 months. So, we are looking for best p…

We have a job table that triggers a notification when a new job gets inserted. C

We have a job table that triggers a notification when a new job gets inserted. Clients that can handle such jobs may subscribe to those notifications. When a client receives a not…

We have a long-standing ActiveSync device policy that requires an unlock code fo

We have a long-standing ActiveSync device policy that requires an unlock code for all phones that use corporate email. It seems that iPhones with "swipe to unlock" and Android pho…

We have a lot of processes which send e-mails to our whole team on completion. T

We have a lot of processes which send e-mails to our whole team on completion. The e-mails include the completion status (error, success, warning), runtime, and any relevant infor…

We have a mixture of 10%mol acetone (1) and 90%mol chloroform (2) at 1.0 atm and

We have a mixture of 10%mol acetone (1) and 90%mol chloroform (2) at 1.0 atm and 50 C. We heat the mixture to 63 C. What are the partition coefficients K1 = y1 / X1 and K2 = y2 / …

We have a multilingual website in which a bug was discovered some days ago. It w

We have a multilingual website in which a bug was discovered some days ago. It was displaying other language data in other language and also the mixture of data like English langu…

We have a new developer on our team. He seems to be a smart guy (he just came in

We have a new developer on our team. He seems to be a smart guy (he just came in so I cannot really judge). He started with implementing some small enhancements on the project (MV…

We have a not for profit curriculum that a few schools are starting to use for t

We have a not for profit curriculum that a few schools are starting to use for their students. We need a website that will enable teachers to download the course materials, share …

We have a polyethylene (C_2H_4) sample containing 4,000 chains with molecular we

We have a polyethylene (C_2H_4) sample containing 4,000 chains with molecular weights between 0 g/mol and 5,000 g/mol, 8,000 chains with molecular weights between 5,000 g/mol and …