Homework Help
For assistance with (but not answers to) homework problems.
A simple reminder to all: this is the "Homework Help" forum, not the "Homework Answers" forum. We will not do your work for you, only point you in the right direction. Posts that do give the answers may be removed.
5184 topics in this forum
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Where do you begin to draw a Bohr model for hydrogen sulphite? How? What is it supposed to look like? Could someone give me an example of another ion too? I would really appreciate it. Thank you so much!
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I am an MA student at City Uni in London UK. I am writing a novel on the Creative Writing course there, and I have a character of a chemist creating novel compounds that he is ingesting to find God. It is crucial that my *fake* molecules at least add up in terms of how they would join together etc. and react together. I am looking for someone with creative chemistry skills willing to exchange a few emails with me on these fantasy compounds and help me draw realistic molecule diagrams. I think I need to make about four of them. I am NOT interested in these being viable, but we would have to use some real building blocks in the process. You can check with my programme head …
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Hi. I'm doing a chemistry assignment in which I'm having difficulties. I am on a open university course (Environmental Sciences, first year) and never had chemistry in high-school (coming from the services area), therefore I need some assistance. Whatever help i get is welcomed. This is it: A solution of 100 cm3 of acetic acid (CH3COOH) with a concentration of 0.2 mol / L was titrated with aqueous sodium hydroxide solution (NaOH) at a concentration of 0.1 mol / L. a) Write the chemical reaction that translates the titration. b) What is the pH of the solution after adding 30mL of NaOH c) In a titration what is the meaning of the expression "point of equivalence"?…
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I just don't understand this. What's the process to get these answers? I tried the same process as with closed interval but I was wrong. Why none, none, none, none? I'm stuck. Show me how you would do it, or any other example you put to help me understand. Any help is welcome, thank you for your answers. (EXAMPLE 2, (b)).
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Hi, im a student, and i need to conduct a research on anything chemistry related. i am interested in electrochemistry, so i thought of doing the affects of different currents to the electrolysis of copper sulphate solution. however, my teacher thought that it was too simple and i should find maybe something that i can extract copper sulphate from to get marks on the personal engagement part. do anyone have any ideas on how i can make this experiment 'a lil bit complex'? or do you have any ideas for my chemistry research relating to chemistry? thank you so much
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As a student of psychology, why we study sociology? I recently started my university life and my major is psychology..so it would be better if someone could elaborate it..
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Hi, why the probability is not calculated using same function complex conjugate Like in the equation at the bottom of this paper?
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Let f(w) = 2w^3 - 5. What is f(4)? Let f(w) = 2w^3 - 5. Let z = 2. What is f(z)? Let g(x) = cos(x/2) - 3x. Let f(x) = 2x + 5. What is g(f(x))? Let f(x) = tan(x) - 2/x. Let g(x) = x^2 + 8. What is f(x)*g(y)? What is the derivative of x^2 - x + 3 at the point x = 5? What is the value of x where x^2 - x + 3 is a minimum? In Python, what is returned when evaluating [n for n in range(10) if n % 2]? In Python, what kind of error is returned by the following code? (e.g. NameError, ValueError, IOError, etc.) def my_func(n1, n2): return n1 + n2 my_func(1, 2, 3) What is returned by datetime(1970, 1, 1).strftime('%Y-%d-%B') in Python?
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Guys can someone put me in right direction? I don't understand this task. Help pls.
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Consider a turbine which actuates the windmills by blowing air into it. (If we use beat steady windmills (which is called reverse windmills) instead of movable windmills, deliberate the following conditions by parametric view. (Ignore the friction power (force)) A. Compare moving speed of air molecules in the following conditions: 1. There are reversed steady windmills between movable windmills. 2. There are movable reversed windmills in the middle of movable windmills which are actuated by wind power (energy).
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I could not solve by softwares. Can you help me?
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I have an assignment to record a model that I have to create and explain the tectonic supercycle step by step, any model suggestions? Thanks
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So, basically I am extremely confused by some of my chemistry homework. The question is: "hypothetically, you have an unknown solution that contains either dissolved NaCl or dissolved NaNO3. You add AgNO3 to the unknown solution and observe that a precipitate forms. Identify the unknown solution and explain your choice (use the solubility rules)." I'm confused because wouldn't both NaCl + AgNO3 and NaNO3 + AgNO3 create a precipitate? Couldn't the unknown solution technically be both options? I'm so confused.
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I am looking for information on the plastic crisis and the oceans. Can anyone point me in the direction of a place with reputable sources? I feel as though Google Scholar hasn't served me well in the past. Also does anyone know anything about the impacts that cruise ships have on the ocean? Thank you.
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SO, just in general, I'm having difficulty telling the difference between chromosomes, chromatids, sister chromatids, Homologous pairs, n and 2n. But I would really appreciate it if someone could explain how to get the answer for the question below. My initial thought was that there would still be 20... but the back of the book said that was wrong. It was a MC with none of the above as the answer so I was thoroughly confused. If a diploid cell with 20 homologous pairs completed meiosis and cytokinesis, each cell formed would contain _____ homologous pairs. Oh I was thinking of mitosis, whoops, would the answer be 0? I got that from looking at an example problem…
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How many unique DNA and RNA nucleotides are found in Nature - My initial thought was 5; Cytosine, Thymine, Adenine, Uracil, and Guanine. But the key says I'm wrong, I'm hoping this is a typo?
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Just recently took a quiz and one of the problems that got to me was this The following are involved in reactions that produce halides from secondary alcohol substrates , EXCEPT: pyridine PBr3 SOCl2 HBr I got the problem wrong but was wondering what is the true answer.......
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ill cut to the chase. how many watts can 50,000 rpm if hooked to a dynamo or a motor/generator?? what is the cheapest electricity frequency changer I can buy why do I need an amplifier when doing coil stuff in a coil, where do I plug in the 2 ends of the coil, my uncle said its line 1 and line 2. is it equivalent to positive and negative sides of a battery???
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ive been tasked to make a short essay and your comments are necessary, 5 comments atleast. Please don't complain about my essay since im not really good at this, just comment about your thaughts on the subject, and pls no negative comments. comment, or reaction will do. Inquiry Based Learning Inquisitive based learning is a way of obtaining information by asking various questions about the things you are curious about. Inquisitive learning is an excellent way to learn as it motivates curiosity which leads to more questions. Inquisitive learning also elevates thinking from low-order to higher-order thinking which benefits us as time goes on beca…
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Ok so here recently I’ve been experiencing like a slight numbness but more of a tingling type feeling in my arms and legs. I’m only 20 6’6 200 lb’s exercise every now and then pretty fit. Not diabetic or anything like that pretty healthy..so far. Now I did try to look up the symptoms and the closest thing I could find that matched it was anxiety,the only thing that didn’t match there was Nasuea. It’s been going on for a few days now and I’m starting to get very worried it could be something serious. Could anyone help and give me some type of reasoning why it’s continuing?
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I was given an assignment where I have to look at a picture of a cell and identify the parts selected. I am only missing one part unidentified and I can't research it online. All the parts that need to be identified have letters associated with it. I can't find what part "F" is.
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I currently have a question sheet of biochemical statistics that I'm trying to work through. I would very much love any hints or examples of what to do for this question. I really don't know what to do, or where to begin! The reduction of a ferredoxin with ditionite (under anaerobic conditions), gave the spectra 'a' to 'h' as shown in the figure below: http://yfrog.com/0yimg28880j Spectrum 'a' represents a fully oxidised state and 'h' shows a fully reduced state. Spectra b-g represent partially and increasingly reduced ferredoxin. The volume was constant throughout the experiment and the changes in absorbance at 460 nm were linear with regard to the state …
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I tried to solve this differential equation by converting into an exact differential equation.So I converted into an exact differential equation but couldn't reach the end.so help please.
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The problem statement and diagram is attached. Write a MATLAB code for the mechanism that uses phi at the independent variable and solve for the following parameters when phi=30°, 150°, 260°, and 310°. a. Angular velocity of link 3b. Angular acceleration of link 3c. Linear velocity of point Ed. Linear acceleration of point Ee. Motor torque with external force, FeI don't necessarily need the MATLAB code, as I can figure that out. My trouble lies within figuring out the Kinematic Equations. Would I need to figure out a system of equations (ex. 5 equations, 5 unknowns) or could they all be solved for independently? I'm pretty sure that the 'syms' function in…
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