Homework Help

Since Joseph Louis Gay-Lussac researched and analyzed the physical properties of different gases what would his field of study be called. For example: Bacteriologist within the field of biology.

"When propene is treated with HCl in ethanol, one of the products of the reaction is ethyl isopropyl ether. Write a reasonable mechanism showing how this product forms. For each step of the mechanism, use curved arrows to show the direction that an electron pair moves when a bond is made or broken." Here's the reaction that I sketched out. It looks ok to me, but if someone could double check it for me I'd sincerely appreciate it! Just wanna make sure I got each subsequent transfer of electrons/breaking of bonds correct. Thanks!

I am asked to predict product(s) of the SN1 reaction below and label the major (most stable) product if applicable. Should I be drawing more than one conformation of that product? Ex. a conformation that has the isobutyl group in the axial position, since there could be more than one 1,4-cis conformation? Any help sincerely appreciated, thanks!!

I have received a science assessment where I am to perform my own investigation and to present my findings in a report. Before I can conduct my experiment I must complete a proposal. My aim is to determine what substance is best for removing tarnish from silver. I am having some troubles with answering and finding answers to these two particular questions. 1. "Identify scientific concepts involved in your investigation." 2. "Identify any previous research done by other scientists on your investigation" It would mean a lot to me if someone could help me with these two questions.

Naphthalene, a substance present in some mothballs, has an enthalpy of vaporization of 49.4kl/mol. If the vapor pressure of naphthalene is .300mmhg at 298K, what is the temp at which the vapor pressure is 7.6x10^2mmhg?

So our instructor posed this question to use at the beginning of the year. What would happen if you where to drill a hole straight through the center of the Earth and jump in (all technicalities aside including air resistance). Well just thinking about the problem I think that you you would make it to the exact other side of the Earth because gravity would be decelerating you for the same amount of time as it would be accelerating you. But I want to be able to show this mathematically. So I have came up with this. I would appreciate if people would say if this is right and if it is wrong could you point me in the right direction. V=[math]\sqrt{2GH}[/math] Yo…

1. If you drop a bullet off a table 3 feet high, and fire another one straight across an empty football field, which will hit the ground first? 2. A ball rolls down a spiral track. The end of the track curves left. What path will the ball take when it leaves the track? 3. A wooden cube is 1 inch long on each side. How many cubes will you need to form a cube which is 2 inches along each side?

i am trying to determine if it is better to have laminar or turbalent flow for my problem. i have a hot material (nylon 6) that needs to be cooled. so i will have a jacketed wall (heat exchange plate) that will have water running through it. should i use dimensions that will result in laminar or turbalent flow? also, i am having trouble finding a simple equation to use that involves laminar flow. thanx!

(see attachment) here is my problem i know the delta temperature i want my nylon to be. with that i can solve for a multitude of things. to start off, this will give me my heat that is required to leave the nylon. however, something went wrong. i am attempting to cool nylon, through stainless steel, and with flowly water on the other side in a series of heat exchange plates. the last part of the attachment shows that when two different calculations are taken place, a different number results (not good). as well as my Nusselt number is way too low. it should be a min of 100. any help would be greatly appreciated on what i did wrong?! heat_transfer2…

[math]x[/math] , [math]y[/math],[math]z[/math] non negative reals number and [math]x+y+z=1[/math] . prove that [math]0 \le xy+yz+zx-2xyz \le \frac{7}{27}[/math]

I know an enantiomer is simply a non-superimposable mirror image of a compound containing at least one stereogenic carbon, but for the life of me I can't figure this one out! Help would be sincerely appreciated, thanks!! (Please excuse my terrible drawings of the dashed lines.)

My instructor gave me some problems to help study for the quiz on Monday, but i have no idea how to go about solving them.. 1) In martians, Gene 1 is determining eye shape (A-star eyes; a- square eyes) and Gene 2 is coding for presence or absence of tail hairs (B-hairy tail; b-smooth tail). True- breed star eyed individual with smooth tail marries another true-breed square-eyed individual with hairy tail and all of their childred have star eyes and hairy tailes. If mendelian Genetics works on Mars, a) which allele of each gene is dominiant, and which is recessive? Would the dominant ones be A,B, and the recessive a,b b) What are the genotype of the paren…

Can anyone help me?! I want to know, *The IgG2b Isotype indicate to what type of immune response? *TH1 type immune response or TH2 type immune response? I know that IL-4 associated with TH2 antibody response. and induces the change from IgM to IgG1 and IgE in the B lymphocyte , IFN- γ associated with TH1 cell mediated immune response and induces the change from IgM to IgG2a All i found about IgG2b was that TGF-31 is a switch factor for the murine IgG2b subclass for appropriately activated B cells

can someone help me out in naming these compounds PhCH2Ch2C(-N-NH-Ph)Ph and CH3CH2CH2CHOHCH(CH2CH3)2

In the formula Q=cmΔT, in which Q is the change in energy, c is the specific heat, m is the mass, and ΔT is the change in temperature, what does mΔT give you? Does it give you the amount of heat? Energy perhaps? Thanks, would be a great help if you could answer.

:eek:What type of chemical reaction is it when Manganese Dioxide is added to hydrogen peroxide? and the products are oxygen and water. and manganese is a catalyst? I really need an answer!!!:confused: Come On People! Someone Must Have Some Idea!

been working on a physics experiment. The following are the only supplies allowed: 8 sheets of regular paper Elmers white glue Objective: Construct 8.5 inch tall structure that a 12 ounce soda can can easily fit inside and be removed with no obstructions. Has to be able to support 30 - 50 pounds.

i am stuck on this question and for the life of me i cant figure out how they got the answer!? here are the details i have Preparation of a diluted soultion of household ammonia in which 20.00ml of household ammonia is diluted to 100.0ml dilution 5:1 Titrating the diulted ammonia with the standardised hydrochloric acid solution. in this step 20.00ml aliquots of dilute ammonia required 24.5l ml of hydrochloric acid for equivalence n(NH3) in 20 ml =1.177 x 10-2 mol The percentage of ammonia NH3(aq) is household ammonia. Take the density of the household ammonia to be 1.08g mL-1.. the answer is 4.46% However when you use the %= solute/ solution doesn't g…

in this question Kb=4.37*10^-4 and the Molarity=.458

Two friends Jane and Mary often do their shopping on Saturday afternoons. If Mary goes shopping, the probability that Jane also goes is 0.96. If Jane goes, the probability that Mary also goes is 0.8. The probability that neither goes is 0.07. Find the probability that both go shopping. How do I approach the question? I tried to do conditional probability by doing all the fractions with eg. R(Jane goes intersect Mary goes)/P(Mary goes) = 0.96 and a couple of these but didn't really work.

Hi, this is not really a homework question, since I don't understand it at all, I can't really do my homework. And I am having a test on thursday on this... Anyway, I am learning Double Source Interference / Single Source Double Slit Interference in Physics. I understand how some of the node minima, waves are canceled out, and the maxima, wave construct. But I don't get the calculation part of it. All those equations and drawing of triangles. It look really confusing to me, and I don't quite understand it, beside that if a point is equal distance from both sources, then the wave will arrive at the same time. Different distance they don't match or something. …

Hey, I was wondering if there is a way to solve enyme kinetics problems without drawing a graph? The question that I am trying to answer doesn't specify that a graph has to be drawn. The table i have been given has 5 substrate concentrations of each experiment and the velocities of each reaction: one with inhibitor 1, one with inhibitor 2 and one without inhibitor added. I must find the Km and Vmax for the absence of inhibitor, presence of inhibitor 1 and presence of inhibitor 2. Any help that you could give me with this question would be very helpful. I am clueless when it comes to this subject. Thanks XX

Answer as many as you can if you know any! Thanks in advance! 3. In crayfish their stomach is lined with endoderm; however, their esophagus and intestine with an exoskeleton. What problem will this give the crayfish upon molting time? 5. Why is it necessary for Annelids to have very developed nervous systems; even more so than round and flat worms? 8. Describe the earthworm's primitive heart.

Im currently doing some teach-yourself-maths in preperation for exams in June and am on the last chapter, Group theory, which I seem to be struggling with. Here's the question im stuck with; "G is a group and D(G) is the set of ordered pairs of elements (g,e) where is an element of G and e = +/- 1. Show that d(G) together with the binary operation (g,e) @ (h,d) = (gh^e,ed) is a group if and only if G is Abelian ((h,d) denotes another element of D(G))" (@ is a general binary operation) Unfortunately the example in the book was not particularly helpful so I have no real idea how to tackle this. What I do know; The 4 axioms- closed, associativity, identity…

Hey there everyone. My Chemistry grade is not so hot right now, and this test basically decides my final grade. ^^; So I really want to get it right, so if you could help me out a little, it would be greatly appriciated. So, here's the thing: I got very sick last week and missed four classes. This means I missed almost all of the lessons for thermochem. Because of this, I have no clue what I'm doing. My current and biggest issue is something about Hess's Law. Anyone think they can help me with it? Mainly, I don't know how I'm allowed to cancle things out and how I'm not allowed to. If someone could explain that to me, or if I could just enter in my problem an…