Homework Help

Hi Would anybody please help me answer in a paragraph or so "What StarDust is?" I don't mean the spaceship, or any business. Your help is appreciated

I dont fully understand the question, and it doesnt seem to be in the book

Essay Topic Please Give me an Answer Many economic commentators have describe the Current Account Deficit as being one of the most pressing problems the Australian Economy. What is the Current Account Deficit? Does it really matter? Australia also has a large Foreign Debt. What is it and does it matter? Please guys answer for me this question for my essay I really need an answer SO BADly, With my appreciation, Wassouf

I have tried to do this question serveral times but i dont seem to get the right answer...any help will be appreciated. ...BTW my chemistry teacher thinks its a hard question. If petrol sells 80 cents per litre, what would the price of LPG needed to be for it to have an equivalent price in cents per kilojoule as petrol? petrol heat of combustion:5460 kj/mol LPG heat of combustion 2220 kj/mol

I am doing a project on the advantages and disadvantages of adrenaline, and cant find much info, so could you please post some links or some info for me

hey'all in the vague hope someone might be able to answer this.. *fingers crossed* in routine antenatal antibody screen, is it possible to test for anti-A and anti-B as well as the minor significant antibodies (i.e. Rh(D), K, Fya etc)? It seems obvious you'd do a Coombs test with patient serum and known red cells, but i'd like to know if you can differentiate between IgG and IgM anti-A/B antibodies. (Or is that already inherent in the indirect Coombs method? because you add anti-human IgG? a bit confused here...) It's because i'd like to know whether or not you can tell early on that a type-O mother will develop IgG antibodies that have the potential to cause HD…

Just out of interest, what do you medical type fellows do with your summer? I have a theory they encourage you to work in the medical feilds during summer, hematology labs and so on. Sayonara³ thinks you try and drink enough to forget everything you learnt last term, and return to school in the fall smelling of vomit.

i have done everything i can think of to get the answer to this but i cant seem to get it right! i must be doing something wrong! Any help with be greatly appreciated! Question 6. Calculate the concentration of hydrogen peroxide in the 10 mL aliquot, taken from the reaction if the titration with 0.0168 M permanganate solution requires 24.8 mL to reach the end-point

I'm in a quandry with a DNA sequence. I have a polypeptide that starts with the MET codon and am putting a T on the front - which in effect makes the beginning codon Thymine - and then if I start reading the codons from the Thymine it changes the whole polypeptide's sequence (resulting in there being no methionine amino acid) so does this make the polypeptide a mutant or something else? Or do I "ignore" the T as 3 of the bases still give me the MET and as Met is the codon for initiating the translation of the polypeptide? Then back to the original sequence (starting with methionine again) and have to take out the 10th base, my original sequence is AUG UUU GC…

I have a boron atom that has been ionized as several electrons have been removed and so it is now a hydrogen like boron ion. So does this mean that my boron atom that has 5 electrons has lost 1 to the hydrogen or has it lost 4 so it ends up with just 1 (ie hydrogen having just 1 electron)? I'm getting myself confused with how many it loses. For the moment I'm going with that it loses just one and I think then that the symbol for it being a boron ion should be B4+ion ? (that is a superscript 4 by the way). Have I got the knack or lost the plot? If anyone can explain this process in layman English....

I have to write about enzyme structure and how their structure allows them to fulfil their biological role. Does anyone know any good websites as while I am reading my text book it is interesting to read but I want more information rather than just an odd paragraph! TIA

Ive been through a year and a half of college, but had to drop out due to personal problems. Im a long way off from being able to go back and i want to educate myself. Im looking for good sites that are about anything in Physics and Astronomy, or a mixture such as astrophysics. Im looking for a site that is pretty much for educational purposes. Maybe something set up like a textbook or encyclopedia. Any help would be greatly appreciated. The books at the local library arent very good.

What happens to NAD.2H produced during glycolysis in an animal cell respiring anaerobically

Does anyone know how to work out how many quantum states a hydrogen-like Boron ion has ?

I am really struggling with an assignment. To most it may seem simple (so HELP!!!!) but as a maths major I cannot for the life of me remember my high school chemistry. Q: At 25degC. 0.212g of barium hydroxide is dissolved completely in sufficient water to make 0.25 litre of final solution. What is the hydroxide ion concentration and the hyrogen ion concentration (in mol-1 litre) in this solution? Please can someone help. I really do not want to flunk any of my assignments and am really struggling with this one.

Please help if you can. I've read and re-read thru instructions for doing this equation, but I'm still stumped:( At 25 degreesC 0.212g of Barium Hydroxide Ba(OH)2 is dissolved completely in sufficient water to make .25 litres of final solution. I need to find the hydroxide ion and hydrogen ion concentrations. So far I have come up with... molar mass of Ba(OH)2 = 171.02 .212/171.02 = 0.00124 mol/ .25 litre =.00496 mol/ litre so the Hydroxide (OH-) Right? should be .006232 but this is more than the whole amount, so how is it possible? And since Hydrogen ion is supposed to make up the rest of it, it would have to be a negative amount and...well...you see my pr…

I'm doing a balanced chemical equation for the reaction that occurs when solid barium hydroxide dissolves in water. Have I done this right (sorry not yet got to grips with the subscripts so saying subn when I need to!) Ba(OH)sub2 --> Ba2OHsub2 If I have gone the wrong way can someone direct me where I have gone wrong so I can understand what I am not doing. Thank you

Is limewater a compound or mixture? Is hydrogen chloride added water is mixture?

Why do ball pens stop working after dropping onto the ground? I just want to ask for some advice in order to repair mine

How does hydrogen ion gain an electron during electrolysis(when NaCl in water)? Is that the electron is from chloride ion and passing through the carbon electrode and combine with hydrogen ion?

Hi Please could anyone advise the best way to show 7 successions of alpha decay on: 234 U 92 I know the answer is 206 Hg 80 Should I show it as 7 different stages eg. stage 1 234 230 4 U ---- Th + He 92 90 2 Stage 2 230 226 4 Th ------ Ra + He 90 88 2 etc …

Me again! Does anyone know where I can find some more info on beta-minus decay. I have a 11 over 4 Be atom and and have to write an equation for the beta-minus decay of it and show symbols for the boron isotope that is produced and for the other particles that are emitted. Want to do this one by myself but it is still a bit of gobbledegook to me - more of what symbols - 11 over 4Be then an arrow then

In this piece of homework I am asked to describe the process I would use to prepare a sample of dry hydrogen selenide. I am given serveral materials to do so : Liquids : concentrated nitric ccid concentrated hydrochloric acid water Solids : calcium chloride granules sodium chloride aluminium selenide sodium hydroxide Solid aluminium selenide will react with water to form solid aluminium hydroxide [Al(OH)3] and hydrogen selenide gas (H2Se). I need to isolate and dry the hydrogen selenide gas (which is denser than air). How would I do this? EDIT : After some thought, I've considered this : I'll use two addition funnels, the top …

This problem seems really easy (and probably is) but I am troubled by it for some reason. I can't remember it exactly because it was on a test in my high school chem. class today. What is the pH of a solution that has 12.00 g Na(OH)2 and 250.0 mL H2O?

I'm taking the NY biology regents tomorrow, and have a problem. Our teacher never told us the state labs would be tested on this regents, and I did not hold on to any of them other than the one with pulse rate. Mainly, I'm worried about the one with the red onion cells. By any chance, is anyone else taking the regents tomorrow, and could provide a summary of information they found important in the NYS required labs? Thanks!