Questions Asked on
April 25, 2007

Statistics
Biologists studying the healing of skin wounds measured the rate at which new cells closed a razor cut made in the skin of an anesthetized newt. Here are data from 18 newts, measured in micrometers per hour:
asked by Natasha 
Chemistry II
A 12.00 mL sample of sulfuric acid from an automobile battery requires 34.62 mL of 2.42 M sodium hydroxide solution for complete neutralization. What is the molarity of the sulfuric acid? H2SO4 + 2NaOH ==> Na2SO4 + 2H2O molarity NaOH x liters NaOH = mols
asked by Jayd 
Chemistry II
What volume of .0500 M calcium hydroxide is required to neutralize 38.50 mL of .0400 M nitric acid? 1. Write the equation. 2. M HNO3 x L HNO3 = mols HNO3. 3. Use the equation to convert mols HNO3 to mols Ca(OH)2. 4. Now use M x L = mols to calculate volume
asked by Jayd 
Physics. Urgent help!!
The relative humidity is 55% on a day when the temperature is 30.0°C. Using the graph below, determine the number of moles of water vapor per cubic meter of air. on the graph, Vapor pressure of water is on the yaxis and temperature on the xaxis 30C
asked by Papito 
science
Br2+AlI3 The Bromine will replace the Iodine in the Alumninum Iodide (AlI3), leading to I2 and AlBr3 as products. See if you can balance the reaction.
asked by lady 
Chemistry II
If 36.0 mL of 7.0e4 M HClO4 is added to 19.5 mL of 8.2e4 M LiOH, what is the pH of the solution? Write the equation. Calculate mols HCLO4. Calculate mols LiOH. Determine how much of which reagent remains after the reaction. pH = log(H^+) post your work
asked by Jayd 
science
sorry to annoy anyone, but WHAT is the big idea of energy? i would really appreiciate a response In what context? Too much use. Not reneewable? Cost? availability? in the context of an ironsulphide reaction I still don't understand the question. explaining
asked by Fiona 
Chemistry II
What volume of .0500 M Ba(OH)2 will react completely with 21.00 mL of .500 M HCl? Same type problem. Post your work if you get stuck. 2HCl + Ba(OH)2 > 2HOH + BaCl2 (.0500 mol HCl / 1000 mL) (21.00 mL) (1 mol Ba(OH)2 / 2 mol HCl) (1000 mL / .0500 mol
asked by Jayd 
Chemistry
Mass of an aspirin tablet is 0.42g and contains 77.38% ASA by mass. I dissolved the tablet in hot naOH and cooled the solution with distilled water to the mark of 250 volumetric flask. Then I pipetted 5.0 mL of the solution to the 100 mL volumetric flask
asked by Brissa 
math
how do you convert 12.55 to percent? i get 1,255% is that correct? or should it be 125.5%? If the 12.55 is a decimal, then .1255 is the percent. Per Cent means "per 100". the math problem asked me to find the percent increase of the population in africa
asked by Dena 
biology
What are the 5 types of neuroglia cells and their functions? Actually, I count six macrogilia types. http://en.wikipedia.org/wiki/Glial_cell
asked by shea 
chemistry
How would you prepare 2.5 L of a 0.05 M solution of iron (III) chloride using iron (III) chloride hexahydrate? Would you use the eqn, Cinit x Vinit = Cfinal x Vfinal So I have Cfinal and Vfinal... now what? from 2.5 L of 0.05 M, how many of moles iron
asked by Brissa 
sentence
The United States is not a democracy, it is a Republic. The United States is a democracy because the people elect its leaders. democracy Can someone help me understand how to use this word in a sentence? Correction of the runon (comma splice): ...
asked by Ralph 
Physics urgent help needed
The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 2.5 105 Pa, and the horizontal divisions represent 1.0 103 m3. Determine the work done (including algebraic sign) in each segment
asked by Papito 
ap us gov and politics
Political institutions can present both obstacles and opportunities to racial minority groups in their efforts to gain political influence. (a) Identify one feature of one of the following and explain how that feature has presented obstacles to racial
asked by janis 
US Gov't
What are the provisions of the 25th Amendment? http://www.law.cornell.edu/constitution/constitution.amendmentxxv.html It refers to who would succeed whom in case of the removal, resignation, or death of the President. Let us know if you have further
asked by lauren 
Algebra1
how do i sove this problem 12q+4=8q6 12+4=8q6 First you want to get the variable isolated on one side. To do that, you can do one of two things. We'll put the variable on the right side. You need to put the 12q on the right. Do you know how to do
asked by Jessica Esquivel 
Science  geology
The age of a granite can be determined using radiometric dating. Explain the basis for a determination of a 238UPb radiometric date of 1120Ma for a granite.......HELP!!! hi sounds like you are on the same course as me i was stuck on this so give this a go
asked by Desmond 
math
tell how you did it thank you Write an equation using n and t. The total bill (t) was twenty times the number of people (n). t = 20n ? "was", "is", "will be" translates into math as "="
asked by halida 
Chemistry II
What volume of .100 M NaOH will react completely with 21.00 mL of .500 M HCl? Vb*ConcBase= Vacid*ConcAcid Solve for Vb. 21.00 mL x .500 M HCl = 1.05e1 1.05e1 / .100 M NaOH = 1.05e2 right.
asked by Jayd 
math
10 is what percent of 25? show work 10 = x/100 * 25 10= .01x*25 1 = .25 x multipy both sides by 4.
asked by alexllly 
Chemistry II
Hydrochloric acid (77.0 mL of .267 M) is added to 236.0 mL of .0730 M Ba(OH)2 solution. What is the concentration of the excess H+ or OH ions left in the solution? Done two of these. They are all alike. Use the template from the previous problem. Post
asked by Jayd 
math
12 1/3 + 7 7/15 switch fractions to improper fractions then find a common denominator to find improper fraction of 12 1/3 multiply whole number (12) by the denominator of the fraction (3) then add the numerator of the fraction (1) therefore improper
asked by Freddie 
Math
How do I do this?  can anyone give me a formula to find the answers? Example: Find the annual rate of simple interest~ P: 5000 / I: 650 / T: 3 years. PV = nRT I=PRT so solving for R we get R=I/(PT) plug in your values and evaluate. Your answer will be a
asked by Finding Interest Rate in Interest Problems 
Science
state the number of electrons either lost or gained in forming each ion. Br As3
asked by Kelly 
algbrea
3x5(3x7)= 2(x+9) + 45 3x15x+35= 2x+18 +45 12x + 35 = 2x+63 12x 28 = 2x 12 28 =x 40 =x 3x5(3x7)= 2(x+9) + 45 3x15x+35= 2x+18 +45 12x + 35 = 2x+63 10x+35=63 10x=28 x=2.8 you are both wrong! 3x  15x + 35 = 2x + 18 + 45 12x  2x = 63  35
asked by stumped 
ap us gov and politics
In the last half of the twentieth century, voter turnout in federal elections has declined. During the same period, voter turnout has been higher in presidential elections than in midterm elections. (a) Identify two factors that have contributed to the
asked by janis 
chemistry
Is 3:1:1 hexane/acetone/acetic acid a more polar or nonpolar solvent? more polar or nonpolar solvent than what? 3:1:1 hexane/acetone/acetic acid would be considered quite a polar solvent mix. But as DrBob says more polar than with what?
asked by sue 
Earth science
I would like to comfirm that the 4 cycles on Earth are: carbon, water and rock. I think the 4th one is the biosphere but am not sure as the biosphere contains all attributes necessary (including the atmosphere)for life to exist. Am I on the track? I do
asked by ruby 
CHEMISTRY
Cracking decane, under different conditions, produces two molecules. One of these molecules is ethene. What is the formula of the other product? Sugest a use for this product? Thanks ETH + OCT= DEC
asked by Jessica10 
Math
Quick question for yous: Does .9999 repeated = 1? yes? If the number is to be rounded, yes, it is 1 but if not, then the answer is 0.9999999999999999999999999999999999999999? depending upon the precision you are allowed to have with significant figures. I
asked by Smitty 
Finance
I need help with this finance homework question PLEASE! Any help greatly appreciated! Your firm has been presented a leasing alternative on a new pizza dough machine. The annual lease payments would be $135m. Tax rate is 40%. The lease is for ten years.
asked by Claire 
math
whatis 20% of 40? 20/100 * 40= .2*40 = ? what
asked by halida 
My Research Has Failed....
have made a grave mistake. My study of the “darkness of the heart” began with a simple psychological test and quickly snowballed. Spurred on by my youngest apprentice Ienzo, I constructed a massive laboratory in the basement of my castle. Unbeknownst
asked by Ansem 
algebra
Science and medicine. A bicyclist rode into the country for 5 h. In returning, her speed was 5 mi/h faster and the trip took 4 h. What was her speed each way? x for 5h x+ 5 miles for 4 hours 5x = 4 (x+ 5) 5x = 4x + 20 20 miles there 20 miles back x = 20
asked by stumped 
chem!!
what determines if the heat of solution is endothermic or exothermic for salts? Mostly the competition between the lattice energy (how much energy it takes to break the crystalline strucure) vs the heat of solvation of the ions.
asked by Anonymous 
math
2x1/9 > 1/3 add one ninth to each side, then divide by two.
asked by grandma bakes cookies 
Government essay help
I've written the essay but I had to use the quote and cite method rather than paraphrase and cite and I'm confused on how to cite my work. I got all of my information in chapter 9 section 1 of my textbook. You need to have the textbook cited in TWO places:
asked by Jon 
Algebra
Write the equation of the line satisfiying the givrn geometric conditions. L has yintercept (0, 2) and is perpendicular to the line with equation 2x3y=6 Here is my answer please check. 2/3x2 I can see it is wrong just by looking at the slope. The
asked by jessica 
English
Hello! i have to pick 3 news articles on a topic that i have chosen,and i have to write an essay to show "how these newspapers and or news magazines present representation of truth and reality designed to appeal to a particular audience.discuss, making
asked by Twinkle 
Ap Calculus
Ok, I've been doing BC review tests to prepare for the AP exam. I came across this free response problem and I have no idea how to do it, can someone please help me with this? It gives the differential equations: dP/dt = .03P(30P) and it asks "Find the
asked by Jessica 
science
steps to reduce the harmful effects of human activities on biogeochemical cycles? Pollution has to be controlled.
asked by pearl 
science
which businesses would changes impact the most from biogeochemical cycles? Businesses involved in their products: fertilizers, soil conditioners, soil bacteria, etc. Businesses related to enzyme reaction products: Sugar Syrup (from wood chips), medicines,
asked by pearl 
English
What genre does Robert Olen Butler write? Several genres, actually: http://en.wikipedia.org/wiki/Robert_Olen_Butler =)
asked by zulma 
algebra
write in simplest form 1/10 / 1/4 they way you typed the problem illustrates well why it is so important to use brackets to show the precise order of operation. I will assume you meant (1/10) ÷ (1/4), if so then it would be (1/10)(4/1) =2/5
asked by Tony 
Chemistry
This is about spectrometry. How would the presence of salicylic acid affect the results of the spectrophotometric determination of the purity of ASA? Why? I don't know how you conducted the experiment but I assume you measured a peak in the absorption
asked by Brissa 
ALGEBRA
Find all positive values for k for which each of the following can be factored. I have 2 problems i think i got the one right but not sure the second one i have no idea where to even start 2x^3+16x^240x=2x(x^2+8x20) (x2)(x+10)=8x this one i am stumped
asked by TAMMY 
English
Is the the we'll a Snynonym or a homomym? Please rephrase and proofread. Your question is not clear. Thanks. =) A synonym is a word that means the same thing as another word. ex. lawyer, attorney A homonym is a word which sounds the same another word, but
asked by Ashlee 
algebra
Find the value of x for the area of the triangle that is 12cm sq. The base is 2x+2 and the height is x. Solve this equation: (1/2)(base)(height) = (x+1)x = 12 x^2 + x 12 = 0 That equation is factorable. Take the positive root. (One of them will be
asked by Laura 
Finance
n
asked by Lauren 
loins
what websit has imformaton about lions Go to wikipedia and search for lions These sites have information about lions. (Broken Link Removed) http://nationalzoo.si.edu/Animals/GreatCats/lionfacts.cfm
asked by chloea 
social studies
what host city was located near mark twains story Which story? He wrote LOTS of them!! ??
asked by jessica 
english
what is a literary writer? Someone who writes literature? http://www.answers.com/literary Then comes the question of which works are considered literature and which are not. =)
asked by claudia 
essay help
Jon, this is exactly the site you need to check... http://owl.english.purdue.edu/owl/resource/557/03/ I don't have to have a works cited page and all of that good stuff. I don't have that many pages to work with my instruction is just to cite the sources
asked by GuruBlue 
Maths Help !!!!!!!!!!!!
Alec measures the length of a line accurately. His answer, correct to 1 decimal place , is 42.7 cm. What is the greatest line of the line I did not understand the last bit can someone help with it please thanx One decimal place is 0.1 cm. The true length
asked by GOODY 
Mathematics
Alec measures the length of a line accurately. His answer, correct to 1 decimal place , is 42.7 cm. What is the greatest line of the line I did not understand the last bit can someone help with it please thanx The greatest length? 42.74 cm
asked by Wales 
can someone edit my essay? thanks!
Gorbachev did not think about all the consequences that would happened if he changed Russia into perestroika. He underestimated the effect that perestroika would have on Russia. Yes, his political initiatives were great for freedom and democracy but all
asked by henrey 
Math/ Science
If you squeezed all the air in a large living room into a small, lightweight box, you would have a hard time trying to lift it true or false Hints Volume of room is 125 meters 2.2 pounds per meter 8x10 box I think this is true because you have alot more
asked by Missy 
Algerbra 1
The Quotient of 6 times a number and 16 ? "Quotient" is what we call the result of a division, the result of multiplication is called a product. You used the word "times" which shows multiplication. BTW, I refuse to tell you what 6 times 16 is.
asked by brian 
Global
made peace with PLO; shot by fellow Jew? who was that Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this specialty online
asked by Katie 
Global
Has a monoploy on oil Your question is not specific enough to be clear as to what information you desire. Since this is not my area of expertise, I searched Google under the key words "oil monopoly" to get these possible sources:
asked by Katie 
math
what is 120% of 40? show work or tell how you did it I laid out the others, you try this one, and I will critique your work.
asked by alexllly 
math
tell how you did it thank you Write an equation using n and t. The total bill (t) was twenty times the number of people (n). t=20n t total bill was equals 20t 20 times number of people some purists will insist on writing it 20n = t either way is correct
asked by school girl 
Buddha
I want to learn about BUDDHA Go for it. The internet is a great source of information. You could also do it the oldfashioned way and get a few books on the topic. Here are several sites that will give you information on this topic.
asked by Tyler 
science
what businesses would be affected if biogeochemical cycles change.?
asked by pearl 
ScIeNcE
My teacher is having us do old Living Environment exams as practice for the Regents in June. We have to do them for homework, and I'm stuck on this one: A rock sample containing cementing material, shell fragment, Feldspar fragment, and Quartz fragment
asked by brie 
science
hi, could any1 tell me in basic words on "the environment and process of formation of schist and sandstone?? Since this is not my area of expertise, I searched Google under the key words "'formation process' schist sandstone" to get these possible sources:
asked by k 
microeconomics
what is fiscal policy In general, fiscal policy is what the government does with respect to spending and taxes.
asked by brittany 
science
name each ion 1. As3 2. Ca2+ 3. H Since this is not my area of expertise, I searched Google under the key words "H ion", As3 ion" (Sure you don't mean "+"?) and Ca2+ ion" to get these possible sources: http://www.hminusion.org/
asked by Kathleen 
english (red sky at morning)
what does the allusion "knees that launched a thousand ships" refer to? Here is the background of the original phrase: http://www.phrases.org.uk/meanings/359800.html What you quoted is alluding to this in some way. Helen of Troy, the most beautiful woman
asked by lily 
math
a rectangular plot of land has an area of 1050 m squared. its length exceeds its width by 5 m. find the length of the plot. i got x(x+5) is tha right? Area is LW, and in this case (w+5)w In your rendition, x is width. Add five to get length when you solve.
asked by ineedhelp 
math
a rectangular plot of land has an area of 1050meters squared. its length exceeds its width by 5 meters. find the length of the plot. let the width be x m then the length is x+5 m so x(x+5) = 1050 now you solve it and let me know what you got.
asked by anonymous 
French. Please edit this for me.
This is the english version: She targets men. She gives them the kiss of death. Her favourite targets are lying, cheating boyfriends and husbands The french translation I got online is: Elle cible des hommes. Elle leur donne le baiser de mort. Ses cibles
asked by Kim 
Math/ Science
If you squeezed all the air in a large living room into a small, lightweight box, you would have a hard time trying to lift it true or false Hints Volume of room is 125 meters 2.2 pounds per meter 8x10 box I think this is true because you have alot more
asked by Missy 
Science
Does air have mass? I think it does because air takes up space so it is matter and matter has mass. right you are. To weigh it is a bit tricky. One way is to compress it.
asked by Missy 
math
how many foot are in 41/2 4 1/2 of what? miles? yards?
asked by somadina