Questions Asked on
April 29, 2007

balanced equation
? MnO4– + ?H+ + ?C2O42– > ?Mn2+ + ?H2O + ?CO2 what's the balanced equation? correct coefficients? is it 1MnO4 + 2H+ + 1C2O42 > 1Mn2+ + 1H20 + 2CO2 ? c2042..? are you missing parenthesis somewhere? oh i see, no i believe this is correct: MnO4 +
asked by christine 
chemistry
Write a net ionic equation for the reaction of the aqueous species ammonia and hydrofluoric acid. I don't think mine is coming out right I don't know how NH3 reacts with other species, because I end up getting hydrogen as both an anion and a cation in the
asked by Christine 
Math (Statistics)
How do I go about tackling this problem? The American Medical Association wishes to determine the percentage of obstetricians who are considering leaving the profession becaose of the rapidly increasing number of lawsuits against obstetricians. How large a
asked by Edward 
chemistry
why would lowering the temp and decreasing the pressure not increase the rate of the reaction: carbon monoxide gas is combusted in the presence of oxygen gas into carbon dioxide. (DeltaH for this reaction is 285kJ.) CO + O2 ==> CO2 + heat decreasing P
asked by alexa 
history
Why did Massachusetts Federalists support Republican Aaron Burr for governor of N.Y in the 1804 election? Please tell us your answer  and we can discuss it. Because he had power bECAUSE HE HAD pOWER???
asked by Mack 
physics
A tube is open only at one end. A certain harmonic produced by the tube has a frequency of 445.0 Hz. The next higher harmonic has a frequency of 525.9 Hz. The speed of sound in air is 343 m/s. (a) What is the integer n that describes the harmonic whose
asked by Cavin 
history
How did the Louisiana Purchase affect the size of the U.S? Look at a map of the purchase; then look at the number of square miles that was added and the number of states that were made out of the purchase. so it shortening it? """"so it got
asked by Mack 
physics
Speakers A and B are vibrating in phase. They are directly facing each other, are 7.4 m apart, and are each playing a 72.0 Hz tone. The speed of sound is 343 m/s. On the line between the speakers there are three points where constructive interference
asked by Coreen 
chemistry
sulfur trioxide gas dissociates into sulfer dioxide gas and oxygen gas at 1250 degrees C. In an experiment, 3.6 moles of sulfur trioxide were placed into an evacuated 3.0L flask. THe concentration of sulfur dioxide gas measured at equilibrium was found to
asked by alexa 
MATH
WRITE THE GREATEST POSSIBLE ERROR FOR EACH MEASUREMENT. 43mL I don't understand the question It depends on the graduations. I assume on this beaker you have 40ml, 50 ml marks. So the 3 is an estimated digit. A safe assumption is +.5ml error.
asked by SANDRA 
chemistry
A buffer is prepared by dissolving .0250 mol of sodium nitrite, NaNO2, in 250.0 mL of .0410 M nitrous acid, HNO2. Assume no volume change after HNO2 is dissolved. Calculate the pH of this buffer. My book does a poor job of explaining buffers and I'm really
asked by Simpson 
math
The volume of a larger prism is 168 cubic cm. if the prisms are similar with a linear ratio of 3:2 what is the volume of the smaller prism? How do i figure that out? Did you learn that the volumes of similar objects are proportional to the cubes of their
asked by emily 
physics
Describe the energy conversions that occur in each of the following devices: a. an incandescent lightbulb b. a clothes dryer c. a digital clock radio We will be happy to critique your thinking. Heat is produced in all, and some light is produced in two.
asked by Ron 
chemistry
unknown element X combines with oxygen to form the compund XO2. If 44.0 grams of element X combines with 8.00 grams of oxygen, what is the atomic mass of element X? X + O2 ==> XO2 8.00 g x (1 mol O2/32 g O2) = 0.25 mol O2. 44.0 g element X must represent
asked by alexa 
Chem 2
for the evaporation of water during perspiration on a hot dry day 1.delta H is greater than zero and Tdelta S is equal to Delta H 2.delta H is greater than zero and Tdelta S is gretaer than Delta H 3.delta H is greater than zero and Tdelta S is less than
asked by ok 
ENGLISH Literature
In "The Open Window" What does "Romance at short notice was her speciality" means? Does it means that romance was all she had to live by. She had no other interest? Thanks Much!!!! Thank you for using the Jiskha Homework Help Forum. Could it mean she fell
asked by DANIELLE 
math
Please help me to find the first and third quartiles, Q1 and Q3, of the following set of numbers.13, 7, 15, 13, 13, 12, 9, 11, 19, 9 Qrrange the numbers in ascending order, like this: 7, 9, 9, 11, 12, 13, 13, 13, 15, 19 Now divide then into the lowest
asked by carmen 
history
What were the 2 most valued possessions of the pioneers that owned the conestoga wagon? You may be able to find your answer in this site, although I didn't see anything about most valued possessions. http://www.answers.com/topic/conestogawagon I would say
asked by Mack 
to record admission of new partner into partnershi
I was just wondering if anyone could help me with the following problem. I am not sure even where to start. Reed, Sharp, and Tucker were partners with capital account balances of $80,000, $100,000, and $70,000, respectively. They agreed to admit Upton to
asked by undecided 
history
What vital right did the Spanish allow the Western farmers? Answer: It was that Spain allowed Americans to travel on the lower Mississippi to New Orleans and to ship their goods. "cORRECT right??" mmhmm Can you help me out with this one???? Did you ever
asked by Mack 
Chemistry
Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? The potassium ion is a spectator ion. You have written ionic equations (but omitted the arrows to separate
asked by Emi 
chemistry
Okay, so apparently ASA and FeCl3 form a violet complex and FeCl3 forms with phenol groups to make purple. Looking at the structures of ASA and salicylic acid, only salicylic acid has the phenol group. The thing is, salicylic acid is supposed to be an
asked by Andrea 
history
Can someone please check my answers? I have to put the sequence in order that the events happened. 9.The Lewis and Clark expedition leaves st.louis 8.thomas jefferson authorizes robert livingston to offer $10million for new orleans and west flordia.
asked by Mack 
English
I am doing a reading comprehension project and I need to find a book and a song about "the elderly". Please Help!! do you mean like about old people or a book called The Elderly? about old people. about old people. hang on I'll look google Books About the
asked by Suzanne 
music
where can i get free instrumental music, like music with out anyone singing in it, just the music background? Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1. http://freeplaymusic.com/ 2. (Broken Link Removed) 3.
asked by haya 
history
Which one matches??? k. because of his urging, the election of 1800 was finally settled L. set up regional courts for the U.S with 16 judges and other officials. I. claim by an Adams appointee to force the delivery of his commission. F. appointed chief
asked by Mack 
physics
An organ pipe is open at both ends. It is producing sound at its sixth harmonic, the frequency of which is 257 Hz. The speed of sound is 343 m/s. What is the length of the pipe? m open: doesn't this mean the length is equal to n/2 wavelengths, where n=
asked by Cavin 
help
i need help solvin this quadratic equation 2x^2+x6=0 1/3x^2+8x3=0 Try to factor, then set the factors equal to 0 to find possible solutions for x. For the first one: 2x^2 + x  6 = 0 Factors are: (2x  3)(x + 2) = 0 Setting the factors equal to 0: 2x  3
asked by jc 
Discrete Math
You are stranded on a deserted island, and along the way you stumble across a genie. He says he will get you off the island provided that you can meet his conditions. He hands you a 20sided die, and says that you need to roll it 1000000 (one million)
asked by Bob 
Calc Help
demand = (p+1)sqroot(q+1)=1000. Find elasticity of demand at a price of $39 per unit. I am really struggling with this problem is there anyone that can help me? i am not familiar with the terminology, but if you are trying to solve for p, it is not that
asked by Rob 
history
Why was Thomas Jefferson alarmed to learn that the French controlled the Louisiana Territory? Answer: He was worried about American trade on the Mississippi River. The U.S was afraid that France, under Napoleon Bonaparte, wanted to build empires in North
asked by Mack 
thermodynamics
Which of these statements are in accord with the three laws of thermodynamics? AThe entropy of the universe never decreases BA nonspontaneous process can occur if it is coupled to a process which is sufficiently spontaneous CThe temperature of the
asked by anonymous 
chemistry
Which factors below affect the rate of a chemical reaction? Collision frequency Number of collisions having the least activation energy Intermolecular orientation Being Exothermic or Endothermic Also, what formula would I use for this problem: "What is
asked by anonymous 
history
What enormous area of land was anchored to the South by the city of New Orleans? http://en.wikipedia.org/wiki/Louisiana_Purchase So it's the Mississipi River right? Isn't it Louisiana? No the Louisiana Purchase yes. :') Who informed American diplomats that
asked by Mack 
Math
How do you get a slope if you only have the yintercept. example: (0,5) and (3, 4) To find slope: slope = (y2  y1) / (x2  x1) With your values: slope = (4  5) / (3  0) = 9/3 = 3 I hope this will help and is what you were asking.
asked by Sissy 
Geology
1b  I have to draw a cross section showing the relationship with gabbro cutting across sandstone and schist with schist being the oldest. 1c  I have to write a brief geological history of the region starting with the oldest events. 200 words. Thanks
asked by Desmond 
chemistry II
What is most likely to oxidize out of the following transition metal:? Platinum, copper, gold, palladium, silver? i believe its copper but check and see if i am right
asked by markr 
Calc Help
Marginal Cost = 30sqroot(x+4) with fixed costs of $1000. Marginal Revenue = 900. find profit or loss from production and sale of 5 units. how many units will result in a max profit? what is the max profit? Can someone please help. Trying to review for my
asked by Rob 
Living Environment
Could someone please explain what biomass means? Does it just mean how much energy an organism has? http://en.wikipedia.org/wiki/Biomass thanks, Lance!='} what is increased amounts of nitrogen and phosphorus in a lake
asked by brie 
Math (typo in first)
How do I go about tackling this problem? (I made a problemmodifying typo in the first) The American Medical Association wishes to determine the percentage of obstetricians who are considering leaving the profession becaose of the rapidly increasing number
asked by Edward 
microbiology
can anyone help me to figure out how to work out STANDARD DEVEATION CALCULATIONS please? Do you have a specific example? There are formulas for standard deviation you can use if you are expected to do the calculations by hand. You can also use calculators
asked by nicky 
history
What happened after the Electoral College voted in the election of 1800? http://www.google.com/search?q=electoral+college+1800&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA Lots of interesting information in here. =)
asked by Mack 
Math: Algebra2 Logarithms
Can someone help me find the value of B in this expression???? log 64 = Blog 4 5 5 Grrr... sorry about that. Here's the expression again: log (base = 5) 64 =B log (base = 5) 4 log 64 (base5) = log 4^b (base5) so 64 = 4^b by recognition of 64 as a power of
asked by UnstoppableMuffin 
english
Hi I have to give a presentation in which I must speak of my author Ernest Hemingway, the presentation must include *definiton of genre *list of major figures working in the genre *features of the genre (and special features of any subgenre) I'm also
asked by claudia 
Math
The area of a regular pentagon with a perimeter of 35 units. Join the centre to each vertex to form 5 eq Join the centre to each vertex to form 5 equal triangles. Consider one of those triangles the central angle is 72º and each of the other two equal
asked by Kate 
social studies
how did Mikhail gorbachev affect the government? What did Boris Yeltsin do and how did he affect the government? Please don't give me any links. Please note that we don't do students' homework for them. Our tutors try to give you the information to help
asked by Parth 
algebra
i have two answers to this problem so am not sure which way I need to do in or should say the order i should do it. lease help??????? problem is 7x5+3x=6+x10 what is the order to work this out there is no brackets to this problem 7xx+3x=6+510
asked by Anonymous 
derivative
q=(100/p+1)^2  1 what is q'? use the chain rule: q' = 2(100/p+1)(100/(p^2)) i got q' = 2(100/(p+1))(100(p+1)^2 =2000/(p+1)^3
asked by Evan 
poetry
i need to write a poem about my life it has to be a simile poem. Life is like a ___________ and 10 lines about that thing i need an idea of what to write about plz help! a bowl of fruit? a new car getting old? a box of chocolates? a popsicle on a hot day?>
asked by anonymous 
essay
what is the most important issue facing the global economy? explain the issue in detail and your reasoning for it being so important. I say globalization and someone said that was too broad so I narrowed it down to international trade foreign exports
asked by Greg 
history
on the 1st page can someone please help me??????? Its the 2nd and 3rd black dot next to my nasme. Even if this is a repost, more information needs to be given before we can adequately respond. Please repost with more information. Thanks for asking.
asked by Mack 
biology
can anyone help please??? im asked to explain the meaning of glycosidic C1  C4 Linkage. Im not 100% clear on it!! Any ideas?? Thanks C1 is the carbon on one molecule, C4 is a carbon on another molecule, Since C1 and C4 or on opposite ends of the glucose
asked by bertie 
Finance
Conduct BreakEven Analysis in the following two scenarios: R Squared is a mobile diagnostic imaging company that performs MRI scans of patients at hospitals and clinics that cannot afford their own scanners. General Hospital has contacted R Squared
asked by sarah 
Calculus
Find the area between the curve y=4/x and the xaxis from x=1 to x=e. It is a review question for my final exam and I am really stuck on how to solve You should hope for a final exam question so easy. area= INT y dx= INT 4/x dx from 1 to e area= 4ln x from
asked by Evan 
math
Is it equally likely that a tack will land point up ot point down? Explain it to me please. It has to be point up because the head of the tack weighs more than the point of the tack. So something that weighs a little more than the lighter end will pull its
asked by Victoria 
chemistry!
[blank] mL of 6.0 M H2SO4 are needed to prepare 300 mL of 1.0 M H2SO4 solution. 50 mL x M = mL x M (works for dilution problems but not for all stoichiometry problems.)
asked by Emi 
chem
what has an sp2 hybridized carbon? Amine Alcohol Keytone Ethers Aldehyde
asked by markr 
History
Could someone please find me a website that has great information on Business enterprise in America so I can make a timeline on it. Specific dates that I need are 1906, 1913, 1914 , 1930, 1939. I would greatly appreciate it. This site seems to have the
asked by Dave 
genetics
after 30 seconds of translation you treat a cell with a chemical that blocks the P site on the ribosome so that it does not function anymore. describe what was happening prior to the treatment of the ribosome, and what would happen after the treatment of
asked by cookie 
criminal law
could someone pls give me a proper explantion for policy and proceduresi need to write a paper on a case and use these terms but i don't know the explantions....thank you so much Procedures is how something is done. Policy sets up guidelines that the
asked by kathy 
english essay
"research a controversial issue, either comtemporary or historical, and explain how the audience is positioned by newspapers to view the issue." can someone please tell what "how the audience is POSITIONED by newspapers" mean? It's very rare lately that
asked by Twinkle 
english
anyone know some controversial issues in the news papers lately?if so, please tell me.i really need it.=) thanks! Go to http://news.google.com Read through the stories. Find one that interests you. It might be a local, national, or international story.
asked by Twinkle 
algebra
how do i work out 2/5x6=12 your post shows how important it is to use brackets to avoid ambiguity. do you mean (2/5)x6=12 ? or 2/(5x)  6 = 12 ? or 2/(5x6) = 12 in any case, crossmultiply and your fractions are gone. then solve as a simple basic
asked by Anonymous 
history
Who informed American diplomats that the Louisianna Territory was for sale? Answer: Was it the French or Spain or was it someone else? France, right? I NEED HEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLPPPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!
asked by Mack 
Conducting a BuddhistStyle Fast
Hi everyone! In my quest to better understand Buddha and his teachings, I have decided to conduct a threeday fast in the hopes of having an experience of enlightenment. I got permission from my school to take three days off from school this week
asked by Tyler 
English
Please help me! I need the title of a book that's subject is based on ignorance and another on choice or making a decision. Harper Lee's To Kill a Mockingbird will fit both criteria in certain ways. A more recent book along similar lines is Grisham's A
asked by Cynthia 
MATH
Please help me to find the least common multiple of 24 and 48. 1st go to this site: http://www.aaamath.com/fra66ilcm.html Then give it a whirl and post what you think the answer is and we'll see if you need further help.
asked by carmen 
chem 2
which bronsted lowry acid has the strongest conguate acid? acetate ion flouride ion cyanide ion nitrate ion not flouride that's for sure
asked by jay 
Calc Help
I need to find dq2/dpb and dqb/dpa qa=2500+(600/pb+2)40pa qb=3000100pb+(400/pa+5) a and b are subscripts.
asked by Rob 
math
what is a parabola http://www.answers.com/parabola
asked by matt ferrisi