Questions Asked on
January 9, 2007

ap chemistry!! help!!
some solutes have large heats of solution, and care should be taken in preparing solutions of these substances. The heat evolved when sodium hydroxide dissolves is 44.5 KJ/mol. What is the final temperature of the water, originally at 20.0 degrees Celcius.
asked by john 
geometry
what geometric concept is modeled by the beam of a flashlight? what geometric concept is modeled by the beam of a flashlight 5
asked by Amanda 
chemistry
9. using bond energies, estimate the change in Hr for the following reaction. 2NO + O2>2NO2 A 1624 kJ B 247kJ C 661 kJ D 54kJ 10. using bond energies estimate the change Hr for the follwing reaction C + 1/2O2 +1/2 N>O=C=N a 611kJ b 109kJ c 2770kJ d
asked by NATIE 
social studies help plz!!!!!!!!!!!!!!
im doin a s.s project on christopher columbus's voyage and its kinda hard finding information!! can u give me any helpful websites?? This web site has a lot of good information about Columbus's voyages.
asked by Crystal 
Chemistry
What is the strongest of the intermolecular forces http://wine1.sb.fsu.edu/chm1045/notes/Forces/intermol/Forces02.htm The strongest is electrostatic forces between ions. But I don't call electrostatic forces between ions "intermolecular forces." They are
asked by Bryan 
Chemistry Check if its right XD
Ok here is the problem but i only need help on part a XD i think i did it wrong..so can you check my work? and tell me where i made the mistake? The space shuttle uses aluminum metal and ammonium perchlorate, NH4ClO4, in tis reusable booster rocket. The
asked by becky 
Science
What physical quantity will all observers always find the same value for?
asked by Lisa 
English
Does anybody know the author to the poem The Tide Risen the Tide Falls? by: Henry Wadsworth Longfellow
asked by Ron 
social studies
explain how the agricultural revolution led to the establishment of perment settlements The first agricultural revolution, also called the Neolithic Revolution, occurred as long as 25,000 years ago. However, most people consider the agricultural revolution
asked by jasmine 
Chemical Compounds
How can a flow chart help you to name chemical compounds? Some people like to memorize rules and use the analysis of compounds then to apply the rules. CAN YOU HELP ME!!
asked by Devon 
ap chem
There are several oxides of nitrogen; among the most common are N2O, NO, and NO2. 1.Write the Lewis structures for each of these molecules. In each case the oxygens are terminal atoms. 2. Which of these molecules "violate" the octet rule? 3. Draw resonance
asked by Justyna 
Chemistry
what particles are free to drift in metals? cations, electrons, neutrons, or protons? and what is the SI unit of mass? is it kilogram kg is correct for the SI unit of mass. Electrons conduct electricity; therefore, the electrons must be free to move in
asked by Bryan 
AP Chem
use simple structure and bonding models to account for each of the following: A. the bond length between the two carbon atoms is shorter in C2h4 then in c2h6. B.the bond lengths in SO3 are all identical and are shorter than a sufur oxygen single bond. C.
asked by Justyna 
chemistry
Here is a reaction: 2Al+3H2SO4>Al2(SO4)+3H2 determine the oxidation numbers of each element in both the rectants and the products of this oxidation reduction reaction of aluminum and sulfuric acid? Which element is oxidized in this reaction? Which
asked by chrissy 
Social Studies Plz help...
what is the Glorious Revolution? thank you for your help!! http://en.wikipedia.org/wiki/Glorious_Revolution Im doing a report on ancient africa for language arts its going to be counted as two grade social study and language arts help The Revolution of
asked by Rose 
math
Mrs. Diaz wishes to save at least $1500 in 12 months. If she save $300 during the first 4 months, what is the least possible average amount that she must save in each of the remaining 8 months? After 4 months, 4 x 300 = $1200 will be saved. That leaves
asked by irina 
global studies
wat political "subunits" make up the UK? The official name of the UK is the United Kingdom of Great Britain and Northern Ireland. Great Britain's subunits are England, Scotland, and Wales. These entitities are further broken down into counties, buroughs,
asked by michelle 
science(chem)
Calculate the binding energy per nucleon for the following nuclei: a: 12C(nuclear mass, 11.996708 amu) 6  b. ^37Cl(nuclear mass, 36.956576) i'm confused on how to solve and if theres a specific formula for this... please help thank you add the
asked by Jina 
CHEMISTRY
the hindenburg was a hydrogen filled dirigiable that exploded on 1937. The Hindenburg held 6.5*10^5 L of hydrogen gas at 23C and 760mmHg, what mass of hydrogen (H2) was present? calculate n in PV=nRT mass=n*molmassH2
asked by TIFFANY 
Language Arts
Is her a noun? Is cat a person, place or thing? Isn't her a pronoun? Either a possessive or personal pronoun? A cat is a thing, the word cat is indeed a noun. Your dictionary can be a big help on these words... yes and thing A cat is a thing her is a
asked by Quin 
math
what makes the use of variables diffcult to understand? what makes them difficult to understand is : Depending on which variables are used somehow they have to predict just how they vary, and what factors influence the variation this is what i got helped
asked by jordan 
Chem
what does an ite or ate ending in a polyatomic ion mean? i'm thinking it mean Oxygen is in the formula, or is it Sulfur is in the formula? i'm not sure oxygen is in both ites and ates. The ate has more oxygen than ite. NaClO2 sodium chlorite NaClO3
asked by Dennis 
Accounting
1. The company uses a joborder costing system. How would you recommend that manufacturing overhead cost be assigned to production? 2. Recompute the company's unit product costs in accordance with your recommendations in (1) above. Direct
asked by Chris 
algebra 2
Factor completely with respect to the integers. 1. 9x^2  4 2. x^3 + 64 3. 200x^2  50 4. 8x^3  64 5. x^3 + x^2 + x + 1 6. x^3  2x^2 + 4x  8 7. 2x^3 + 4x^2 + 4x + 8 8. 2x^3 + 3x^2 32x  48 9. 7x^3 + 14x^2 + 7x 10. 6x^3  18x^2  2x +6 11. 3x^4  300x^2
asked by anonymous 
Algebra
The area of a square garden in square feet is 49x^214x+1. Find the dimensions of the garden in terms of x. FActor the quadratic:(7x1)^2 Gee, a square. the dimensions are 7x1 on each side. FActor the quadratic:(7x1)^2 the dimensions are 7x1 on each
asked by bailey 
Social Studies...Help plz
Can you find me a website about Triangle Trade Route. (New England) Thanks a lot to who ever helps me out!! =] http://asterix.ednet.lsu.edu/~kfossey/4507/lesson3/cenac/group4.html THANKSSSSSSS Some New England trading ships followed the triangular trade
asked by Stephanie 
General
How come when someone asks a question others cant look at their question... all i see is the name of the person the subject and teacher of that subject!:( I tried to click on it to see the question and poof!!!! NOTHING btw wheres my question We can see
asked by Justine 
algebraPlz help
Posted by bailey on Monday, January 8, 2007 at 8:32pm. Posted by bailey on Monday, January 8, 2007 at 2:12pm. The area of a rectangular blanket in square centimetersis 40x^2+2x65. The width is 4x5cm^2. Find the dimensions of the blanket in terms of x.
asked by bailey 
Math  Algebra
A. Solve the following quadratic equations. Make sure to show all your work. Do not use any method (e.g. factoring, completing the square, quadratic formula, graphing) more than twice. Use the graphing method at least once. 1. 3x+2 + 11x 20 =0 2. x2 + 3x
asked by Angela Again! 
Pattern
Can someone help me find the pattern and the next 3 numbers in the pattern? 10,1,6,6,11 I would think the next numbers would be 2, 7, 7, 12 But why? The difference between 10 and 1 is 9. The difference between 1 and 6 is 5. So , if you restart the pattern
asked by Kim 
Biology
1. How many base pairs are in a full turn or twist of a DNA molecule? 2. Name the complementary base pairs on DNA. AT; GC are the pairs, you name them. there are 10 1/2 base pairs for a full twist in DNA How does the nucleotide sequence in one chain of
asked by Becky 
Science
The potential energy of a golf ball in a hole is negative with respect to the ground. Under what circumtansces (if any) is the ball's kinetic energy? Its rest energy? The KE cannot be negative, nor can the rest energy be negative.
asked by Lacy 
Help
does anyone know anything about bieng a lawyer? yes i am one the debate team does that count in a way...do u live in new york? becuz there is a debate between different schools in columbia universty. im on the debate team too..but dat doesnt mean
asked by annaiiz 
math,correction
can someone correct this for me. 7(x –3) > 5x  14 7x –21 > 5x –14 5x 5x 1x –21 > 14 +21 +21 1x > 7 1x / 1 > 7 / 1 x > 7 the line has an open circle right on number 7 with an arrow going to the positive side. No. WHen you subtraced 5x from 7x,
asked by jasmine20 
Biology help..!
How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA? The are complementary. How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA?
asked by Becky 
CHEMISTRY QUESTION
Imagine you have a light bulb and battery conductivity tester. You are given a dilute solution of copper sulfate and a dilute solution of vinegar, acetic acid. Coppersulfate is an ionic compound. You may recall acetic acid reacts with water to produce ions
asked by ALISHA 
Science/Chemistry
Is this true Dispersion forces generally increase in strength as the number of electrons in a molecule increases. The number of electrons can only increase if more atoms are added to the molecule. The molecule has to stay electrically neutral. Dispersion
asked by Jeff 
Math HURRY !!!!!!!!
These 3 questions are very confusing can some plz tell me how to solve them 1) What percent of 9 is 4? 2) What percent of 25 is 10? 3) What percent of 40 is 12? THANKS FOR HELPING!!! 1)44% 2)40% 3)30% thanks but how did u get the answer did u multiply or
asked by rebecca 
math... HURRY!!!
i need help. i can't figure out the answers to these two problems. ~ 3n+100= ??? ~ 200n+32= 70059!!! HEEEELLLLLLLPPPPPP!!! thanks 200N+32=70059 MOVE 32 TO THE RIGHT AND MAKE IT NEGATIVE. 200N=7005932 THEN SUBTRACT 7005959=70027 THEN DIVIDE
asked by Brianna Mae 
Help
do u think homosexuals should be in the army? i think they should be in the army becuz they are people too (human beings). they shouldn't be left out the army becuz their sexuality but of what they can do to help the army? I think so. I don't believe that
asked by Annaiiz 
math,correction
can someone correct this for me please. Statistics. Sam must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75,63, and 68. Write an inequality representing the score that Sam must get on the last
asked by jasmine20 
Algebra
the surface area of a sphere is a=4 pie r squared where r is the radius of the sphere. waht is the radius, rounded to the nearest tenth, of a ball with surface area equal to 85 square inches? below the question is A. 2.6 in. B 6.8 in. C. 2.7 in. D 6.7 in.
asked by kati 
us gov't politics
i'm doing a free response fro U.S government and politics and I am reading a graph where i have to describe a trend. one of the trend i noticed was that there was a decrease of ten percent of democrats in 19621964 of partisan identifications in US. I have
asked by david 
spelling
can someone please help me. this question is due tomorrow. question.......... #1 Can you figure out these phone messages? Rewrite each message as a complete sentence.................. a) No xtra seats aval. Meet btwn gate 7&8 @ 4p.m CU B4 the game. (That
asked by krytstal 
Algebra 1.
Factor: 50r^8 – 32r^2 The caret symbol represents a power. 2r^2(25r^6+16)= 2r2(25r6+16) DrBob222 forgot a minus sign: 50r^8 – 32r^2 = 2r^2(25r^6  16) Then, inside the brackets, you see a difference of two squares: 25r^6  16 = X^2  Y^2 with X = 5 r^3
asked by Elton 
english
rearrange thes letters into one word Imbillie, you did not give us the letters... please repost.
asked by imbillie 
poetry
Who put the cat among the pigeons? Unfortunately we are unable to get hold of a copy of the book. Please can anyone help. put/set the cat among the pigeons (British & Australian) to do or say something that causes trouble and makes a lot of people angry or
asked by dude 
Algebra2 Inverses
The Law of Gravitation is represented by the formula Fg=G(m1m2/r2) What would be the inverse of this function Fg1? What would this force represent? Can someone plz hurry and answer this for me
asked by Natalie 
MATH
what is a constant rate of change? That means the velocity changes over time in the same manner. 4,800 +3,700 =4,500 Rate of Change Is Constant You can increase or decrease the amount or concentration of a species by a constant value using a zero order
asked by Austin 
french!
for homework tonight we are to write a french poem about someone. i am doing it on my friend carly. does anyone have a french word that begins with the letter 'y'? haha i cant find anyword! (accept YOGA.) thanks! yeux bandes (with an accent on the e in
asked by L. 
chemistry
calculate the density of NO3 gas at 0.970mm Hg and 35C Take 1 liter. calculate n in PV=nRT then, density= mass/volume= (n*molmassNO3)/1liter. I STILL DON'T UNDERSTAND HOW TO DO IT COULD U PLEASE EXPLAIN What don't you understand about PV = nRT and how that
asked by TIFFANY 
JUST HELP ME
ok i have to write a constitution and i have everything i want on it but i need to know how to put it in constitutional form please help TAYLOR Graves Make an outline. THen in the outline organize it by function: executive legislative judicial
asked by Taylor 
Science
A wooden block is submerged in a tank of water and pressed down against the bottom of the tank so there is no water underneath it. The block is released. Will it rise to the surface or stay where it is? I think it will rise to the surface because of the
asked by Kat 
math
i have another question as well.. square root of 3x=x6..thanks i got an answer that doesnt work out os if u could jus help me out on these thx :) I would square both sides first so you have 3x = x^2  12x + 36. Then subtract 3 on both sides so you have
asked by joe 
Science
What are the equivalents of 0 K, 0°C , and 0° F in the other temperature scales? Use the formulae below to calculate the scale you want. K = 273.16 + C F = 9/5*(C) + 32 C = (F32)*5/9
asked by Mae 
math
I need to know the math factors of 15 15*1=15 5*3=15
asked by kimberly 
social studies
what are the advances of early culture groups in north america This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups
asked by jasmine 
social studies
how did native americans adapt to their environments This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups to
asked by jasmine 
social studies
what kind of civilization did mesoamerica develop I will be happy to critique your thinking on this.
asked by jasmine 
Japanese
I need someone to correct my translations... Can you please help :(... at least some, here they are: 1.
asked by Cortney 
gov't help please
why is getting access to a ballot an obstacle to cross for minority parties in order to win elections. i looked on the internet and read that they have to be nominated and stuff but how is it more harder for minority parties than it is on majority parties
asked by david 
Moment/Physics
I understand a moment is a weight being moved by a particular distance. Although I am unable to establish what weight by how far would make a moment. eg 1 pound by 1 inch 1 pound by 1 foot 1 ton by 1 foot 1 Kg by ??? Explanation please. Mike You do not
asked by Mike 
Thermochemistry please
I really need help on this problem... ===================== Hydrocarbon Formula Delta H (kj/mol) 1,3Butadiene C4H6(g) 111.9 a) calculate the fuel value in kJ/g for this compound and determine the percentage of hydrogen by mass. I've tried it for hours yet
asked by Jina 
7th grade math
what is the equivalent expressin of 7(5x) 35x ? 35x
asked by Amber 
Science
We are studying energy my questions What happens to the momentum of a car when it comes to a stop? The momentum is transfered to the Earth. Momentum is always conserved. What happens to the momentum of a car when it comes to a stop?
asked by Mae 
math
what percent of 25 is 10? please explain how to get the answer. 40% well how do uget the answer? i need to know okay say what percent of 25 is 10 you do 10 divided by 25 and it gives you the percentage of .4 which is 40% move the decimal over two places
asked by Carina 
Physical Science
How much work is needed to raise a 110kg load of bricks 12 m above the ground to being under construction? work in joules= weight*height where weight is mass*9.8m/s^2
asked by Tammy 
Science 11th grade
In an ionic compound, what is the net ionic charge? and what compound does an ide ending generally indicate?
asked by Jeff 
chemistry
155.0 grams of N2 (nitrogen gas) are put in a 4.50L container at 35C. What is the pressure? PV=nRT n=155/molmassN2 Convert temps to K.
asked by TIFFANY 
Science
Why do you think the Celsius temperature scale is sometimes call the centigrade scale? It is divided into 100 units from water freezing to water boiling.
asked by Kim 
MARKETING!!
PLEASE HELP ME MATCH THE FOLLOWING... 1.standard of living 2. economies of scale 3. division of labor. 4. gross domestic product 5. investment. 6. diminisihing returns 7. infrastructure. 8. production 9. productivity 10. technology. a. value of final goods
asked by MARKETING HELP =] 
Science
Why do tables of densities always include the temperature for which the listed values hold? because temperature causes things to expand or contract, changing its volume, so density changes.
asked by Tindy 
Religion , edit.
Can someone edit this for me or help me make it sound correctly or even better. I would greatly appreciate it. please....:) How did the childhood experiences of Siddhartha Guatama (Buddha) lead to his questioning of the spiritual practices of his time?
asked by kailin 
math correction
can someone correct this for me.Also do i have to solve it all the way or what does it mean by inequality form. Business and finance. The cost for a longdistance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion
asked by jasmine20 
physical science
describe your motio when you are on a swing in terms of kinetic and potetial energy. at which point during your motion is each type of energy the greatest Potential energy is hghest when the elevation is highest. Potential energy is lowest (and kinetic
asked by allie 
Physical Science
Most would expand, greater volume, lesser density. Density= mass/volume What would be true of the densities of most solids and liquids at a temperature higher than the quoted one?
asked by bobpursley 
math
what is the square root of 5z2, then it says plus 7=10 First, subtract 7 from each side so you now have: sqrt(5z2)=3. Then square each side, so you now have: 5z2=9. Then add 2 to each side so you have 5z=11. Then divide each side by 5 and the answer is
asked by joe 
Chemistry
how many electrons does nitrogen gain in order to achieve a noblegas electron configuration? is it 4? Nope, it's 3. Looking across period 2, you can see that Nitrogen has 5 valence electrons. It wants 8. 85=3. Thanxs. How many significant figures are in
asked by Bryan 
math
belinda if ur still here to help i would appreciate it so much but 5z2 (5z2 is under a radical sign) +7=10 anyone else who knows how to solve this with it coming out equal please help thanks again :) wow, I am SO incredibly stupid 3 times in a row! When
asked by joe 
social studies
how did asians migrtate to america http://www.time.com/time/classroom/glenfall2006/pdfs/who_were_the_first_americans.pdf http://www.mnh.si.edu/arctic/html/peopling_siberia.html Scroll down to From Siberia to the Americas
asked by jasmine 
social studies
what kind of civilivation did north america develop This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups to
asked by jasmine 
social studies
how did native americans adapt to their environment I will be happy to critique your thinking on this.
asked by jasmine 
science
The Earths Interior: "Ability of a solid to flow or change shape like a thick liquid." It is one word. The third letter is an (A)and it is 10 letters long. plasticity
asked by Doug 
please help calculus
find the volume of the solid formed by revolving the region bounded by y=e^x, y=0, x=o and x=1 about the y axis by using the shell method, i got v=2*pi int(o to 1) (x)(e^x) dx and my teacher said the answer is e/2 but i keep getting a different answer Are
asked by david 
solving for x
y=e^x how do i solve for x. i use the LN process right. i forgot how to do that ln(e ^ x) = x Leo, you have merely stated an identity. David was solving y = e^x for x, which would be x = ln y Thanks reiny.
asked by david 
Chem
What causes dispersion forces? Disperson forces are caused by an unsymettrical distribution of charge in the molecule, causing a net electric force. http://www.chem.purdue.edu/gchelp/liquids/disperse.html
asked by Dennis 
Death Penalty
Do you believe we should sentence children or handycap people to death? I think we should if they mean it what they've got guilty of. The problem is that many found guilty turn out to be not guilty. And many found "guilty" in fact were not culpable in the
asked by Janet