Questions Asked on February 5, 2007

Use the Substitution method to solve the system of equations.y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's
1. 5 answers
2. asked by Margie
3. 5,114 views
Location A is 3.00 m to the right of a point charge q. Location B lies on the same line and is 4.70 m to the right of the
1. 2 answers
2. asked by Anna
3. 5,071 views
How many representative particles are in 2.5 mol H2O2?each mole consists of 6.02*10^23 things. Memorize that.
1. 3 answers
2. asked by Dennis
3. 3,914 views
What is the slope of a line through(-5,2) and (6,7) in the standard(x,y) coordinate plane? Sorry, I forgot the choices F.9 G.5
1. 2 answers
2. asked by bailey
3. 2,298 views
A railroad flatcar of weight W can roll without friction along astraight horizontal track. Initially, a man of weight w is
1. 1 answer
2. asked by Tammy
3. 2,094 views
are these endothermic or exothermic?2H2O2 (l) �¨ 2H2O(l) + O2(g) ∆H = -190 kj C(s) + H2O (g) �¨ CO (g) + H2 (g) ∆H =
1. 1 answer
2. asked by key
3. 1,735 views
You do it by finding Uuh in the periodic table and knowing that it will have chemical properties that are similar to those in
1. 1 answer
2. asked by DrBob222
3. 1,579 views
problem:Dena borrowed $7500 to buy a used car. The credit union charged 9%(percent it looks kind of funny) simple intrest per
1. 2 answers
2. asked by Lindsey
3. 1,483 views
What is the density of N2O, a gas, at STP?How many moles are in 16 grams of O2? density = mass/volume 1 mol of a gas occupies
1. 1 answer
2. asked by Chris
3. 1,453 views
Two charges are fixed in place with a separation d. One charge is positive and has nine times (n = 9) the magnitude of the other
1. 0 answers
2. asked by Ann
3. 1,425 views
I'm supposed to write a poem in iambic pentameter and then scan it (with stressed and unstressed marks). However, I can't seem
1. 2 answers
2. asked by Claire
3. 1,302 views
When a tlc plate was developed the solvent front ran off the top of the plate, why?A two component mixture containing a
1. 0 answers
2. asked by Richard
3. 1,284 views
Part B True-FalseClassify each of the statements as always true, sometimes true, or never true. 1.____ST______ one mole of any
1. 1 answer
2. asked by Bryan
3. 1,233 views
How are length, area, and volume related in terms of the three dimensions of space?and How is it possible for objects of the
1. 1 answer
2. asked by Leiann
3. 1,208 views
Coordinating conjunctions are these: FANBOYS (for, and, nor, but, or, yet, so).Whenever you use one of these conjunctions to
1. 0 answers
2. asked by Writeacher
3. 1,178 views
How are length, area, and volume related in terms of the three dimensions of space?and How is it possible for objects of the
1. 0 answers
2. asked by Leiann
3. 1,170 views
whta were the three most populous states in 1860? were they northern or southern states?http://www.civilwarhome.com/population18
1. 0 answers
2. asked by vanessa
3. 1,141 views
A mother is twice as old as her daughter now, but ten years ago, she was 3 times as old as her daughter. Fins their ages at
1. 1 answer
2. asked by Michelle
3. 1,102 views
Assistance required as to why visible light is not emitted when infrared radiation falls on fluorescent materials.
1. 0 answers
2. asked by ruby
3. 1,064 views
Al2Se3 (s) + H2O (sub>(l) ==> Al(OH)3 (s) + H2Se(g)You
1. 0 answers
2. asked by DrBob222
3. 1,052 views
What factors/influences help shape a country's identity? How does the leadership/government of a country generate consensus for
1. 0 answers
2. asked by Alba
3. 1,031 views
How much sodium hydroxide, at what concentration, do I need to add to 500 mL of 0.1 N HCL to obtain pH 6.8. How do you calculate
1. 0 answers
2. asked by Ruby
3. 876 views
Hi,how many moles does 0.225g of oxygen atoms represent? If 1 mole of oxygen atoms represents 16.0g? Thanks mols = grams/molar
1. 0 answers
2. asked by bertie
3. 868 views
I have this question on a homework assignment and I am confused!It is not wise to rely on the__________ to determine whether a
1. 0 answers
2. asked by Rachel
3. 862 views
We know that the negative charge on the electron and the positive charge on the proton are equal. Suppose, however, that these
1. 1 answer
2. asked by Lauren
3. 862 views
Completion (Help)To find the mass of a mole of a compound, scientists add together the __1____ of the atoms making up the
1. 2 answers
2. asked by Bryan
3. 856 views
Hello,I have to create a debate for my English class. I am debating a difficult topic, and I was hoping I could get some good
1. 0 answers
2. asked by Travis
3. 838 views
The balanced equation doesnt seem to help because the thiosulfate is not in the equation, I think it is preventing the reaction
1. 0 answers
2. asked by jacob
3. 811 views
I'm supposed to decide which is more relevant, message wise, to today - the myth of King Arthur or Sundiata. Any ideas?First I
1. 1 answer
2. asked by Claire
3. 807 views
The atomic numbers and masses must added up on both sides of the equation just as we must have the same number of atoms on each
1. 0 answers
2. asked by DrBob222
3. 773 views
In "The Awakening" by Kate Chopin, what is the "gangrene passion"?http://www.pagebypagebooks.com/Kate_Chopin/The_Awakening_and_S
1. 0 answers
2. asked by Anonymous
3. 764 views
What acts brought the United States into World War 1?http://en.wikipedia.org/wiki/World_War_I Read the section on causes. =)
1. 0 answers
2. asked by Anonymous
3. 740 views
~~Use bulleted lists rather than burying data in paragraphs; it's harder to read and comprehend when buried so.~~Use graphs and
1. 0 answers
2. asked by Writeacher
3. 726 views
What did Harding want to do to return America to "normalcy"?Here are his words: http://www.vlib.us/amdocs/texts/34hard1.htm I
1. 0 answers
2. asked by Anonymous
3. 716 views
Please can you assist me with the following problem I am totally muddled - I could swear I've never even heard of science!!!H2SO
1. 0 answers
2. asked by Billy
3. 716 views
The (aq) solution with the lowest freezing temperature would be which of the following:0.010M NaCl 0.020M NaCl 0.030M C6H1206
1. 1 answer
2. asked by anonymous
3. 711 views
what is the mass of two moles of NaCl?You look up the exact numbers on the periodic table or some other chart. I will use
1. 0 answers
2. asked by Dennis
3. 698 views
What is litum paper made of?If you cant find anything can you try to find some websites for me? THANKS A LOT!! 8-] litmus paper
1. 1 answer
2. asked by Christina
3. 691 views
Can you help with this one please?A drop of oil (vol 0.05cm^3) is released on to a calm surface of a pond where it spreads out
1. 0 answers
2. asked by Bruce
3. 687 views
x+1 -x+2 = x+3____ _____ ____ 2 3 4 How do I solve this equations? These are fractions mi don't know I'm going to assume your
1. 0 answers
2. asked by deborah
3. 677 views
(2x-3)(x^2+5x-3)=2x+10x^2-15x+9*Is this correct.? this is a different problem... Here's how this one works out: ......x^2 + 5x -
1. 0 answers
2. asked by Margie
3. 674 views
How many grams of NaCl (molar mass = 58.4 g/mole) must be added to 12.0 g of water (molar mass = 18.0 g/mole) so that Xwater =
1. 0 answers
2. asked by Aletha
3. 672 views
What do you associate a country's identity? Provive an example to help me understand please!Maybe what sort of things do you
1. 0 answers
2. asked by Alba
3. 649 views
Given that arg((z-1)/(z-2i)) = pi/4 describe the locus of P and sketch this on an argand diagram. Show that the point (1,3) lies
1. 0 answers
2. asked by Jake
3. 637 views
Look at gold. It has an atomic number of 79. Adding 1 proton would make it have 80 protons and that element (from the periodic
1. 0 answers
2. asked by DrBob222
3. 631 views
If a chemistry student collected 825 mL of gas at 25 degrees C and 7.90*10^2torr, how many moles did she collect?PV=nRT Put P in
1. 1 answer
2. asked by Chrissy
3. 629 views
Is this equation balanced?2HCl(aq) + Ca(OH)2(aq) -------> 2H2O + CaCl2 yes. It helps in these to write water as HOH, in this you
1. 0 answers
2. asked by Lisa
3. 629 views
The fastest measured speed of a ball in the game Jai-Alai is 302 kilimeters/hour. In men's tennis, the fastest recorded serve
1. 0 answers
2. asked by Chrys
3. 625 views
I have a math question that goes like this: There are 500 light that have on and off switches. One person goes and turns all the
1. 0 answers
2. asked by Danielle
3. 618 views
I started having trouble on part (c), and I need to know this beforeI can go onto the other problems. Plz help! The parabola
1. 0 answers
2. asked by Emily
3. 617 views
Suppose the preferences of the individual change in such a way that the individual requires now to be compensated to forgo one
1. 0 answers
2. asked by tofu
3. 614 views
in your opinion......should bush bring back our troops.I don't think your teacher wants the opinion of an anonymous Internet
1. 0 answers
2. asked by Annaiiz
3. 613 views
I cannot figure out how to work this stoichiometry problem with the given equation: Mg+2HCl-->MgCl2+H2What volume of hydrogen is
1. 0 answers
2. asked by Carter
3. 603 views
Help me out! Thanks! You guys have really helped me before.Question 1 What does the law of inertia say about the velocity and
1. 1 answer
2. asked by Chris
3. 602 views
When were children required to go to school in Wisconsin?1879. more info can be found @ infoplease. can you tell me what you
1. 0 answers
2. asked by Winona
3. 600 views
hey you guys I post a question like five hours ago and I would like to know if there is at least a website in were I could get
1. 0 answers
2. asked by desperate
3. 599 views
x/9 +3 = 8 - x/3Solve?????? First, get rid of the fractions to make the equation easier to solve for x. Let's multiply every
1. 0 answers
2. asked by deborah
3. 597 views
Hi you guys please help me with my chemistry homework, i need to find all these items and take them to my class in a ziploc bag*
1. 0 answers
2. asked by desperate
3. 595 views
(-2x^2y)^3*(5xy^3)^2=(-2x^2y)^3 = -8 x^6 y^3*Is this correct.? (-2x^2y)^3 * (5xy^3)^2 = (-8x^6y^3) * (25x^2y^6) = -200x^8y^9
1. 0 answers
2. asked by Margie
3. 594 views
Dr bob,Thanks, i understand that, at last! But wot if im asked to calculate when it is given as words? would it still be the
1. 0 answers
2. asked by bertie
3. 589 views
A rocket is propelled from the top of a building 30 meters tall so that its height in meters (t) seconds after it is launched is
1. 0 answers
2. asked by Aletha
3. 582 views
I submitted this question earlier... can anyone help me pls.This question is about the polymer made by polymerizing this
1. 0 answers
2. asked by david
3. 581 views
Discussing a book that involves a conflict between two charactersleads children to: 1. examine their values 2. fear
1. 0 answers
2. asked by Karin
3. 579 views
thanks for helping me with the list. By checking the product's labels I'm finding many of the substances the problem now is that
1. 0 answers
2. asked by desperate
3. 575 views
A company is considering a $250 million investment in land that it will hold for 25 years. The pretax net cash flows are $40
1. 0 answers
2. asked by isabella
3. 562 views
what are the different names of equipment used for cooking?Please post the names of the equipment that you know. Then, we'll be
1. 0 answers
2. asked by alice
3. 561 views
What would have happened if the United States had not entered World War 1 on the side of the Allies?Read the prior link I sent,
1. 0 answers
2. asked by Anonymous
3. 561 views
Everything is neutral. Touch a table, a chair, a desk, a tree, and you don't get a shock. Compounds are neutral. So Al2O3 must
1. 0 answers
2. asked by DrBob222
3. 560 views
A company is considering a $250 million investment in land that it will hold for 25 years. The pretax net cash flows are $40
1. 0 answers
2. asked by isabella
3. 560 views
This question is about the polymer made by polymerizing this compound:CH2=CH-CH-OH | CH Please identify the monomer unit - there
1. 0 answers
2. asked by david
3. 555 views
What is considered a good score to achieve on the ACT's? At what score on the 1-36 point scale is so low that you should
1. 0 answers
2. asked by Aubrey
3. 555 views
Can somebody pls help me with this?For the equation below find the net balanced equation: Ag + NO3- --> Ag+ + NO (Note: This
1. 0 answers
2. asked by Lisa
3. 554 views
my i have help?Can you help with this one please? A drop of oil (vol 0.05cm^3) is released on to a calm surface of a pond where
1. 0 answers
2. asked by vada
3. 550 views
What kind of people are good role models?This site will give you some ideaS. http://en.wikipedia.org/wiki/Role_model
1. 0 answers
2. asked by GuruBlue
3. 545 views
I started having trouble on part (c), and I need to know this beforeI can go onto the other problems. Plz help! The parabola
1. 0 answers
2. asked by Emily
3. 545 views
Can anyone please help?ive been asked to write a balanced chemical equation for the breakdown of seleniuos acid H2SeO3 in water
1. 0 answers
2. asked by bertie
3. 528 views
When the Bank of England cut interest rates does that mean inflation is reduced??No. When the Central Bank cuts interest rates,
1. 0 answers
2. asked by Molvis
3. 528 views
can someone explain what "Big O" notation is. I looked on wikipedia and still do not understand it.
1. 0 answers
2. asked by Anonymous
3. 526 views
Why does each time zone extend 7 1/2 degrees on each side of central meridian rather than extending from 0 degrees to 15 degree?
1. 0 answers
2. asked by Bob
3. 526 views
h t t p : / / img . photobucket . c o m / albums / v166 / stuffy1 / Mathhwforjonrevisedwithoutnotes . j p gNix the spaces!
1. 0 answers
2. asked by John
3. 526 views
What the are similarities between aerobic respiration and fermentation?mi don't know to hard go to googles wish i could help
1. 0 answers
2. asked by Amanda
3. 524 views
1.Name the Canadian ports that are opened all year round.2.Which Canadian city is the eastern most provincial capital? Plz help.
1. 0 answers
2. asked by Kate
3. 516 views
Why do people say that we should have a big breakfast and a small dinner?Thank you for using the Jiskha Homework Help Forum.
1. 0 answers
2. asked by Sammy
3. 506 views
B) r h o e e y e y m s r uw_a_ m_ _ea_t _l__ve hint ...or my lungs open my collar http://www.ojohaven.com/fun/crossword.html
1. 0 answers
2. asked by lynn
3. 498 views
what falls but never breaks?what breaks but never falls? night/day
1. 0 answers
2. asked by lynn
3. 471 views
6*1/23 pretty much 6 X .5 which is the half of 6 which is 3!
1. 0 answers
2. asked by Reese
3. 456 views
I need to take some following samples of these:*a hydrocarbon w/a molecular mass greater than 100 g/mo *something w/ L-carvone
1. 0 answers
2. asked by VaNeSsA
3. 454 views
unscramble hautishiatus
1. 3 answers
2. asked by jake
3. 448 views
mols of HCl= 0.1N X 0.5L=0.05 mols of HClTherefore, number of mols of 2N NaOH needed to obtain pH 6.8: 0.05 mols HCL/2 = 25 mL
1. 0 answers
2. asked by Ruby
3. 441 views
can someone please prove the difference rule to me?d/dx[f(x)-g(x)]=d/dx f(x)- d/dx g(x) Go to the definition of a derivative:
1. 0 answers
2. asked by Laura
3. 435 views
Im not sure how to do this.(5q^3)(-12q^-4n^4) So far what i did was multiply 5 by -12 to get -60. Then q^3 by q^-4 to get q^-1.
1. 0 answers
2. asked by Sammy
3. 431 views
my i have help i am making bad gradesWhat if an equation had three variables?
1. 0 answers
2. asked by vada
3. 428 views
3a^3b^2(-a^3b-a^2b^2)=-3a^9b^3-3a^6b^4*is this correct.?- Remember to add exponents when multiplying with the same base.
1. 0 answers
2. asked by Margie
3. 413 views
can someone please prove the difference rule to me?d/dx[f(x)-g(x)]=d/dx f(x)- d/dx g(x) plz help
1. 0 answers
2. asked by Laura
3. 388 views
12.
1. 0 answers
2. asked by Aletha
3. 287 views

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