Belinda
Most popular questions and responses by Belinda
Chemistry  solubility
Arrange the following compounds in order of increasing solubility in water: * O2 * LiCl * Br2 * CH3OH Like dissolves like; that is, polar compounds usually are soluble in water and nonpolar compounds are not soluble in water. From that description, make
asked on January 2, 2007 
AP Chem
When NH3 gas is introduced at one end of a long tube while HCl gas is introduced simultaneously at the other end, a ring of white ammonium chloride is observed to form in the tube after a few minutes. This ring is closer to the HCl end of the tube than the
asked on January 23, 2007 
PhysicsHelp please...
The graph give the acceleration a versus time t for a particle moving along an x axis. The a axis scale set by a=12 m/s^2. At t = 2s the particle's velocity is 10 m/s. What is its velocity at t = 6s. I know that I am supposed to used integrals to solve,
asked on October 1, 2011 
math
Suppose you are going to roll a die 60 times and record the proportion of times that a 1 or 2 is showing, s. The sampling distribution of s should be centered about....?
asked on February 5, 2008 
Chemistry  Van't Hoff Factor
How does the van't hoff factor relate to freezing points? If one van't hoff factor is bigger than another, is its freezing point lower or greater? delta Tf = iKfm. So increasing i will increase delta Tf Van't Hoff factor is the concentration of particles
asked on January 5, 2007 
physics
A worker in a warehouse uses a rope passing through some pulleys to lift a heavy crate. The worker exerts a force five times less than the weight of the crate but has to move the rope four times as far as the crate moves. This situation... A) can happen
asked on July 5, 2014 
English
Speech. Help me with this speech which reads english is a language of opportunity why bother teaching indigenous languages.
asked on July 17, 2019 
math
In a large population of adults, the mean IQ is 112 with a standard deviation of 20. Suppose 200 adults are randomly selected for a market research campaign. The probability that the sample mean IQ is greater than 110 is...?
asked on February 5, 2008 
Chemistry College
If KHP sample 1 requires 22.47 mL of aqueous NaOH, how many milliliters of NaOH should be needed for samples 2 and 3?
asked on April 18, 2013 
New AP Chem Question for Dr. Bob
This is a Hess' Law problem. I think I got it but I'm hoping you could check it for me: Calculate the heat of reaction for changing 1 mol of silica, SiO2, that has been extracted from sand into the pure silicon that is needed to make computer chips. Use
asked on January 23, 2007 
health
Much research is being conducted on repairing faulty sensory organs through devices such as personal guidance systems and eyeglasses, among others. Do you think that researchers should attempt to improve normal sensory capabilities beyond their
asked on November 13, 2014 
Math
If on a scale drawing 100 feet are represented by 15 inches, then a scale of 1/2 inch represents how many feet?)
asked on January 12, 2019 
Statistics
If the mean of a set of data is 20.00 and 12.20 has a zscore of 1.30, then the standard deviation must be: What formula would you use to determine this?
asked on April 7, 2011 
u s history
what factors led to western expansion at the the? what other factors contributed to the expansion? how has the notion of Manfiest Destiny shaped the world today?
asked on March 7, 2011 
Statistics
One of my classmates ask this question and it wasn't answered so now I am asking it and of course we are all struggling with no strong Math background Case 6.4 Maternal Serum Screening Test for Down syndrome Please keep in mind that I do not have a Math
asked on February 7, 2011 
PreCalc
Does y=1/x have an inverse? It is a onetoone function, so it should be the inverse equation is the same??? yes, the inverse is the same. Check it with G(f(x)) So, when drawing the inverse, it is just the same graph?
asked on January 21, 2007 
AP Chem  to Dr. Bob
I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg.
asked on January 23, 2007 
Physics
If a 1.00 kg body has an acceleration of 3.69 m/s2 at 75° to the positive direction of the x axis, then what are (a) the x component and (b) the y component of the net force on it, and (c) what is the net force in unitvector notation? If f = ma can f =
asked on October 22, 2011 
calculus
If an equation of motion of a particle is given by s(t)= Acos(ùt + ä), the particle is said to undergo simple harmonic motion. Find the velocity of the particle at time t. When is the velocity 0?
asked on September 27, 2011 
AP US History DBQ Question
For my midterm I was given a list of DBQ topics that she will pick from to give to us. I wrote the question below and I don't have the documents yet, but I have a general outline and I'm hoping people on this site can give me opinions and some more
asked on January 24, 2007 
computer
I need to do the degrees celcuis and fahrenheit abreviations on my computer document, can someone tell me what keys to use. oC & oF. Do you want to post them on this board or is this a document you are writing. If the latter, what program are you using. If
asked on January 11, 2007 
Statistics
the average numbers of hours a cat sleep is approximately normally distributed with a mean of 15 hours and a standard deviation of 1.7 hours; what percentage of cats sleep between 13 and 18 hours
asked on April 27, 2014 
financial analysis
A zero coupon bond with a par value of 1,000 has 15 years to maturity. If the YTM is 6.2% what is the current price of this bond?
asked on April 18, 2014 
Business
The free shipping and manufacturer’s warranty that comes with a coffee maker represent which category of purchase criteria among the Four Utilities of Customer Value? Form Ease of possession Time Place
asked on April 7, 2014 
Cubic Equations
I have three that I need help with if possible. 1. Solve 2x^3  3x^2 = 6x  9 2. Find all real and imaginary roots of the polynomial equation 3x^4  x^3 + 4x^2  2x  4=0 3. Find a cubic equation with integral coefficients and roots 3i and 5.
asked on January 8, 2012 
Child safety car seat question
To function properly,children's safety seats and restraints must: 1. be installed correctly and anchored to the vehicle. 2. face the back of the seat. 3. come with a lap belt and shoulder harness. Would number 1 be the best answer? My text says: "Safety
asked on April 17, 2007 
AP US History
Is a DBQ supposed to be a generic 5paragraph essay or is it a certain length??? A DBQ is a question based upon facts presented in a document. For most purposes, it can be any length. But the generic 5paragraph essay is a standard. Check this site for
asked on January 24, 2007 
AP Chem  to Dr. Bob
I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg.
asked on January 23, 2007 
AP Chem
What is the STP for temperature? Is it 25 degrees Celsius? DO you go to Gateway High? me? no. why? STP is 1 atmosphere for pressure and 0 Kelvin (273o C).
asked on January 23, 2007 
Math
Steps of calculations that show the simple interest on a R5000 loan for 3 years at 9 percent interest
asked on February 21, 2016 
English 125 Introduction to literature
What does the term literature mean to you? What makes something literary in your own mind? If literature means different things to different people, who defines what is and what is not literature? 2.What kind of reading engages/interests you? What about
asked on June 6, 2012 
chemistry
what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)
asked on February 2, 2011 
chemistry
what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)
asked on February 2, 2011 
English
Write an essay on university education in a paragraph.
asked on October 31, 2010 
The Digestive System
Trace the path of food from ingestion to defecation and describe what happen at each stop? Also name enzymes.
asked on December 9, 2009 
Chemistry
Zinc coats Iron and prevents it from rusting. However Iron cannot be used to coat zinc and prevent it from corroding.Explain this phenomenon.HELP PLEASE URGENT!!
asked on October 24, 2009 
calculus
what is the integral of (x^2x+6)/(x^33x)? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just don't know how to get there.
asked on March 2, 2008 
US History
How did the KansasNebraska Act indirectly wreck the Compromise of 1850? This site will explain that conflict. http://www.infoplease.com/ce6/history/A0827030.html
asked on January 2, 2007 
US History
Is anyone on here in AP US History? Ask your question, state your thinking on it. Yes is the answer to your question. What were the LincolnDouglass debates? Check this site for information bout these debates. http://www.nps.gov/archive/liho/debates.htm
asked on January 2, 2007 
6th
Is (a) a linking verb? :)
asked on June 21, 2017 
math
number sense does the expression d12 have a greater value when d=42 or when d=46
asked on September 26, 2012 
computers
can you please help me with compare and contrast Lans, Wans, Cans,Mans, Hans
asked on May 2, 2011 
Statistics
For a set of data with mean 12 and variance 9, approsimately 68% of the values will fall between 6 to 18. Is the true or false and how do you find the answere?
asked on April 7, 2011 
math
whats the integral of e^(3sqrt(x))? i think i'm supposed to use substitution but i don't know what to substirute, i tried u= x^(1/3) but it didn't work out, please help!
asked on March 1, 2008 
Poem Help Needed
This is a poem by John Berryman that I am supposed to analyze and I am completely confused by. If anyone has any observations or ideas about the main idea of the poem, PLEASE help me out! "The Traveller" They pointed me out on the highway, and they said
asked on April 8, 2007 
AP US History
Was the War of 1812 defensive or aggressive on America's part? I feel like it was aggressive because we attacked first, but maybe it was defensive because we were defending ourselves against impressment. Someone please clarify this for me, thanks. You're
asked on January 25, 2007 
AP Chem
When a gas filled balloon is cooled, it shrinks in volume; this occurs no matter what gas is originally placed in the balloon. Why? I was thinking maybe because the number of collisions are less and so the slower moving particles aren't hitting the walls
asked on January 23, 2007 
Discipline
Carl is getting tired of two children in his threeyearold room having wetting accidents on the playground. The class always uses the restroom before they go outside,but two of the boys are wetting themselves at least once a week,making Carl have to send
asked on January 16, 2007 
Discipline
I have a couple of questions that I need some help with. 1.Miss Wiggs is trying to read a story about elephants before her first grade class leaves that morning for a trip to the local zoo.The children have already sat through calendar and weather time,as
asked on January 16, 2007 
Discipline
Kyle, a twoandahalf year old, is stacking blocks in the block center. Karen is playing beside him with some large cars. As their teacher Melanie watches, Karen rolls her car into Kyle's tower causing it to fall. Kyle hits Karen causing her to cry.
asked on January 16, 2007 
English
In Nathaniel Hawthorne's "Dr. Heidegger's Experiment", I was asked to figure out how Hawthorne feels about transcendentalism. We determined that Dr. Heidegger represents Ralph Waldo Emerson, a transcendentalist. However, I can't decide if Hawthorne thought
asked on January 4, 2007 
William Lloyd Garrison
How was William Lloyd Garrison a "pacifist" and also burned the Constitution, etc.? He seems pretty violent and liberal, not pacifistic, but the textbook calls him one. http://en.wikipedia.org/wiki/William_Lloyd_Garrison
asked on January 1, 2007 
accounting
Cartwright inc has $1,000,000 of 10% bonds outstanding on December 31, 20x8. On January 1, 20x9 adams corp and 80% owned subsidiary of Cartright, inc purchases a $250,000 part of cartwrights inc's outstanding bonds in the market for $245,000. Interest
asked on April 21, 2014 
English
What is the importance of feedback in communication?Explain.
asked on November 3, 2010 
astronomy
Why is the sky blue?
asked on January 21, 2008 
math
12(17)/ 23(23)
asked on September 8, 2007 
Chemistry  Rate Law
The following example is given in my textbook: If a chemical equation is: NO2 (g) + CO (g) > NO (g) + CO2 (g) The rate law is: Rate = k[NO2]^2 Usually you put in the reactants in their own sets of brackets, so why isn't the reactant CO involved in the
asked on January 31, 2007 
Math , correction
correct Write the equation of the line passing through each of the given pairs of points. Write your result in slopeintercept form, where possible. (2,3) and (2,4) this is what i did for it. m= (4(3))/(22)=(7)/(0)= slope is undefined which means that
asked on January 24, 2007 
calculation
how do I figure out the calculation of 999, 822 and the date of 5/14/2015 to equal 51981220?
asked on September 23, 2015 
Statistics
What percentage of cats sleep less than 10 hours? What percentage sleep more than 20 hours
asked on April 27, 2014 
math
number sense does the expression d12 have a greater value when d=42 or when d=46
asked on September 26, 2012 
Physics  acceleration..need to find velocity
I am given two points on an acceleration vs time graph: (2,13),(4,0). When t = 2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints
asked on October 21, 2011 
Physics
I am given two points on an acceleration vs time graph: (2,13),(4,0). When t = 2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints
asked on October 20, 2011 
algebra
Here is my question. How do you solve th substitution method in this problem? 9x  y = 40 y = 4x
asked on September 11, 2011 
history of design
discuss the whatham paper project
asked on April 11, 2011 
math
factor 3m^2n + 2m
asked on March 3, 2010 
mth
(2)^2 ?
asked on February 24, 2010 
Ethics
What forms of testing do sociologist utilize to measure prejudice?
asked on March 28, 2008 
calculus
what is the integral of x^2x+6/x^33x? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just don't know how to get there.
asked on March 1, 2008 
US History
Why did the National Labor Union collapse? Please don't give me links  I've looked everywhere, including Wikipedia. I just don't understand what actually caused it to collapse so I'm looking for an answer. I'm trying to connect it to the collapse of the
asked on February 12, 2007 
AP US History
What was Thomas Jefferson's party called against Hamilton's Federalist party? Check this site for your answer. http://www.pbs.org/wgbh/amex/duel/peopleevents/pande05.html
asked on January 25, 2007 
To Jasmine20  FOILing
Try this website to learn about FOILing better: Go to Google and type in "FOIL" Click the first option (it starts with algebra.help........) If you can't find the exact website, just look through Google to find a lesson on FOILing. I think that one should
asked on January 24, 2007

math
b= Library t= Textbooks p= Telephone 1) b+p= 2t 2) t+p= 3b 3) b+t+p= 36
posted on December 9, 2017 
Maths
1.8km
posted on May 17, 2017 
Math
i dont know
posted on January 9, 2017 
math
Exact Form 25000e^0.2 answer: $3084
posted on February 16, 2016 
human services
Can lower the cost
posted on June 17, 2015 
physics
work done by man: 4h*1/5w=work work done on crate: h*w=work w&h = 1 man = 4*.2 = 0.8 crate = 1*1 = 1 So is it D?
posted on July 5, 2014 
Business
9. Which of the following trends is causing marketers to place more emphasis on competitive differentiation? (C) A. Investment costs that are accrued during the Introduction phase. B.Increasing speed with which products are brought to market. C.Subsequent
posted on April 7, 2014 
english
Born in Manila, Salonga began performing at age seven.
posted on November 28, 2012 
math
2150
posted on January 27, 2012 
Cubic Equations
Thanks so much :D
posted on January 8, 2012 
medical coding 1
If you get your answers off of this site or others like this double check your work. Just because they are on here does not always make them correct. I wanted to do a little reasearch on an assignment I had and came across this site I started double
posted on January 20, 2011 
English
should i talk about the relevance
posted on October 31, 2010 
Research Project on Computer Confidentiality
I am working on the same project and I know your frustrations. I have been to the libraries in two diffrent counties and two college book stores along with Barnes and Nobles with no luck on any refrence guides. I took the advice from the person abouve and
posted on August 4, 2010 
Reseach paper
I too am doing the same paper through Penn Foster. I found the information on the ama web site just dosen't seem to be enough information to make a long enough paragraph and I can not find any help at my local libraries or online. I found a good book but
posted on August 3, 2010 
mth
you must have been reading my problem wrong though...? I'm saying 2 to the 2 power
posted on February 24, 2010 
mth
already tried that. google calc. isn't always necessarily correct...but thanks for the attempt!
posted on February 24, 2010 
Chemistry
But then copper and tin can also be used to plate iron even if they're less reactive than iron.
posted on October 24, 2009 
Chemistry
The water would change to ice. This is because bond breaking energy is higher than bond making energy hence more heat would escape from the water. Therefore temperature would drop and water would change to ice and consequently increase in volume.
posted on October 24, 2009 
Chemistry
what is H2C2O4
posted on February 22, 2009 
math
so my final answer would be 1/3 right? it seems too simple to be true...
posted on February 5, 2008