Questions Asked on
April 30, 2010

General chemistry
A solution of LiCl in water is 18.0 wt% LiCl. What is the mole fraction of LiCl?
asked by gaby 
Chemistry
How many mL of 18 M H2SO4 are required to react with 250 mL of 2.50 M Al(OH)3 if the products are aluminum sulfate and water? How do i solve this?
asked by Anna 
Economics
Define table laying and state the importance of table laying
asked by Dolapo 
chemistry lab
Insert your values for x, y, z, & n into KxFey(C2O4)z·nH2O and provide the correct coefficients to balance the following equation: ___ Fe(NH4)2(SO4)2·6H2O + ___ H2C2O4 + ___ K2C2O4 + ___ H2O2 ___ KxFey(C2O4)z·nH2O + ___ (NH4)2SO4 + ___ H2SO4 + ___ H2O
asked by anonymous 
science
if i weigh 100 lbs on earth how much would i weigh on halley's comet?
asked by makayla 
colleg physics
Sirius is about 9.0 lightyears from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earthbased observer? How far is the trip according to you?
asked by Lanise 
Physics
A cable lifts a 1200 kg elevator at a constant velocity for a distance of 34.5 m. What is the work done by the tension in the cable.
asked by Fallon 
Chemistry
How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.
asked by MEGAN!!!! 
Physics
How much work (in J) must be done to lift a stack of bricks, which has a mass of 600 kg, from the ground to a height of 15 m? Acceleration due to gravity is 10 m/s2
asked by Fallon 
trig
please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1 tan 25° tan 5°
asked by ann 
college physics
Sirius is about 9.0 lightyears from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earthbased observer? How far is the trip according to you?
asked by Lanise 
algebra
write a polynomial for the length of the rectangle: area is 7xto the 4th power minus 14x. the width is 7x.
asked by Jim 
chemistry
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction \rm CaCO_3{\it(s)}\rightarrow CaO{\it(s)}+CO_2{\it(g)} How many grams of calcium carbonate are needed to produce 53.0 L of carbon dioxide at STP?
asked by Anonymous 
Statistics
Suppose a bag contains 7 red chips, 8 black chips, and 3 green chips. You draw two chips (without replacement) from the bag. Find the probability that you drew a red chip ﬁrst and then a black chip second.
asked by Savannah 
Chemistry
A zeroorder reaction has a constant rate of 3.20×10^−4 M/s. If after 35.0 seconds the concentration has dropped to 9.00×10^2M , what was the initial concentration?
asked by D.Walker 
Math
plot the point given in polar coordinates and find the corresponding rectangular coordinates for the point. (1 , 3pi/4) I do not understand.
asked by Abbey(Please help) 
Chemistry
A mixture containing the same number of moles of SO2 and O2 is placed in a 2L container at 900K. The initial pressure is 1.90Atm. A reaction occurs leading to the formation of SO3: 2SO3 + O2 2SO3 After equilibrium is established the TOTAL pressure drops to
asked by TJ 
chemistry
A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use
asked by chase 
computers
I have just started a basic class in programming and I am totally lost. Can someone help me out? I have to write pseudocodes and create flowchart and don't have a clue. I need help with the following: flowchart, pseudocode, Input and Output variables, and
asked by Shawn 
chemistryscience
A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml of 1M NaOH, what is the pH? (pka = 4.74)
asked by jess 
Chemistry
What is the molal concentration of an aqueous calcium chloride solution that freezes at 2.43 degrees Celsius?
asked by Brooke 
Physics
A person pulls a toboggan for a distance of 37.2 m along the snow with a rope directed 25.4° above the snow. The tension in the rope is 84.1 N. How much work is done on the toboggan by the tension force?
asked by Fallon 
physics
A sample of monatomic gas (£^ = 5/3) is expanded adiabatically from an initial temperature, volume, and pressure of 230. ¢XC, 6.00 litres, and 5.00 kPa, respectively, to a final volume of 7.00 litres. (a) What is the final pressure of the gas? (b) How
asked by sarah 
chemistry
A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use
asked by chase 
Probability
The public transport system is aware that one person in twenty does not buy a ticket for their trip. The manager decides to challenge 200 travelling people as to charger they have a valid ticket or not. (a) calculate the probabilty that everyone had a
asked by Anonymous 
Parabola Help
by plotting the graph of parabola y=2+3x2x^2 which 3 option are true 1) the graph is the same as that of y=6+9x6x^2 2)the parabola has a minimum point 3)the gradient of the parabola at x=2 is 0 4)the graphy=2+3x2x^2crosses the xaxis at the same point
asked by rai 
Math
I need to graph the polar equation 3 + 3cosQ and i need to create a table of values for r and Q. Could someone please explain how I would do this? Thank you!
asked by Abbey(Please help) 
algebra
Bayside insurance offers two health plans. Under plan a, Giselle would have to pay the first $200.00 or hre medical bills, plus 30% of the rest. Under plan B, Giselle would pay the fist $210.00, but only 20% of the rest. For what amount of medical bills
asked by Mary 
EA
Anyone else working on An overview of teaching techniques study unit???
asked by liana 
Algebra
22. State the domain of the function y=3x+2 a. D: Real numbers b. D: x not equal to 0 c. D: x < 0 A? 23. State the range of the function y=2x^2 a. R: y greater than or equal to 0 b. R: x not equal to 0 c. R: y < 0 I'm not sure? 24. Is y=sqrt2x a function?
asked by y912f 
English
(telephone call) Hello. May I speak to Tony? 1.  Who's calling, please? 2.  Who's speaking, please? (Which one do we have to use? Are both OK?)
asked by rfvv 
econ 460
1. The demand for a new drug is given by P = 4 – 0.5Q. The marginal cost of manufacturing the drug is constant and equal to $1 per unit. (Prices and costs are in terms of dollars, and quantities are in millions). a. Illustrate on a diagram the following
asked by Anonymous 
chemistry
magine that you have a 7.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what
asked by Anonymous 
Math
how i solve this two equations ib order to find alpha and beta 2=cos(alpha)+1.341cos(beta) 2=sin(alpha)1.341sin(beta)
asked by mohh 
visual images and how to use them
Logical fallacies tend to be ____________________. nonexistent in visual arguments more common in verbal arguments than in visual arguments and often harder to detect more common in visual arguments than in verbal arguments and often harder to detect
asked by Christopher 
Physics
How much work (in J) is done to accelerate a car which has a mass of 3300 kg from a speed of 7 m/s to a speed of 16 m/s?
asked by Fallon 
Physics
A 0.0730 kg arrow is fired horizontally. The bowstring exerts an average force of 60.4 N on the arrow over a distance of 0.894 m. With what speed does the arrow leave the bow?
asked by Fallon 
science/health
I need help with a few questions. Please let me know if my answers are correct or not and thank you. 1 The process of breaking a complex substance down into smaller components is called? A neutralization B metabolism C anabolism D catabolism Answer C
asked by Anonymous 
chemistry(check my answer)
For the cell: C(s) C+(aq) B+(aq) B(s). Metal ______ is the "negative" electrode. is it C(s)
asked by eng 
8th grade
what it he reason a spoon gets hot when put in a bowl of hot soup?
asked by Chris 
chemistry
Can you help me with the following: Calculate the pH that results when 25 mL of .1M HCL is titrated with .1M NaOH solution run in from a buret at each of the stages of volume of .1 M NaOH add in 5.0 mL incrememnts beginning with 0 mL of NaOH
asked by Cathy 
Chemistry
What is the molarity of a potassium chloride solution that has a volumeof 400.0 mL and contains 85.0 g KCl? Please show work.
asked by MEGAN!!!! 
dressmaking and design
A client tries on a skirt you check the side seams they curve toward the back what does this indicate?
asked by karessa 
Trig.
I really need help so please help. write the first trigonometric function in terms of the second trigonometric function. sec x; tan x
asked by Theresa 
To Writeacher
I posted this on here before as well, just to heasr from people if it sounds good, but I'd like to get it edited from you. Can you please check to see if my sentences make sense, and point out any grammatical errors. Thank you very much for all your
asked by Sara 
math
How Many pounds of acid per inch? If you have a tank of 51ft long by 4ft 7in wide, and need to fill it to the two inch mark with hydrochloric acid, how many pounds are you putting in it? (Hint 1 gallon of acid weights 9.8 lbs. Nancy 2:28
asked by Nancy 
English
1. I'd love to introcuce them to you. 2. I'd love to introduce to you them. 3. I'd love to introduce the people to you. 4. I'd love to introduce to you the people. 5. I'd love to introduce the people who are standing over there to you. 6. I'd love to
asked by rfvv 
trig
please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1 tan 25° tan 5°
asked by ann 
Role Model
Hey, I have to do a peragraph on a person whom I consider to be my role model and my role model is my favourite actress Amrita Rao. Can all of you revise it for me? Amrita Rao is my role model because she like me believes in the philosophy that Life is
asked by Anita 
Organic Chemistry
Hello there! I having trouble understanding the relationship between dipole moment and the heat of formation. How do these two relate; for instance, in the reduction of camphor to isoborneol and borneol? In addition, How does the dipole moment changing for
asked by John 
Chemistry
What is the molarity of a solution that contains 0.30 moles of KBr in 400 mL of solution. Please show all work
asked by MEGAN!!!! 
Accounting
How does one determine variance analysis? I am trying to understand this and my text book is confusing me. Also, to determine this, would one find the the answers in the balance sheet or cash flow statement, or from the revenue and expenses?
asked by Barbie 
Physics
When an automobile moves over a wide, closed loop of wire embedded in a road surface, the magnetic field of the Earth within the loop altered? Is a pulse of current produced? Can you cite a practical application for this at a traffic intersection?
asked by elizabeth 
Math
find the solution of the expontetial equation 1+7^(5x)=19
asked by Andrew 
Chemistry
what particle is emitted from the nucleus during a proton and neutron decay?
asked by Anonymous 
Social Studies
This is kind of a weird question, but, I need to do a Medieval ABC book, and right now I'm at E. And I need to draw a picture for the word. My word is "excommunication". But I'm not sure how I could draw a picture of that?
asked by Lea 
Algebra 2
Find the solution of the exponential form in terms of logarithms 2^(2x+13) = 3^(x45)
asked by Andrew 
TRIG
Use the cofunction of a complementary angle. PLEASE HELP ME! tan θ = cot (30° + 5θ)
asked by Liz 
math quick?
5 over 2x5 minus 4 over 5= 1 over 2x5 I have a quick question... what would i multiply by? I know how to do the rest of the problem. Thank you
asked by Brian 
To Writeacher
Writeacher. Could you please edit this for me, and point out all grammatical errors. Thank you very much in return :) Mr. Henry Axhelm Math Period 2, Room 107 I teach five classes a day, Not students, just classes. No sense getting involved With their
asked by Sara 
Human relations
I need help on OSHA what this organization is for, their duties, who they report too, and what organizations are affected by OSHA. Thanks in advance Do supply resource(s)
asked by Ravioli 
English
1. Do you live around here? 2. Do you live near here? 3. Do you live in here? (Are they all grammatical? #1 is the same as #2? #3 is a little different, right?)
asked by rfvv 
college
explain what happens when i drink and eat chai tea and mixed berry scone. topic is expected to cover activation of visual, taste, olfactory receptors. thirst mechanist, digestion, absorption, effects of increased volume of blood pressure; including effects
asked by susie 
trig
can someone please help me with this problem. i'm doing my review right now and i'm stuck? Find cos(s + t) given that cos s = 1/3, with s in quadrant 1, and sin t = 1/2, with t in quadrant 4.
asked by donny 
math
I appreciate your help. This is the last problem that I need help with today. The answer is suppose to be 1/4 3x/x+1=5x over x1 2
asked by Brian 
Biology
What is an ecological property? Would the Belize Barrier Reef Reserve System be an ecological property? Or would the Los Katios National Park be a better option?
asked by Lola 
math
Function k(x) = x+18 Find k(0) k(x) = 6x k(2) k(5) k(2) indicated outputs 2 F(x) = 4x  5x I need help with these can anyone help?
asked by arlene 
college engineering science
A shaft which rotates at 300r/min is uniformly accelerated to 600r/min in 15secs.Calculate: (a) The angular acceleration. (b) The angle through which the shaft has turned during the acceleration.
asked by Ishola 
College Physics
An electron travels at a speed of 0.700c. What is its kinetic and total energy? I got, but this is not right. K , E =3.27×10−14,1.14×10−13 J Thanks for your help
asked by Lanise 
8th grade
in sierra leone and liberia, many WHAT have to leave their homes because of civil wars?
asked by stewie 
Science
How is the kineticmolecular theory related to specific heat, joules, and calories??
asked by Jose 
Intermediate Algebra
Used ASCII Character Solve for X 5=6x+ 6x=59 6x=4 x=2/3
asked by Rose 
Math
2^(2x+13) = 3^(x45)
asked by Brendan 
statistics
Why is the population shape a concern when estimating a mean? What effect does sample size, n, have on the estimate of the mean? Is it possible to normalize the data when the population shape has a known skew? How would you demonstrate the central limit
asked by Amy 
statistics
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval? What percentage of times will the mean, or population proportion, not be found within the confidence interval?
asked by Amy 
Math
Solve each equation: 5 over 2x5 minus 4/5= 1 over 2x5
asked by Brian 
Math
Solve each equation: Thank you 5x over 3 minus x2 over 4 = 5/12
asked by Brian 
Personal Finance
Mary and Joe would like to save up $10,000 by the end of three years from now to buy new furniture for their home. They currently have $1500 in a savings account set aside for the furniture. They would like to make three equal year end deposits to this
asked by amanda 
Chemistry
I know that benzaldehyde decomposes into benzoic acid and benzyl alcohol via Cannizzaro Reaction.. But, can benzyl alcohol go through a Cannizzaro Reaction to form benzaldehyde and benzoic acid?
asked by Sarah 
Math
how do i solveseparable differential equation 7x−4y sqrt(x^2+1) dxdy=0 Subject to the initial condition: y(0)=−10
asked by Lana 
chemistry
you have 2.0 grams of water at 0 degrees Celcius. how many kilojules of heat will freez it?
asked by Anonymous 
accounting
The transaction would decrease one liability account and increase another liability account
asked by kea 
math
what is 135/180 as a grade
asked by katie 
psychology
Can I please have some information to help me discuss this question beloww: Analyze at lease two research methods used for uncovering basic emotions
asked by Rose 
English
Are there any deeper ideas in Journey to the Center of the Earth by Jules Verne? i.e. irony, symbolism, or anything like that
asked by Matthew 
math
A straight line AB of length 10 units is free to move with its ends on the axes. Find the locus of a point P on the line at a distance of 3 units from the end on the x axis.
asked by Edwin 
Health
I need help with a few questions. Please let me know if my answers are correct or not and thank you. 1 The process of breaking a complex substance down into smaller components is called? A neutralization B metabolism C anabolism D catabolism Answer C
asked by Anonymous 
Accounting
The general manager of a business encounter many types of business transaction provide an example of a transaction?
asked by Lashun 
Music
I just composed a song and I need it on a music piece. I need help. I can supply the tonic solfa and would only need it in a piece. Thanks.
asked by Toluene 
Math
What do these factor out too?? (3w^2+w)(6w2) (3y^2+y)(6y+2) (6y^2+2y)(3y1)
asked by Michael 
american government
Consider the phrases “A belief in equal rights has often led to the belief in equality of opportunity;” and “American society does not emphasize equal results or equal rewards;” on p. 141 of the text. Explain these conceptions of equality in 200 to
asked by laurie 
Intermediate Algebra
Solve 6x=59 6x=4 x=2/3
asked by Rose Kendrick 
8th grade
30% of the people in kenya suffer from malnutrition because they grow WHAT and WHAT?
asked by stewie 
Math
here are some fractions : 3/9, 8/9, 7/9, 4/9, 2/9, 5/9, 6/9 If I were to put them in the order of the greatest, what order does that mean and how did you work that out?
asked by Blake 
Math
How do you know which one is the greatest? and why please? 7/8 or 1/2
asked by Blake 
Math
so with 4/8 and 7/8is 7/8 greater or less than 4/8 and why?
asked by Blake 
Math
How do I solve this equation 4n^225=0
asked by Vince 
Intermediate Algebra
Solve this please 5=6x=9 6x=59 6x=4 x=2/3
asked by Rose 
math (parabola)
Hi, the question is: Write the equation of the parabola with vertex(3,1) and xintercepts 2 and 4. I did this: y=?(x3)^21 How to find the avalue? Many thanks, and I appreciate any answer!
asked by Me 
earth science
which type of mountyain is found on island arcs?
asked by Marilyn 
algebra
which point is a solution of the inequality y > 3x + 1? a) (2,1) b) (0,1) c) (0,0) d) (12,4)
asked by ike 
algebra
which point is a solution of the inequality y
asked by ike 
college
propose a health intervention aimed at eliminating health inequities
asked by anita 
Vectors
The vector x and y are the lenght of 3units(they both have a magnitude of 3). If the magnitude of( vectorx + vector y)= root 17, determine the magnitude of (vector x vector y)
asked by John 
Social
Hi i have 2 weeks to write a paper about anything related to marketing. It has to be 7 pages so I need a good topic and a place to find solid information (our teacher said don't use wikipedia at all because he hates it). I was wondering if you could help
asked by Jake 
Math
(9/5) log base 5 (x) = 1
asked by Brendan 
Science
I just learned about binomial nomenclature and taxonomy. Where can I find a database of every single species in the world?
asked by John 
Intermediate Algebra
How are polynomials factored by grouping? Explain and give example
asked by Lynn 
English 122 Composition II
Discuss any areas related to citing sources that you find confusing or difficult to understand or apply.
asked by vickie 
health
not really homework but just not getting answers to all my questions so in short.If an individual suffering from Alzheimer's Disease or other related dementia is content within their environment does that individual have "quality of life" or do you think
asked by april 
Intermediate Algebra
How are Polynomials factored by grouping? Explain and give example.
asked by Lynn 
Business communication
How do you write a positive message for a business that is going to have less work days and shorter hours?
asked by Martha 
crt/205
How will thinking critically influence the way I process information?
asked by Sarah 
math
Solve the equation: Thank you 2/y + y1/3y= 2/5
asked by Brian 
accounting tutoring
these guys are very good in accounting tutoring
asked by Joseph Castillo 
social studies
still looking for more psychosocial challenges facing the old age.Or suggest sites for this.
asked by zurah 
math
can someone help me I am not understandng how to do this; Function k(x) = x+18 Find k(0) k(x) = 6x k(2) k(5) k(2) indicated outputs 2 F(x) = 4x  5x
asked by arlene 
math
can any one explain why this integral diverges ? integration of [(e^(sqrt(t)))/sqrt(t)]dt from 0 to infinity thanks
asked by William 
Math
5 to the second power  (3 4 to the 3rd)
asked by christopher 
Math
0.3x+14.2=x8.41
asked by christopher 
Math
10c(9c1)8=88c+10
asked by christopher 
Math
7/58y times 29y to the 2 power
asked by christopher 
Math
2x+y x=2/7 y=5/6
asked by christopher 
statistics
H0: ¦Ð ¡Ü .60 versus H1: ¦Ð > .60, ¦Á = .05, x = 56, n = 80 can someone just explain why alpha is there? Is it used?
asked by barty 
Math
evaluate the expression 2x3y4z x=7 y=3 z=1
asked by christopher 
Math
How do you factor x^31? HELP
asked by Linda 
math
(x^67x^3+10)/(x^32)= Please help I am really lost
asked by marry