Tuesday
September 16, 2014

Posts by tara


Total # Posts: 311

chemistry
If 5.50 moles of aluminum are reacted with 4.55 moles of copper(II) chloride, how many moles of aluminum chloride are porduced by the limiting reactant?
February 13, 2012

CHEM
Cl2 + SO2 + 2 H2O --> 2 Cl^1- + SO4^2- + 4 H^1+ 1) Which element is oxidized ? (simply write the element symbol; e.g. Fe, O) 2) How many electrons are lost by each atom ? (1, 2, 3) 3) Which element is reduced ? 4) How many electrons are gained by each atom ?
February 12, 2012

Algebra
Mildred makes $3 an hour babysitting and $6 an hour when she works at Wendys. Her parents do not want her working more than 20 hours per week. Mildred would like to earn at least $70 a week. Write a system of inequalities that show the number of hours she could work at each ...
February 5, 2012

Algebra
The twin theater charges $7 for adult tickets and $4 for children 12 or under. The theater has 470 seats. The manager wants to have a nightly income ( two shows) of at least $5000. Write a system of inequalities for the number of children and adult tickets that can be sold. ...
February 5, 2012

Math 4th Grade
Adult Tickets are $5 Child Tickets are $2 There are twice as many children as adults at the concert. The total amount collected was $1,080. How many adults are at the concert?
January 25, 2012

Personality Psychology
what is the difference between distortion and displacement?
January 24, 2012

appl,ied business research & statistics
When would you use Chebyshev’s theorem and the empirical rule in health administration? How are they calculated? Provide one real-life example that requires Chebyshev’s theorem and one that requires the empirical rule.
January 18, 2012

Math
Kamala had 5,026 grams of flour in a canister. She brought a 4,157 gram bag of flour. She poured some flour from the bag to the canister. As a result, the mass of the flour in the canister is now twice the mass of the flour left in the bag. How much flour is in the bag now?
January 12, 2012

physics
Four masses are positioned at the corners of a rectangle, as indicated in the figure below (not to scale). (a) Find the magnitude and direction of the net force acting on the 2.0 kg mass if x = 0.40 m and y = 0.12 m. (b) How do your answers to part (a) change (if at all) if ...
November 27, 2011

physics
A 3.28-kg bucket is attached to a disk-shaped pulley of radius 0.108 m and mass 0.727 kg. (a) If the bucket is allowed to fall, what is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How far does the bucket drop in 1.65 s?
November 17, 2011

Chemistry
Calculate the mass of Glauber's salt needed to lower the temp of air in a room by 6.3 C. The mass of air in the room is 555.4 kg, the specific heat is 1.2J/g-c
October 24, 2011

elements of calculus
cost, revenue, and profit are in dollars and x s the number of units cost: if the cost function for a particular good is C(x)= 3x^2 +6x + 600, what is the (a) marginal cost function (b) marginal cost if 30 units are produced? (c) interpretation of your answer in part (b)?
October 11, 2011

elements of calculus
if d^2y/dx^2= x/x^2 +1, find d^4y/dx^4
October 11, 2011

elements of calculus
find ds/dt if s= sqaureroot of t over (3t -1)
October 11, 2011

elements of calculus
write the equation of the line tangent to the curve y= 3x^3- 2x at the point where x=2
October 11, 2011

Business
The purpose of the General Agreement on Tariffs and Trade (GATT) is to
October 4, 2011

human services
my beliefs, values, and clinical gesatalt with individuals and systems paper
October 2, 2011

Chemistry
What is the maximum mass of S8 that can be produced by combining 92.0g of reactant? 8SO2 + 16H2S -> 2S8 + 16H2O
September 18, 2011

Chemistry
What is the maximum mass of S8 that can be produced by combining 92.0g of reactant? 8SO2 + 16H2S -> 2S8 + 16H2O
September 18, 2011

physics
during takeoff, an air plane goes from 0 to 360km/hr in 5s. A.) what is its acceleration? B.) How fast is it going after 5 s? C.) How far has it traveled by the time it reaches 50m/s?
September 12, 2011

chemistry
does a mixture of carbonic acid, H2CO3, a weak acid, and sodium bicarbonate, NaHCO3 in water constitute a buffer? If no explain why
July 28, 2011

Chemistry
What is the value of the equilibrium constant for the dissociation of acetic acid's proton? What does this value tell you?
July 28, 2011

chemistry
a solution is prepared by dissolving 02.50 mole of Ba(OH)2 in enough water to get 4.00 L of solution. What are the OH- and H3O+ molar concentrations?
July 28, 2011

math
u=(3,-4) v=(-5,-2) u-v=?
July 9, 2011

Trig
Water is being pumped at a 3 cubic feet/minute into a cylindrical storage tank with a circular base of a radius 4 feet. Find the depth of the water (d) as a fucntion of time (t)
April 29, 2011

Math
A) Sometimes - Parallelogram has sides that parallel to each other. Therefore this can be a rhombus, square or rectangle. B) Always -Sides of a square are all equal. All the angles are right. If you draw 1 diagonal you get a right triangle. A^2+B^2=C^2. This will be the same ...
April 29, 2011

chem
how do you Convert moles S2O3^-2 to moles I2
April 4, 2011

chemistry
A student determined the chloride content of a commercial salt by using the Mohr method. A 0.5324 -g sample of the salt was dissolved in distilled water and diluted to a final volume of 250. mL. A 25.-mL aliquot of the analyte solution was then titrated against a standard 0....
April 4, 2011

chemistry
how do you Convert moles S2O3^-2 to moles I2
April 4, 2011

chemistry
S2O3^-2..... why is it to the power of -2?
April 4, 2011

chemistry
A 1.2431 -g alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis. The addition of excess KI(aq) solution precipitated the copper as cuprous iodide and liberated elemental iodine ...
April 4, 2011

english
Thanks SraJ and deanna, I do believe those are the four types simply because the paragraph asks for types of writing, not critical reading skills. Thanks again.
March 21, 2011

english
the assignment is to write a paragraph explaining the key differences between the four types of writing. I need clarification on whether the four types of writing should be summary,analysis,synthesis,evaluation or narrative, descriptive, comparative, expository. I know the ...
March 21, 2011

calculus help.Pleaseee(thankyou guys for helping
Your Open QuestionShow me another » Calculuss homeworrk heelp? A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from...
March 17, 2011

calculus
an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong pane is over the airport.?When will they be the ...
March 17, 2011

BOOKS.. english
Explain how John Hersey blended characteristics of fiction and nonfiction in Hiroshima. How does this combination of genres help Hersey convey his feelings about the atomic attack on Hiroshima? Write a short essay that explains your answer. Support your ideas with details from...
March 11, 2011

English.. Literature... books
k .. well i do have some questions with ANSWERS, but am not really sure of the answers ... 1. Since the 1970', American poetry has? A. been characterized by diverse voices and styles B. become increasingly narrow in subject matter C. reflected a more elitist perspective D...
March 11, 2011

English.. Literature... books
can u give me multiple choice questions from the "examview" on the story "A Noiseless Flash" from Hiroshima by John Hersey ... i really need to practice this selection. Plz if u can, copy and paste the questions because the link you might send me would not ...
March 11, 2011

English
When the government issued the Susan B. Anthony, dollar coin on July 2,1979 it met with some disapproval.
March 10, 2011

Biology
You find an unusual organism growing on the bark of a dying tree. Under a microscope, you observe that its cells are eukaryotic, have cell walls, and do not contain chloroplasts. Into what kingdom would you classify this organism? Explain your decision.
March 8, 2011

ethics
What is the relationship and impact that scarce resources have on administrative ethics?
March 4, 2011

MAth
Name two numbers that can be equally divided by 4 and 6
February 10, 2011

physics
How fast (in ) must a centrifuge rotate if a particle 8.00 from the axis of rotation is to experience an acceleration of 117000 's?
February 10, 2011

algebra
the expression below is the factorization of what trinomial -7(x+5)(x+8)
February 4, 2011

college
How will the use of Ashford’s Online Library aid you in finding credible resources to support your academic writing?
February 2, 2011

Adult College
Positive behavior support is an application of a behaviorally-based systems approach to enhance the capacity of schools, families, and communities to design effective environments that improve the link between research-validated practices and the environments in which teaching...
January 27, 2011

Adult College
Discuss generally the role of planning in each of the three levels of positive behavior support (PBS).
January 27, 2011

Adult College
Describe two planning processes typically used in programs for children, youth, and families.
January 27, 2011

science
how do you make a phytoplankton at home
January 17, 2011

Physics
When I initially did it I got 2.23Hz.. which was also incorrect.
January 11, 2011

Physics
Original Question: A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 5.00 cm. What is the oscillation frequency of the two block system? bobpursley s'ltn: F=kx = mg x=mg/k but for the second block we ...
January 11, 2011

Physics
A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 5.00 cm. What is the oscillation frequency of the two block system?
January 11, 2011

math
Consider a simple game in which you will roll a six-sided die and receive $3.00 if you roll a 6. If it costs you $0.90 for each roll, what is the expected value?
January 5, 2011

chemistry
a buffer is made by mixing 0.1 moles of acetic acd a sodium acetate in 500 ml of solution. determine the pH of the buffer. (Ka for acetic acid - 1.8E-5)
December 15, 2010

chemistry
the molar solubility of PbS, in a 0.150 M ammonium sulfide (NH4)2S solution is? The Ksp for PbS= 3.2E-28.
December 15, 2010

chemistry
calculate the pH of a 1.94M solution of nitrous acid (HNO2 - ka = 4.5E-4).
December 15, 2010

chemistry
the activation energy is 31.7kj/mol. if the reaction rate is 7.4E-2 at 35.0 degrees c, what is the reaction rate constant at -55.0 degrees c.
December 15, 2010

chemistry
for a given reaction, the activation ener
December 15, 2010

chemistry
I am doing a boiling point problem and dont know the value of i for the equation delta T = i(kb)(m) solution contains 45.0g caffeine in 25.0 g benzene.
December 15, 2010

chemistry HELP
laboratoories order hydrochloric acid as a concentrated solution (e.g. 36% W/V). what initial volume of concentrated laboratory hydrochloric acid should be diluted to prepare 5.00L of a 0.12 mol/L solution for an experiment? plz can someone show me how to do it step by step...
December 9, 2010

chemistry need help plzzz tomorrow is a TEST!!!
phosphoric acid is the active ingredient in many commercial rust-removing solution.calculate the volume of concentrated phosphoric acid (14.6 mol/L)that must be diluted to prepare 500mL of a 1.25 mol/L solution. how can i calulate the volume cocentration for this question.... ...
December 9, 2010

art
no he is a composer
December 7, 2010

Chem, LAST ONE PLEASE HELP!
Even the correct formula to use would be a HUGE help!
November 24, 2010

Chem, LAST ONE PLEASE HELP!
consider the reaction: CO(aq) + Cl2 (aq) --> COCl2 (aq). Calculate Delta G at non standard conditions. T = 298.15K. Concentration of COCl2 is reduced to 0.01832 M while the concentrations of CO and Cl2 remain 1M. Delta G rxn = -67.4 kj.
November 24, 2010

chemistry
why is this reaction spontaneous? Mg + 2Cu2+ --> Mg2+ + 2Cu+ Mg2+ + 2e --> Mg E= -2.37 V Cu2 + e --> Cu+ E= 0.15 V
November 24, 2010

chemistry
Thank you! This helped a lot!
November 24, 2010

chemistry
For the voltaic cell Cr(s)/Cr3+(aq)//Ni+2 (aq)/Ni(s), list the reactions at the cathode, anode, and the overall net reaction.
November 24, 2010

chemistry
For a certain reaction, Delta H(not) = -76.8 kj and delta S(not) = -217 j/k. If n =3, calculate E for the reaction at 25degrees celcius.
November 24, 2010

chemistry
For a certain reaction, Delta H(not) = -76.8 kj and delta S(not) = -217 j/k. If n =3, calculate E for the reaction at 25degrees celcius.
November 22, 2010

Chemistry
For the voltaic cell Cr(s)/Cr3+(aq)//Ni+2 (aq)/Ni(s), list the reactions at the cathode, anode, and the overall net reaction.
November 22, 2010

chemistry
assuming the following reaction proceeds in the forward direction, what is oxidized and what is reduced? Cu2+ (aq) + Ca(s) --> Cu (s) + Ca2+ (aq)
November 22, 2010

chemistry
consider the reaction: CO (aq) + Cl2 (aq) --> COCL2 (aq). Calculate Delta G at non standard conditions for the reaction at 298.15k, if the concentration of COCl2 is reduced to 0.01832M, while the concentrations of CO and cl2 remain at 1M. Delta G rxn = -67.4kj.
November 22, 2010

chemistry
Calculate the Delta G(not) for the reaction: C(s) + CO2 (g) --> 2 CO Delta Gf : CO2 = -394.4 kj/mol Delta Gf : CO = -137.2 kj/mol
November 22, 2010

Math
((6-6)x6)+6/6 = 1
November 22, 2010

UNIVERSITY COMPOSITION AND COMMUNICATION I (AXIA)
I start this class in about a month i just want to know a little bit about it
November 17, 2010

Math
If B is the midpoint of line AC, D is the midpoint of line CE, and line AB is congruent to line DE, then AE equals 4AB
November 16, 2010

math
837 divided by f = 31
November 11, 2010

Physics
If you lift a 57.7kg box 2.41m over your head, how much work did you do?
November 10, 2010

algebra
Use the method of substitution to solve the system. xy=1 4x-y+3=0
October 28, 2010

chemistry
Thank you for all of your help DrBob!!!!
October 27, 2010

chemistry
When 2.53 g of NaOH(s)(40.0g/mol) dissolves in 100.0 g of water, the temperature of the solution changes from 20 degrees C to 26.3 degrees C. Calculate qrx in KJ/mol specific heat of the solution is 4.18 J/(g*K)
October 27, 2010

chemistry
When an evacuated glass bulb at 75.0 ml volume is filled with a gas at 25.3 degrees C and 747 mm Hg, the bulb gains 0.0114g. The gas is?
October 27, 2010

chemistry
What volume will 0.35 mol of Ar occupy at -10 degress C and 0.96 atm?
October 27, 2010

chemistry
no there is no melting or boliling point given.
October 27, 2010

chemistry
Ethylene glycol (antifreeze) has a specific heat of 2.42 J/(g*K). Calculate q when 3.65 kg of ethylene glycol cools from 240 degrees C to 78 C
October 27, 2010

Chemistry
How many L of O2 are produced when 2.53 g of KClO3 (122.55g/mol) reacts at 0.934 atm and 354 K?
October 27, 2010

Chemistry
We have 250. ml of He at 2.56 atm and 25 degrees C. What is the final volume if we heat the sample to 150 degrees C while we compress the volume to 100. ml
October 27, 2010

Chemistry
A 0.10 M solution of a weak acid has a pH of 3.5 at 25%C. What is the equilibrium constant, Ka, for this acid?
October 10, 2010

Chemistry
Thank you !
October 6, 2010

Chemistry
Phenylcarbinol is used in nasal sprays as a preseriative. A solution of 0.52g of the compound in 25.0g of water has a melting point of -0.36C. What is the molar mass of phenylcarbinol?
October 6, 2010

English
I think it may be either Hasty generalization or Post Hoc, but I'm not sure.
October 2, 2010

English
IS this sentence a fallacy? If so what type? If you start out with a bottle of beer a day and then go to a glass or two of wine in the weekends, you're well on your way to becoming a hopeless drunk.
October 2, 2010

Chemistry
What volume of a 0.600 M solution of AgClO4 is needed to produce 160g of AgCr04?
September 27, 2010

Chemistry
You made this so easy! Thank you!
September 27, 2010

Chemistry
What is the molarity of 550.0 mL of KOH solution, that reacts completely with 675 mL of a 0.450 M CrCl3 solution?
September 27, 2010

Chemistry
Aluminum sulfate reacts with barium chloride to yield barium sulfate and aluminum chloride. What mass of barium sulfate is produced from 650 mL of 0.320 M of aluminum sulfate? Thank you.
September 27, 2010

pre- calculus
simplify 3x+2y/3y
August 12, 2010

Math
No it doesn't
August 10, 2010

Math
A man comes up to play a game. you flip a coin, if heads you win $1 and keep playing if heads again you get $2, if you get heads again, $4 and so on. If you flip tails you take your money and the game is over. How much should he be willing to pay?
August 10, 2010

Math
100
July 22, 2010

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