Thursday

July 31, 2014

July 31, 2014

Total # Posts: 313

**math**

what is 14 decreased to 12

**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?

**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 ?

**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 jo...

**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. Wr...

**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?

**Personality Psychology**

what is the difference between distortion and displacement?

**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.

**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?

**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 al...

**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?

**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

**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)?

**elements of calculus **

if d^2y/dx^2= x/x^2 +1, find d^4y/dx^4

**elements of calculus **

find ds/dt if s= sqaureroot of t over (3t -1)

**elements of calculus **

write the equation of the line tangent to the curve y= 3x^3- 2x at the point where x=2

**Business**

The purpose of the General Agreement on Tariffs and Trade (GATT) is to

**human services**

my beliefs, values, and clinical gesatalt with individuals and systems paper

**Chemistry**

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

**Chemistry**

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

**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?

**chemistry**

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

**Chemistry**

What is the value of the equilibrium constant for the dissociation of acetic acid's proton? What does this value tell you?

**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?

**math**

u=(3,-4) v=(-5,-2) u-v=?

**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)

**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 f...

**chem **

how do you Convert moles S2O3^-2 to moles I2

**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 0.04...

**chemistry**

how do you Convert moles S2O3^-2 to moles I2

**chemistry**

S2O3^-2..... why is it to the power of -2?

**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 acco...

**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.

**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 fir...

**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...

**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 n...

**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...

**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....

**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 ...

**English**

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

**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.

**ethics**

What is the relationship and impact that scarce resources have on administrative ethics?

**MAth**

Name two numbers that can be equally divided by 4 and 6

**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?

**algebra**

the expression below is the factorization of what trinomial -7(x+5)(x+8)

**college**

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

**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...

**Adult College**

Discuss generally the role of planning in each of the three levels of positive behavior support (PBS).

**Adult College**

Describe two planning processes typically used in programs for children, youth, and families.

**science**

how do you make a phytoplankton at home

**Physics**

When I initially did it I got 2.23Hz.. which was also incorrect.

**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 hav...

**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?

**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?

**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)

**chemistry**

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

**chemistry**

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

**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.

**chemistry**

for a given reaction, the activation ener

**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.

**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 .....

**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.... ...

**art **

no he is a composer

**Chem, LAST ONE PLEASE HELP!**

Even the correct formula to use would be a HUGE help!

**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.

**chemistry**

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

**chemistry**

Thank you! This helped a lot!

**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.

**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.

**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.

**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.

**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)

**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.

**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

**Math**

((6-6)x6)+6/6 = 1

**UNIVERSITY COMPOSITION AND COMMUNICATION I (AXIA) **

I start this class in about a month i just want to know a little bit about it

**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

**math**

837 divided by f = 31

**Physics**

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

**algebra**

Use the method of substitution to solve the system. xy=1 4x-y+3=0

**chemistry**

Thank you for all of your help DrBob!!!!

**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)

**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?

**chemistry**

What volume will 0.35 mol of Ar occupy at -10 degress C and 0.96 atm?

**chemistry**

no there is no melting or boliling point given.

**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

**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?

**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

**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?

**Chemistry**

Thank you !

**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?

**English**

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

**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.

**Chemistry**

What volume of a 0.600 M solution of AgClO4 is needed to produce 160g of AgCr04?

**Chemistry **

You made this so easy! Thank you!

**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?

**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.

**pre- calculus**

simplify 3x+2y/3y

**Math**

No it doesn't

**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?

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