Thursday

April 24, 2014

April 24, 2014

Total # Posts: 3,179

**math**

its 1 times 6, not 16

**math**

is it multiply or is it x? if its multiply i think its p16

**AP CHEMISTRY**

1)calculate [OH-] and pH for each of the following solutions. (Kw = 1.0*10^-14.) a)0.101 M NaF b) 0.030 M Na2S c)a mixture that is 0.019 M in CH3COONa and 0.036 M in (CH3COO)2Ba please help and if u can try to explain

**AP CHEMISTRY**

THANX

**AP CHEMISTRY**

If a solution of HF (Ka = 6.8*10-4) has a pH of 3.42, calculate the total concentration of hydrofluoric acid.

**james giles math**

is that it?

**math**

how can i make a fraction into a pound

**math**

i tried to simplify 10/8 i got the answer of is 2/4 am i correct

**Chemistry**

How many grams of potassium phosphate must be dissolved in 3.75 Liters of water to produce a soltuion that contains 8*10^23 potassium ions?

**chemistry**

I got to 4x^3 + 6x^2=1.12x10^-12 (my moles of potassium chromate is 1.5 instead of 1) but now I'm stuck

**Math**

You have $47 to spend on music and movie downloads. Each album download cost $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.

**Math**

Please show me how to set and solve: The sum of two numbers is 90. Their difference is 12. What are the numbers?

**amer lit **

how does the song dirty little secrets by the all american rejects apply to the scarlet letter

**math please help**

determine the domain of the real valued function f(x) = sqrt(5 - (sqrtx))

**Logics**

Logicians regard the following as the meaning of the word "argument." (Points : 1) a. A hostile and emotional dispute b. A poetic tribute to Spring c. A set of reasons put forth to support a claim d. The kind of thing one has with a spouse

**statistics**

Find the mean of the given probability distribution. The number of golf balls ordered by customers of a pro shop has the following probability distribution.

**Physics**

A child insists on going sledding on a barely snow-covered hill. The child starts from rest at the top of the 60 m long hill which is inclined at an angle of 30o to the horizontal, and arrives at the bottom 8.0 s later. What is the coefficient of kinetic friction between the h...

**math**

correction!!! f(x) = sqrt( 5 -(sqrt x))

**math**

determine the domain of the real valued function f(x) = sqrt(5 - (sqrt5))

**Human Services**

I have a problem with APA formatting and how to cite Example 1 According to McNamara, n.d The Question---my answer Or do I need to cite each question The amount of questions are about 100

**physics**

need help with this question does anyone know the answer

**Chemistry**

1.9 mol HCl and 3.8 mol NaOH react according to the equation HCl + NaOH −→ NaCl + H2O . Calculate the amount in moles of NaCl formed. Answer in units of mol

**Chemistry**

How much water, in grams, can be made from 3.59 × 10^24 hydrogen molecules? Answer in units of g

**History**

Analyze the appeal of the Omaha Platform to people who felt that industrialism was too dominant in the economic and social foundation of the United states.

**Math**

If a line is measured as 1 4/8 inches how would simplify measurement

**History**

During the late 1800's, the Populist Party supported all of the following EXCEPT? a.) high tariffs b.) tight controls on inflation c.) lower interest rates on loans d.) government control of railroads I think it's either A or B???

**Algebra **

I need help with a riddle my Algebra teacher gave us? Why did the square root of 9 refuse to discuss anything with his brothers cubed root of 9, 1 ninth and the square root of negative 9?

**Logics**

"My husband snores. All men must snore" committs which of these fallacies? a. hasty generalization b. appeal to pity c. false cause d. post hoc ergo propter hoc

**Math**

Please show me how to set this up and how to solve. Thanks in advance. At the local ballpark, the team charges $5 for each ticket and expects to make $1,300 in the concessions. The team must pay its players $1800 and pay all other workers $1500. Each fan gets a free bat that c...

**Math**

Please show me how to set this up: A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110ft., and the distance around should be no more than 380ft. Write a system of inequalities that models the possible dimensions of the...

**english**

Object pronouns include you, she, he, it, and we. True False

**chemistry**

For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation. pH values: NaCl 6.89 NaC2H3O2 7.75 Na2CO3 11.20 Cu(NO3)3 4.73 NH4Cl 5.91 Zn(NO3)2 5.20 KAl(SO4)...

**math**

x/60=30/100 cross multiply to solve for x.

**chemistry**

The Ka value for HCN is 4.9x10^-10. What is the value of Kb for CN-?

**chemistry**

For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation.

**chemistry**

For each solution whose pH value deviated from 7.0 by at least 1.0 pH unit, give an equation accompanied by a statement which gives the reasons and/or explanation for the deviation.

**Chem 11**

im assuming you mean "moles" not "miles" (4.059g sample/1)x(1 mole sample/g of sample in one mole(take number of elements in formula multiplied by individual grams found in the periodic table)). there is your answer. easy as pie.

**Math**

2 sheets of paper for 30 studens: 2(30) if she has 19 and needs more subtract 19 from 2(30). example: (2(30))-19.

**Physics Help!**

A 220 uF capacitor with a 10% tolerance rating is charged. The voltage across the capacitor is measured to be 110 +/- 5.5 volt. Calculate the electrical charge stored in the capacitor. Estimate the error in the charge by propagating the uncertainty in the capacitance and the v...

**Math**

How do I set this up and solve it? Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 4 CDs a month to her collection. Find the number of months after which they will have the same number of CDs.

**Physics!! Help!!!!!**

The time dependence of voltage across a discharging capacitor is given by the exponential decay. The voltage on the capacitor at time t= 0 sec is 24 volt. If a 220 +/- 22uF capacitor and 1 Mega ohm (5% tolerance) resistor are used in the RC circuit, what would be the value of ...

**calculus**

Find f'(a). f(t) = t^4 − 7t

**Math**

Reasoning What is the greatest number you can make using these digits? 572. ..... 257 572 725 752

**harris middle school**

a bag contains 5 red marbles,4 white marbles, and 9 blue marbles. you pick a marble without looking. find the probability of drawing a white marble.

**Business English**

your application will be processed by next Thursday

**chemistry**

Air is 20.9% oxygen by volume.How many mL of air contains 175 mL of oxygen?

**Math**

a farmer wants to put a fence around a rectangular field and then divide the field into three rectangular plots by placing two fences parallel to one of the sides. if the farmer can only afford 1000 yards of fencing, what dimensions will give the maximum rectangular area?

**math**

How can I figure out the the estimate the diffrence between 53 and 37?

**logic**

Mary is poor. She has not been able to find a job and has two children she needs to feed. Assume Mary is forced to let her children go hungry or steal some food from a local grocery store. Which should she do? Construct an argument that supports Mary's decision to steal th...

**science**

what helps a camel walk on sand?

**college algebra**

, for this problem f(x)=3x^2-6x-7,what is the minimum value and where do it occurs, and what is this functions domain and range?

**geometry**

a solid aluminum cube measuring 15 inches on a side is melted and rolled into an aluminum wire tat is 0.2 inches in diameter. what will be the length of this wire?

**chemistry**

Energy in the amount of 470 J is added to a 30.0 g sample of water at a temperature of 9.00 degrees C. What will be the final temperature of the water?

**Compounded monthly**

P - Po(1 + r/n)nt P = $10,000 r = 6.5% n = 12 t = 216MO

**pre- calculus**

consider the collection of all rectangles that have lengths 2in. less than twice their widths. find the possible widths(in inches) of these rectangles if their perimeters are less than 200 in

**business studies**

why do we study shorthand.

**physics**

calculate speed of 8.0 times 10 to the 4th kilogram airliner with a kinetic energy of 1.1 times 10 to the 9th jewles

**ap chemistry**

what is the pH of 2.50M HF (aq)? Ka=7.2X10^-4

**disasters**

why is the idea of a zombie apocalypse possible. this is serious i need to write a 5 page paper on it and i have NOTHING D:

**Chemistry**

a 2.16g sample of Pb(NO3)2 is heated in an evacuated cylinder with a volume of 1.18L. the salt decomposes when heated: 2Pb(NO3)2 (s)_> 2PbO (s) +4NO2 (g) +O2 (g) Assuming complete decomposition, what is the pressure in the cylinder after decomposition and cooling to a final...

**chemistry**

Boron forms a gaseous compound with hydrogen with empirical formula BH3. a 1.05L sample of this compound at a pressure of 88 mm Hg at 295K has a mass of .138g. what is the molecular formula of the compound?

**math**

is/of = %/100 1.8m/x = 4/100 1.8m = (4/100)(x) (1.8m)/(4/100) = x x=45meters (always remember is/of = %/100) it comes in handy even in real life while shopping for good sale deals.

**english**

I take a considerable amount of time on my English course, because it is difficult to write and research topics.

**science 7th grade**

calculated error. id go back and check if i were you.

**Math**

Use multiplication, division, addition and subtraction and at least one set of parentheses to write an expression that simplifies to 7, 13, or 17. Do your work step by step and explain each step as you simplify the expression. Demonstrate the consequences of not using the pro...

**chemistry**

5 mg iodine 131 its half life is 8.1 days what is the time when 1% remain

**PHI 103**

"Thomas Jefferson owned slaves, so slavery must have been a good idea" may commit which fallacy? A. appeal to pity B. no fallacy committed C. Appeal to falso authority D. Appeal to ignorance

**Social studies**

I need sentence verb for present.past,and future.

**Social studies**

Verbs for present. Past and future write about something you could invent. Tell how people will use your invention.some verbs you can use are invent,use,like,and name.Write at least 3 sentence, under line the verb in the sentence.

**Math**

Noah has 75cent .he gives his brother 25 cent. Now Noah has

**Math**

Problem solving Marie takes 22cent from her coin bank.Now she has 49cent left .how much did she start with?

**Marh**

Problem solving. Marie take 22cent from .now she has 49 cent left. How much money did she start with.

**Marh**

Add or subtract to solve . Teri has 42 cent. Her mom give her 19 cent .now teri has

**MATH**

Show that the direct sum of two integral domains (E and H) is never an integral domain.

**math**

(1/3)*(2/5) both of these are to the third power outside the (p) please help

**Spanish 1**

I have a textbook that has been nothing if not frustrating. Our homework is done online, and I have found mistakes in it (and I'm new at this). It is a first edition and the company refuses to fix the errors until its next edition. The text is called: Experience Spanish- U...

**Spanish 1**

The directions on this question say, "Usando los verbos de la lista, dé el mandato formal que mejor completa cada oración." My choices to choose from are: dar estar ir ser The question is: ________muchas atenciones a los invitados. I thought it was dar,...

**Spanish 1**

(Darme) a cuchara. I am supposed to replace Darme with the mandate form of the word. I replaced it with dénme, but that didn't work. What is the right form?

**Social studi**

I need verb sentence .Juno (read, reads) a letter from his grandma.

**Social studi**

I need the verb end each sentence.the boy ( send,sends)letter to his grandma.

**Chemistry**

The density of an elemental gas is 1.7824 g/L at STP. What is the molar mass of the element?

**Finance**

Calculate the value of N for which Value at Risk is twice as much as the DEAR.

**math**

Jack is twice as old as he was 5 years ago. His mother was then six times as old as he was. She is now 35 years old. how old is jack?

**Chemistry**

A balloon is floating around outside your window. The temperature outside is 39 degree celsius, and the air pressure is 0.800atm . Your neighbor, who released the balloon, tells you that he filled it with 3.10 moles of gas. What is the volume of gas inside this balloon?

**organic chemistry**

*structure of the product formed

**organic chemistry**

Give the product of the structure formed when 2-methyl-2-butene reacts with bromine in water

**Chemistry**

Kc for the reaction of hydrogen and iodine to produce hydrogen iodide, H2(g)+I2(g)f 2HI(g) is 54.3 at 430C. What will the concentrations be at equilibrium if we start with 0.240M concentrations of both H2 and I2?

**geometry**

in an isosceles triange with base angles at (0,0) and (7,0), how do I find the coordinates of the 3rd angle?

**chemistry!!**

The pH of an aqueous solution is 3.25. a. Calulate the concetration of the hydronium ions in the solution. b. Calulate the concetration of the hydroxide ions in the solution.

**Help in Chemistry!!**

You are given an aqueous solution of hydrofluoric acid. (Recall that hydrofluoric acid is a weak acid; When you are given an aqueous solution of a weak acid you always assume that the dissociation reaction of the acid in water has reached equilibrium) Predict whether the react...

**phi 103**

Logicians regard the following as the meaning of the word "argument." (Points : 1) A hostile and emotional dispute A poetic tribute to Spring A set of reasons put forth to support a claim The kind of thing one has with a spouse

**physics**

A still block slides over a still surface,if the mass of the pot is 2.00kg what is the force of friction opposing the motion?coefficient of kinetic friction is taken as 0.42.Gravity is 9.8

**math**

what is the total and annual returns on an investment of 2 years regular 3700 shares in a start up company, you sell the shares for $2300 (at a loss)

**Algebra**

A store mixes kentucky bluegrass wothe $12 per pound and chewing fescue for $12 per pound. Howe many of each should be used to make 456 pounds of mixture?

**math--i just need help getting started--PLEASE! **

Let W be the set of all continuous functions from the set of real numbers R to R. For f,g in W define f+g by (f+g)(x)=f(x)+g(x) and (f*g)(x)= f(x)g(x). Verify that W is a commutative ring. Does W have unity? Why or why not?

**algerbra**

5x/7

**physics help**

A 10 g bullet moving at 370 m/s strikes a ballistic pendulum of mass 2kg. The bullet emerges with a speed of 100 m/s. What height does the pendulum rise to? I dont want the answer, i just need hints!!! thnaks

**chemistry(reacting masses)**

When a 1 g sample of limestone was dissolved in dilute hydrochloric acid completely,0.38 g of carbon dioxide was generated.What was the percentage by mass of calcium carbonate in limestone?(Relative atomic masses : C=12, O=16,Ca=40.1)

**chemistry**

In an industrial process, the following reaction is carried out in the presence of a catalyst: C2H51 + Cl2 → C2H51Cl12 Calculate the percentage yield if 405.58 grams of C2H51 are used in the reaction and 474.91 grams of C2H51Cl12 are produced.

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