Wednesday

November 25, 2015
Total # Posts: 3,503

**Chemistry**

Each of the following processes is spontaneous as described. Which one will have ∆H approximately equal to zero? 1. precipitating 1 mol of AgBr(s) from a solution of Ag+(aq) and Br−(aq) 2. 1 L He(1 atm, 298 K) + 1 L Ar(1 atm, 298 K) → 2 L He/Ar mixture(1 atm...
*March 1, 2012*

**5th grade Math**

Insert parentheses in the false number sentence to make it true. -3+5*2-(-6)=37
*February 29, 2012*

**Algebra 2**

if one class had 20 students participating in the taste test and each student's rating is represented as ak, how do you write the formula for finding the mean rating using summation notation?
*February 29, 2012*

**Math**

Adriano. two is prime as are all the other numbers in his pattern.... hong-li wrote 6 and 6 can be divided by 2 and 3 therefore not prime. Latrell wrote 9 and that can be divided by 3 so 9 is not prime.
*February 29, 2012*

**bio**

In 3 or more sentences describe the structure of a water molecule and its unique properties
*February 29, 2012*

**HIS/115**

Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?
*February 29, 2012*

**US HISTORY**

Why did prohibition take place in mostly rural areas.
*February 28, 2012*

**Math for Liberal Arts Major**

Find the solution set for the following inequality: x+1>1/2x-11
*February 27, 2012*

**maths**

Given that the equation of the parabola is 5y^2 + 24x = 0. Find (1)The Axis and vertex of the parabola (ii)The focus and the directrix (iii)The distance from the directrix to the focus
*February 27, 2012*

**KNOWLEDGE**

Indian movie that won oscar
*February 25, 2012*

**health**

patricia had a car crash while she was on her way to work one morning.she was badly injured and needed to have an arm amputated.explain three effects that patricias physical disability may have on her self-concept.patricias husband,andy is a teacher.explain three ways that ...
*February 25, 2012*

**social work**

What are some of the issues that need to be addressed in the hiring of competent staff in working with people with disabilities? I am only finding information about employing those with disabilities. How do I phrase this question to Google or ideas where to look?
*February 22, 2012*

**pos/110**

civil liberties:currently do we need more or less protection of this liberty in contemporary American society
*February 21, 2012*

**Physics**

A block is suspended from the end of a spring. An external force holds the block so that initially the spring is not stretched or compressed. When the block is released, it oscillates up and down between positions A and B. If the mass of the block is 0.5 kg and the spring ...
*February 20, 2012*

**PH103**

Truth tables can a. display all the possible truth value involved with a set of sentences. b.determine what scientific claims are true. c.determine if inductive arguments are strong. d.determine if inductive arguments are weak.
*February 19, 2012*

**Physics**

What is the truth value of the sentence "Pv~P" A. True B. False C. Cannot be determined D. Not a sentence
*February 19, 2012*

**Calculas**

Find any critical numbers of the function. (Enter your answers as a comma-separated list.) g(t) = t sqrt6 − t , t < 13/3 I don't even know how to start out!
*February 19, 2012*

**AP CHEMISTRY**

Write the formula for each of the following compounds, being sure to use brackets to indicate the coordination sphere. A) bis(bipyridyl)cadmium(II) chloride B)potassium tetrabromo(ortho-phenanthroline)- cobaltate(III)
*February 18, 2012*

**AP CHEMISTRY**

Calculate [OH-] and pH for the following strong base solution; a solution formed by mixing 10.0 mL of 0.011 M Ba(OH)2 with 28.0 mL of 7.4 10-3 M NaOH working and answer would be appreciated
*February 18, 2012*

**algebra**

solve square root of y+5-1=2
*February 18, 2012*

**Physics**

An electron and a proton are each placed at rest in an electric ﬁeld of 363 N/C. What is the velocity of the electron 76.1 ns after being released? Consider the direction parallel to the ﬁeld to be positive. The elementary charge is 1.60218 × 10 −19 C...
*February 17, 2012*

**algebra**

4 less than d
*February 17, 2012*

**math**

4x-y=3 4x+y=1 show work and explain
*February 16, 2012*

**AP CHEMISTRY**

An unknown salt is either KBr, NH4Cl, KCN, or K2CO3. If a 0.100 M solution of the salt is neutral, what is the identity of the salt?
*February 16, 2012*

**math**

its 1 times 6, not 16
*February 16, 2012*

**math**

is it multiply or is it x? if its multiply i think its p16
*February 16, 2012*

**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
*February 16, 2012*

**AP CHEMISTRY**

THANX
*February 16, 2012*

**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.
*February 16, 2012*

**james giles math**

is that it?
*February 15, 2012*

**managerial accounting**

40%
*February 15, 2012*

**math**

how can i make a fraction into a pound
*February 14, 2012*

**math**

i tried to simplify 10/8 i got the answer of is 2/4 am i correct
*February 14, 2012*

**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?
*February 14, 2012*

**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
*February 13, 2012*

**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.
*February 13, 2012*

**Math**

Please show me how to set and solve: The sum of two numbers is 90. Their difference is 12. What are the numbers?
*February 13, 2012*

**amer lit **

how does the song dirty little secrets by the all american rejects apply to the scarlet letter
*February 12, 2012*

**math please help**

determine the domain of the real valued function f(x) = sqrt(5 - (sqrtx))
*February 12, 2012*

**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
*February 12, 2012*

**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.
*February 12, 2012*

**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 ...
*February 11, 2012*

**math**

correction!!! f(x) = sqrt( 5 -(sqrt x))
*February 10, 2012*

**math**

determine the domain of the real valued function f(x) = sqrt(5 - (sqrt5))
*February 10, 2012*

**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
*February 10, 2012*

**physics**

need help with this question does anyone know the answer
*February 10, 2012*

**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
*February 9, 2012*

**Chemistry**

How much water, in grams, can be made from 3.59 × 10^24 hydrogen molecules? Answer in units of g
*February 9, 2012*

**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.
*February 9, 2012*

**Math**

If a line is measured as 1 4/8 inches how would simplify measurement
*February 8, 2012*

**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???
*February 8, 2012*

**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?
*February 5, 2012*

**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
*February 5, 2012*

**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 ...
*February 4, 2012*

**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...
*February 3, 2012*

**english**

Object pronouns include you, she, he, it, and we. True False
*February 2, 2012*

**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)...
*January 31, 2012*

**math**

x/60=30/100 cross multiply to solve for x.
*January 31, 2012*

**chemistry**

The Ka value for HCN is 4.9x10^-10. What is the value of Kb for CN-?
*January 31, 2012*

**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.
*January 31, 2012*

**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.
*January 31, 2012*

**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.
*January 31, 2012*

**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.
*January 31, 2012*

**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 ...
*January 27, 2012*

**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.
*January 27, 2012*

**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 ...
*January 26, 2012*

**calculus**

Find f'(a). f(t) = t^4 − 7t
*January 26, 2012*

**Math**

Reasoning What is the greatest number you can make using these digits? 572. ..... 257 572 725 752
*January 26, 2012*

**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.
*January 26, 2012*

**Business English**

your application will be processed by next Thursday
*January 25, 2012*

**chemistry**

Air is 20.9% oxygen by volume.How many mL of air contains 175 mL of oxygen?
*January 25, 2012*

**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?
*January 22, 2012*

**math**

How can I figure out the the estimate the diffrence between 53 and 37?
*January 19, 2012*

**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 ...
*January 19, 2012*

**science**

what helps a camel walk on sand?
*January 18, 2012*

**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?
*January 17, 2012*

**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?
*January 17, 2012*

**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?
*January 16, 2012*

**Compounded monthly**

P - Po(1 + r/n)nt P = $10,000 r = 6.5% n = 12 t = 216MO
*January 16, 2012*

**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
*January 16, 2012*

**business studies**

why do we study shorthand.
*January 11, 2012*

**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
*January 7, 2012*

**ap chemistry**

what is the pH of 2.50M HF (aq)? Ka=7.2X10^-4
*January 6, 2012*

**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:
*January 3, 2012*

**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...
*January 3, 2012*

**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?
*January 3, 2012*

**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.
*January 3, 2012*

**english**

I take a considerable amount of time on my English course, because it is difficult to write and research topics.
*January 3, 2012*

**science 7th grade**

calculated error. id go back and check if i were you.
*January 2, 2012*

**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 ...
*December 25, 2011*

**chemistry**

5 mg iodine 131 its half life is 8.1 days what is the time when 1% remain
*December 23, 2011*

**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
*December 15, 2011*

**Social studies**

I need sentence verb for present.past,and future.
*December 14, 2011*

**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.
*December 14, 2011*

**Math**

Noah has 75cent .he gives his brother 25 cent. Now Noah has
*December 13, 2011*

**Math**

Problem solving Marie takes 22cent from her coin bank.Now she has 49cent left .how much did she start with?
*December 13, 2011*

**Marh**

Problem solving. Marie take 22cent from .now she has 49 cent left. How much money did she start with.
*December 13, 2011*

**Marh**

Add or subtract to solve . Teri has 42 cent. Her mom give her 19 cent .now teri has
*December 13, 2011*

**MATH**

Show that the direct sum of two integral domains (E and H) is never an integral domain.
*December 13, 2011*

**math**

(1/3)*(2/5) both of these are to the third power outside the (p) please help
*December 11, 2011*