Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 1,022

**Chemistry**

Given that the structures of cocaine (on the right side of the equation) and its free base ( on the left side) with an H+ : a. Would you expect K for the cocaine to be greater or less than 1.0? Explain. b. Would K for the free base be higher or lower than for cocaine? Explain....

**CHEMISTRY**

Given that the structures of cocaine (on the right side of the equation) and its free base ( on the left side) with an H+ : a. Would you expect K for the cocaine to be greater or less than 1.0? Explain. b. Would K for the free base be higher or lower than for cocaine? Explain....

**college algebra**

whats the question?

**Math**

my keyboard is not that advanced :(

**Math**

Simplify! 3x^5 over 15x A. x^4 over 5 B. 1/5 C. x^6 over 5 D. x^5 over 5 thank you!

**Math**

simplify! r^2s^5t^4 over (like a fraction) r^2s^2t^5 A. S^3 over t^2 B. S^3 over t C. S^2 over t^3 D. S over t ** a letter with -- ^ means to that power** thank you!

**BIOLOGY**

how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve

**Biology**

how would i find the osmotic pressure of something from "0.9% NaCl solution and MW is 58 grams" .. ? is there a formula or some sort i am missing? if so can you tell me what that is cause i have several problems like these that i don't know how to solve

**MATH**

Which expression is a polynomial???? A: 11 0ver the square root of x B: square root of 11 times x C: x - square root 11 D: 11 over the square root of x to the 2nd power (sorry I am not sure how to insert square root symbols or fractions, so u have to imaging its there) thank y...

**CHEM ABSTRACT**

ok thank you!

**CHEM ABSTRACT**

thank you! quick question, the link you provided mentioned to keep the methods section of the abstrast to about 2 sentences, but i had to do 6 experiments for it, do i have to fit all 6 different methods in the two sentences or would it be more like one sentence for each of th...

**CHEM ABSTRACT**

I need to write an abstract for my chemistry lab for identifying an unknown acid, is there a generic list of what to do for an abstract? because mine are always to long

**Chemistry**

This compound is mescaline, a hallucinogen. Which of the following statements is true? Mescaline is an amine. Mescaline contains an alcohol group. Mescaline is a carboxylic acid. Mescaline is an amine and contains an alcohol group.

**chemistry**

Sometimes the basicity of a solution is reported using pOH (pOH = -log[OH-]). What is the a. [OH-] if pOH = 1.90 b. [H3O+] if pOH = 12.94 c. pH if pOH = 9.70

**chemistry**

It requires 23.2 mL of 0.250 M KOH to titrate 49.0 mL of an HCl solution of unknown concentration. Calculate the initial HCl concentration.

**Chemistry**

It is commonly known that freshly cut fruits turn a brownish color when exposed to the air for a number of minutes. This is due to the action of the enzyme polyphenoloxidase. It is also well known that the formation of the brown color can be prevented or slowed by chilling the...

**Chem**

a)Pv=nRT 1mol(.0821)(288.15)/1atm=23.7L 1mol(.0821)(303.15).1atm=24.9L b)E=3/2nRT 1mol(8.314R)(303.15-288.15)=187J

**Chem**

A balloonist is preparing to make a trip in a helium-filled balloon. The trip begins in early morning at a temperature of 15 degrees C. By midafternoon, the temperature has increased to 30. degrees C. Assuming the pressure remains constant at 1.00atm, for each mole of helium, ...

**Chemistry**

Express the concentration of a commercial hydrogen peroxide solution, which is 3.0 (w/w), as a molarity. Show all work

**math**

If X varies inversely with Y and X=8 when Y= 10, find Y when X=6 Answer choices are A: y= 3/20 B: y= 4.8 C: y= 7.5 D: y= 40/3

**Math**

How do you find the coordinates to graph y=x2+2x-3

**social studies**

we are working on ancient egypt and i cant find the answer to In what ways were the reigns of Akhenaton and Ramses II different

**algebra**

A math tutoring service opened for their first year open, it had 5 students. If 3 new students enroll each year, which of the following equations represents how many students will be enrolled in x years? answer choices: A: y = 5x - 3 B: y = 5x + 3 C: y = 3x + 5 D: y = 3x - 5

**accounting**

Uncollectible Accounts—Percentage of Sales Ryan's Express has total credit sales for the year of $178,000 and estimates that 3% of its credit sales will be uncollectible. Record the end-of-period adjusting entry on December 31, in general journal form, for the estimat...

**math(algebra)**

A small college opened in 1999. In the linear model below, x represents the number of years after 1999, and y represents the student population. Interpret the slope. y = 576 + 173x Answer choices are::: A: An additional year of the college being open is associated with an addi...

**MATH**

SIMPLIFY. 4 TO THE 4TH POWER TIMES 4 TO THE 2ND POWER.

**accounting**

A light truck is purchased on January 1 at a cost of $27,000. It is expected to serve for eight years and have a salvage value of $3,000. Calculate the depreciation expense for the first and third years of the truck's life using the following methods. If required, round yo...

**accounting**

Based on the financial statements for Jackson Enterprises (income statement, statement of owner's equity, and balance sheet) shown below, prepare the following financial ratios. All sales are credit sales. The Accounts Receivable balance on January 1, 20--, was $21,600. As...

**Physics.**

From greatest to least, rank the accelerations of the boxes. C. <-5N--|3kg|--16N-> B. <-8N--|4kg|--16N-> A. <-4N--|5kg|--8N--> D. <-2N--|20kg|--20->

**West Chester University**

Physics.

**West Chester University**

From greatest to least, rank the accelerations of the boxes. C. <-5N--|3kg|--16N-> B. <-8N--|4kg|--16N-> A. <-4N--|5kg|--8N--> D. <-2N--|20kg|--20->

**history**

My next guess is A. Would that be correct?

**world history**

Which technologies have been pivotal in the development of the Information Age? To what extent did the industrial revolution create the foundation for modern technologies?

**Math**

Kayla had 441 stamps.She lost 3/7 of them. How many stamps did she have left?

**Calculus 3**

Find the center of the ellipsoid x^2+4y+2z^2+2x-4y+z = 20 I'm having trouble factoring to get the center points. Can someone please help. This is where I'm stuck. (x^2+2x+1)+4(y^2-y+1/4)+2(x^2+1/2z+1/16)=20+1+1+1/8 (x+1)^2+ Now I don't know how to get the y and z p...

**Chemistry**

what if you were mixing two different solutions? such as .9% of the NaCl solution and a 5% dextrose solution? would you just find the moles of both like the above and add them together? then divide all of it by the L?

**Chemistry**

I'm doing something wrong with osmolarity. I have 100 ml of .9% NaCl. So what i did was take the MW (58.44) and divided it by the .9 because it should be grams, then divided that number by .1 (for the liters) but its coming out with a huge number and its not supposed to. I...

**Chemistry**

Aspirin, C9H8O4 , is produced through the following reaction of salicylic acid, C7H6O3, and acetic anhydride, C4H6O3: C7H6O3(s) + C4H6O3(l) ---> C9H8O4(s) + HC2H3O2(l) A. What mass of aspirin (kg) could be produced from 75.0 mol of salicylic acid? B. What mass of acetic anh...

**Chemistry**

If you total sample mass was 1.50 g, and you determined that 0.95 g were KHCO3, what was the percent mass off the KHCO3 in the sample?

**music**

I'm scared she might get mad so I need someones opinion should i pick him or another rock star?

**music**

Ok thanks but someone told me he worshipped satan so do u think my teacher would get mad?

**music**

In class I have to write a report on a music star so I chose marylin manson can someone tell me about him?

**Science**

Which of the following is disadvantage of internal fertilization? A. Gametes are released into the surroundings. B. Gametes may get washed away. C. The developing zygote is protected. D. Larger numbers of eggs can be fertilized at one time

**Science**

Ok i hope I'm not being rude by saying this but why do u think that because I think the answer is C so I wanna compare our reasons XD

**Science**

Which of the following is disadvantage of internal fertilization? A. Gametes are released into the surroundings. B. Gametes may get washed away. C. The developing zygote is protected. D. Larger numbers of eggs can be fertilized at one time.

**Science**

Ok I have one more question and it is the same as this one but instead of external its internal? And the answers are the same as well like the question.

**Science**

I think B.

**Science**

Which of the following is disadvantage of external fertilization? A. Gametes are released into the surroundings. B. Gametes may get washed away. C. The developing zygote is protected. D. Larger numbers of eggs can be fertilized at one time.

**Science**

Thanks I have another questions to :)

**Science**

A male peacock displays his colorful tail in order to...... A. increase the success rate of asexual reproduction B. increase the gestation period. C. release gametes into his surroundings D. attract a mate

**Science**

A male peacock displays his colorful tail in order to...... A. increase the success rate of asexual reproduction B. increase the gestation period. C. release gametes into his surroundings D. attract a mate

**Science**

I have another questions in science if someone is willing to help me

**Science**

Ok sorry

**Science**

Please help me!

**Science**

Seahorses change color and swim together in predetermined ways before mating. The behaviors are called....... A.asexual reproduction. B. sexual reproduction. C. courtship rituals. D. budding.

**Physical Science**

Can someone help me =.=

**Physical Science**

1) Carbon dioxide is obtain from the air and changed into carbohydrates oxygen during the process of fossilization. respiration. digestion. photosynthesis. 2) Which sequence of processes must occur for an atom of carbon to go from car to tree? respiration, decomposition. combu...

**math**

2 ones, 48 tenths and 5 hundreds =

**math**

quadrilateral RSTU has vertices R(-6,-3), S(3,3), and T(4,-1). what are the coordinates of vertex U if RSTU is a parallelogram?

**Math**

A client comes to you for investment advice on his $500,000 winnings from the lottery. He has been offered the following options by three different financial institutions and requests assistance to help understand which option would be the best for his investment. •Optio...

**math**

A client comes to you for investment advice on his $500,000 winnings from the lottery. He has been offered the following options by three different financial institutions and requests assistance to help understand which option would be the best for his investment. •Optio...

**Healthcare Statistic**

true

**math**

how do i solve function tables?

**math**

Identify the solution(s) of the system of equations, if any. 2x+5y=10, y=2-x

**Algebra**

Remove the parentheses from the following expression, and combine like terms: 3(ax + b2 – c) + 2 22 A. –3(ax – b2 + 3c – 6 B. 3ax +3b2 – 3c + 2 C. 3(ax + 3b2 – 3c + 6 D. (ax + b2 – c + 5

**physics **

a 36 kg child slides down a slide at a height of 2.5 m at at velocity of 3 m/s. how much energy was transferred by friction as she slid down the slide?

**Earth Science**

THANKS !

**Earth Science **

do you think that the earthquake that affected japan should have a impact on the nuclear issues for the united states ? DONT UNDERSTAND THIS QUESTION AT ALL !

**Chemistry**

never mind I figured it out!! hydrogen peroxide, so it breaks down to water and O2 and seeing the bubbles proves that the actual reaction occurred

**Chemistry**

what is important about oxygen being formed during a titration?? (formed in container after it has been titrated not in the burette)

**Geometry**

Find the measure of angle DBC. D=X^2+1 A=2x+3x-2 C=4x+3 This is the only question I do not know for my homework ,I just don't understand it. PLEASEE Explain Step By Step .

**meterology**

Saturated (cloudy) air at a temperature of 20 °C (68 °F) has a relative humidity of _________%

**Physics**

A police radar has an effective range of 1.0 km, and a motorist's radar detector has a range of 1.9 km. The motorist is going 100km/h in a 80km/h zone when the radar detector beeps. At what rate must the motorist decelerate to avoid a speeding ticket?

**Health**

Is it "c"??

**Business English **

Investors and their wives" is considered sexist because:

**pllzzz**

i rlly need this question answered cuz i have to get these problems done i dont mean to be pushy

**math**

A rectangle has a perimeter of 42 cm. One of its sides is 11 cm long. What are the demensions of the rectangle??

**chemistry 2**

Calculate the relative concentrations of o-ethylbenzoic acid (pKa 3.79) and potassium o-ethylbenzoate that are needed to prepare a pH 4.0 buffer I know to set up hassle equation but when i get .21=log[a-/ha] i get lost because i was not given concentrations .. please help expl...

**Calculus Grade 12**

Find the equation of the plane that passes through the point (3,7,-1) and is perpendicular to the line of intersection of the planes x-y-2z+3=0 and 3x-2y+z+5=0

**economics**

explain how a us citizen whose income is in the top one percent would talk about scarcity

**economics**

explain how a us citizen whose income is in the top one percent would talk about scarcity

**Algebra**

The length of a rectangle is (x+2) inches. The width of the rectangle is (x+1) inches. Write an equation that can be used to determine the area (A) of the rectangle in terms of x. What is the value of x if the area of the rectangle is 56 square inches?

**Algebra**

Jan is a photographer. She earns $42.50 for each picture she sells. It costs Jan $850.00 per month to maintain her photography lab. Write an equation that represents the relationship between Jan's monthly profit (P) and the number of pictures (x) she sells. What does the x...

**Algebra**

The perimeter of a rectangular garden is 35 feet. The length of the garden is 1 foot more than 2 times its width. Write an equation to represent the perimeter of the garden in terms of its width (w). What are the length and width of the garden in feet?

**language**

I know there both authors :)

**L.A**

Anyone know anything?

**language**

I'm not sure because I need the answers to :) but if you find out anything let me know =)

**english**

1. Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out here alone...

**Math**

The area of a rectangular garden is 110 square meters. The width is 6 meters loner than one-half of the length. Find the length and the width using area=lengthxwidth

**English**

1. A. 2. B.

**English**

i think the first one is B. but i'm not really sure. 2. i think is A.

**English**

1.) We hung makeshift curtains in our room using (1point) A. Bed sheets. B. Old Curtains. C. New Curtains. 2.) Which of the sentences below is punctuated correctly? A. I opened the door and my cat ran outside. B. I opened the door, and my cat ran outside. C. I opened the door,...

**chemistry**

interpret the following balanced equation into Particles, Moles, Mass: 2Al+3CuSO4== AL2(SO4)3+ 3Cu

**physics**

The period of the musical node E0 is 4.85 × 10-2 seconds. What is the frequency of this note?

**english**

should religious phares be taken out of money for a reasearch paper

**physics**

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is .90

**Math**

If you deposit P dollars into a bank account paying an annual interest rate r, with n interest payments each year, the amount A you would have after t years is A=P(1+r/n)^nt. Kevin places $100 in a savings account earning 6% annual interest, compound quarterly. If Kevin adds n...

**calculus **

Find a formula for the fourth degree polynomial p(x) whose graph is symmetric about the y-axis, and which has a y-intercept of 4, and global maxima at (1,6) and(-1,6).

**I would like to understand my calc homework:/**

I think the whole non panicing ship sailed a long time ago haha. Sorry and thanks for the help!

**I would like to understand my calc homework:/**

Consider the differential equation given by dy/dx=(xy)/(2) A) sketch a slope field (I already did this) B) let f be the function that satisfies the given fifferential equation for the tangent line to the curve y=f(x) through the point (1,1). Then use your tangent line equation...

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