# Questions Asked onMarch 11, 2012

1. ## Chemistry Help! Thank you :)

Assuming the final solution will be diluted to 1.00 , how much more should you add to achieve the desired pH? Information: Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.80. You have in front of you: 100 ml of

2. ## Programming

Write a program (pseudocode) that would calculate and display the results for the multiplication table for values ranging from 1 to 100. This what I have so far: Declare X, Y, Z As Integer Write “10 x 10 Multiplication Table” For (X = 1; X

3. ## chemistry

Ammonium bisulfide, NH2HS, forms ammonia NH3, and hydrogen sulfide, H2S through the reaction: NH4HS (s) NH3(g) + H2S(g) Kp value of .120 at 25C in a 5L flask is charged with .300g of H2S at 25C. A) What are the partial pressures of NH3 and H2S at

4. ## calculus

Which of the following are antiderivatives of f(x)=sinxcosx? I f(x)=(sin^2* x)/2 II f(x)=(cos^2* x)/2 III f(x)=-cos(2x)/4

5. ## organic chem

when di-n butyl ether and hot concentrated naoh react----> nor rxn .. why? when di n butyl ether reacts with na metal---> nor reaction .. why?

6. ## accounting URGENT HELP DUE IN 1HR

(a) Fill in the missing amounts. (If answer is zero, please enter 0. Do not leave any fields blank.) Account Titles Trial Balance Adjusted Trial Balance Dr. Cr. Dr. Cr. Accounts Receivable 34,000 Prepaid Insurance 26,000 20,000 Supplies 7,000 Accumulated

7. ## physics

A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3000 N/m. The block slides down the ramp and compresses the

8. ## Physics

a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with

57. ## Chemistry

For the ionization of phenylacetic acid, Hc8H7O2 +H20 C8H7O2- (aq) + H3o+ (aq) Ka + 4.9x10^-5 What is the concentration of the phenylacetic ion, C8H702,- in 0.186 M phenylacetic acid, HC8H702? Please explain the steps as well..thank you so much

58. ## physics

A 50.2 kg child slides down a water slide with a velocity of 1.1 m/sec at the top. At the bottom of the slide, she is moving horizontally, 1.5 meters above the water. She splashes into the water 2.5 meters to the right of the bottom of the slide. a)

59. ## Math

Suppose that z is inversely proportional to y and that z=12 when y=16. Write an equation that expresses z in terms of y.

60. ## math

Each cube below is made up of smaller cubes, but the large cubes are not solid. They had tunnels through them. • The first cube originally had 27 small cubes, but the tunnel removed 3 cubes. • The second cube originally had 64 small cubes, but two

86. ## Chemistry

Draw a titration curce of 25.0 mL of 0.100 M aluminum ion (pKa=5.14) with 0.100 M NaOH. I am familiar with the process of drawing titration curves, however, I have never done an example with an ion (aluminum ion) rather than an actual acid. If anyone can

87. ## calculus

Determine whether the statement is true or false. If it is true, explain why it is true. If it is false, give an example to show why it is false. a- if f is a function of x and y and a is a real number, then f(ax, ay)= af(x,y). b- if fx(a,b) < 0, then f is

Assignment Choose a company that has experienced negative press recently about its financial dealings. Provide a financial summary of your selected company’s financial health, including a timeline of possible financial gains and losses. Define 2

89. ## Chemistry

Determine the atomic weight of X in the following compounds a)8g XH4 occupy 44.8L volume at 237C and 380 mmHg pressure b)1.92g of X3 occupis a volume of 574 ml at 77C and 2 atm c)A O.326 gram of gas,C3X4 has a volume of 250 ml at100C and 76 cmHg d)A 3.12

90. ## Chemistry

A gas occupied 870 ml under a pressure of 720 mmHg at a temperature of 17C ,the next day it was measured under a pressure 0f 750 mmHg at a temperature of 21C.what volume did the gas occupy under these condition

91. ## Chemistry

How many mL of concentrated HCl (aq) (36.0% HCl by mass, d=1.18 g/mL are required to produce 5.00 L of a solution with a pH =2.10?

92. ## calculus

a)find the first partial derivatives of f(x y)= x √1+y^2 b)find the first partial derivatives of f(x,y)= e^x ln y at the point (0,e)

93. ## chemistry

3. Find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is 20.2 % by mass. 4. A sample contains 71.65% CL, 24.27% C nad 4.07% H. the molecular weight is known to be 98.96 g/mol. What are the empirical and

94. ## math

What inverse operation is needed for the first step in solving the equation 12+5x=22? a. addition b. subtraction c> multiplication d. division

95. ## Chemistry

Consider a solution containing 0.150 M Ba(OH)2. Calulate the pH.

96. ## Physics

A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0e6N and a direction opposite to the probe's motion. It

n [1.70E-2] = ln(0.144) - (k s-1)(3609 s) Solve for k. I have a TI30 calculator. Am I suppose to press just the ln button or do I have to press 2nd and then ln??

98. ## Math

x^3-6x^2+17x Find the point of inflection of the graph of the function? x,y ( , ) I tried to solve for it by getting the 1st derivative and setting it equal to 0 but i get sqrt,so am confused!

99. ## physics

An automobile tire has a radius of 0.455 m, and its center moves forward with a linear speed of v = 15.7 m/s. Determine the angular speed of the wheel.

100. ## Lost in the pits of ALG

I have 5 problems I seem to not be able to comprehend out of 150 that are due Tuesday. I have tried every which way to solve them on my own..please help. Find the variation constant in which y varies inversely as x, and the following condition exists. Y=30

101. ## math

sasha has 5 red pens and 4 blue pens in her bag. she will randomly pick one pen, keep it, and then randomly pick a second pen. What is the probability that she will pick two blue pens

102. ## English

I really need to know if everything is correct in my last post. I hope someone can check it. Thank you very much, Damon. Here are a few more sentences I need to check.In particular, a need to know which word choices are possible. 1) O’Brien even

103. ## Chemistry

How many mL of 5.5 M KOH are needed to prepare 300 mL of 1.2 M NaOH?

104. ## CHEMISTRY

How many grams of dry need to be added to 1.90 of a 0.800 solution of ammonia, , to prepare a buffer solution that has a of 9.00? Kb for ammonia is 1.8*10^-5.

105. ## Math

ln [1.70E-2] = ln(0.144) - (k s-1)(3609 s) Solve for k. I have a TI30 calculator. Am I suppose to press just the ln button or do I have to press 2nd and then ln??

106. ## maths

simplify 48x(14+x)=16(x+14)

107. ## calculus: related rates

hello, please help me. A cylindrical can is being heated with its height increasing at the rate of 0.01cm/min and its diameter at the rate of 0.005cm/min. At what rate is the volume increasing when the can has a diameter of 15cm and a height of 20cm. this

108. ## ALGEBRA

An alligators tail length,T varies directly from its body length B. So an alligator with a body length of 7.7 feet has a tail length of 6.3 feet. What is the tail length of an alligator whose body length is 4.4 feet? Thanks ahead of time.

109. ## World geography

Imagine you are a farmer in an area that has monsoons. What would you need to do to adjust your crops or your farming techniques to account for this massive rainfall? How can you protect your crops during the dry winter months?

110. ## calc

f(x)=[5x^3-4x^2-8x+9]/[2x^2-1x-3] Find the equation of the non-vertical asymptote. y = Does f(x) intersect its non-vertical asymptote? (yes or no) What is the smallest value of x at which f(x) intersects its non-vertical asymptote? ( Enter No in the

111. ## physics

A small block of mass m = 1.1 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 56.0 m above the bottom of the loop of radius R = 17.0 m. What is the kinetic energy of the mass at the point A

112. ## math

sasha has 5 red pens and 4 blue pens in her bag. she will randomly pick one pen, keep it, and then randomly pick a second pen. What is the probability that she will pick two blue pens

113. ## trig

City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?

114. ## life orientation

What is media

115. ## chemistry

what has the strongest bond? a) C2H6, C2H4, C2H2 b) Cl2, O2, N2 c) H2, Cl2

116. ## Physics

The electric field between the plates of a paper-separated (K = 3.75) capacitor is 9.01X10^4 V/m. The plates are 1.95 mm apart and the charge on each plate is 0.775 µC. I figured out that the capacitance is 4.4e-9F but I need help finding the area.

117. ## Biology

Why does the pCO2 value increase during hypoventilation? If hypoventilation causes shortness of breath, would that not increase the CO2 concentration, therefore decreasing pCO2? What am I understanding incorrectly?

118. ## math

Melinda discovered that she took 26 heel-to-toe steps to walk in a straight line from the center of her circular garden to any point on the outer edge of the garden. How many heel-to-toe steps is the diameter of Melinda's garden?

119. ## Chemistry

My chemistry teacher said that the pCO2 value increases during hypoventilation. Why is that? If hypoventilation causes shortness of breath, would that not increase the CO2 concentration, therefore decreasing pCO2? Because if you think about pH, a larger H

120. ## physics

Consider a system of N identical particles. Each particle has two energy levels: a ground state with energy 0, and an upper level with energy . The upper level is four-fold degenerate (i.e., there are four excited states with the same energy ). (a) Write

121. ## Math

Express the following number in scientific notation: 23^941 How do i get the answer for this? on my graphing calc, i get an error overflow messasge when i try to compute it. THANK YOU!!!!!

122. ## Calc

f(x)=x^3-3x^2-3x-8/(-3x^2-4x-6) Find the equation of the non-vertical asymptote. What is the smallest value of x at which f(x) intersects its non-vertical asymptote?

123. ## US History

Why did many progressives of both major parties saw American entry into World War I as a peerless opportunity? Many Progressives during the First World War, Republican and Democrat alike, realized something of great importance to furthering their goals:

124. ## Math

29 * 6^(-3x) = 13 Thanks!

125. ## physics

An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.11 x 105 m/s to a final velocity of 1.67 x 106 m/s while traveling a distance of

126. ## Physics

A space explorer is 4.6 billion km away from a certain star, and observes that the gravitational force of attraction exerted on the spacecraft by the star is 500 N. What will the force become when the craft has approached to a position 2 billion km from

127. ## english

is this a good thesis for and english research paper? With so many illegal drugs and alcohol cigarettes seem to be the only drug that is not illegal but kills more people each year who smoke.

128. ## calculus

Find the area of the region bounded by the graph of y^3=x^3 and the chord joining the points (-1, 1) and (8,

129. ## algebra

a ladder is leaning up against a wall. The ladder is 8 feet long and is 3 feet away from the base of the wall. find the angle the ladder makes with the wall.

130. ## HCS/490

Identify two key health care-related challenges to this population such as increaes in health care costs, increases in presvription drug costs or the need for in-home medical care,

131. ## English

I need help writing a thesis sentence for an analytical essay about Romeo and Juliet. The topic the teacher chose is "Romeo and Juliet face untimely deaths because they act recklessly and hastily. thanks!

132. ## Biology

can anyone send me a website link to a Monocot and Dicot Leaf and Stem cells under a microscope? (not cross section) Also, do they both have a cell nucleus?

133. ## Pre-Calculus Help, thanks:)

Find the domain of f(x) = 1/ (square root 2x^2-7x-15) I tried setting 2x^2-7x-15 greater or equal to zero but I don't know where to go from there to solve for my domain. Help please!:)

134. ## Calculus; Limits

The percentage of research articles in a prominent journal written by researchers in the United States can be modeled by A(t) = 26 + (36/1 + 0.8(0.8)^−t'), where t is time in years (t = 0 represents 1983). Numerically estimate lim as t→+infinity A(t).

217. ## American History

In the southern campaign launched by the British, Cornwallis lost a battle with the Americans under Nathaniel Greene at

As a growing number of producers pursue multichannel distribution, they could probably learn some lessons from the masters at the game—the big soda companies. Think of all the places in your community where you can purchase a Coke or a Pepsi. How is the

219. ## math

there are 7 identical spheres each colored on the inside with one color in more than 4 of them. When 2 spheres of the same color touch each other they both glow in color. Using as few comparisons as possible, find a single spehere that has the majority

220. ## math problems

If you cut a pizza into 45 degree wedges meeting at a point other than the center and two people eat alternative slices, do they each get the same amount?

221. ## math

In a clinical trial, a drug used to reduce blood pressure caused side effects in 6% of the patients who took it. For a new rial, two patients were selected at random. Find the probability that both the patients had side effects.

222. ## Chemistry

Calculte the amount BTU that would be lost to cool 587lbs of water from 87 degrees F to 49 degrees F.

223. ## Math

I asked this question before sorry I I shouldn't ask it again. Express the following number in scientific notation: 23^941 How do i get the answer for this? on my graphing calc, i get an error overflow messasge when i try to compute it. what is the decimal

224. ## english

what are some connotations of Hawaii?

225. ## English

Ms Sue or Damon, as Writeacher is on vacation, I really hope you can check my today's post. I still have a few other sentences.It is extremely urgent!!! 1) To be honest, I had never heard of Derek Landy, but I found out, to my surprise, that he is a

226. ## communication

Which of the following is NOT true of nonverbal communication? A.It is continuous. B.It uses a single channel. C.It usually can be controlled. D. It is unstructured and follows few rules. I think it is A. But not to sure

227. ## calculus

2. Sketch the region in the first quadrant that is bounded by the graphs of y=x^3, y=4X , and 2x+y-3=0 that lies below both straight lines. Find the area of this region. I can see the graph in front of me. which function do I subtract from which?

228. ## Life orintion

Explain three checks and balances that are in place south africa that control and regulate madia

229. ## Math need help

y= sqrt(81-x^2) What length and width should the rectangle have so that its area is a maximum? (smaller value) (larger value) I have no clue how to do this, so if someone could please help! thank you

230. ## Life orintion

Explain three checks and balances that are in place south africa that control and regulate madia

231. ## Physics-is this correct?

A person heats up a can of soup on a stove. If he does 250 joules of work on the soup by stirring it as the burner adds 1675 joules of heat, what is the change in its internal energy? I took 1675j - 250 j = 1425j

232. ## astronomy

Suppose that the gravitational time dilation on the surface of a star is 1.1. What would be the escape velocity from the star?

233. ## Math

adam has 2 yards of fabric to make a shirt. He needs 1 foot of fabric for each arm and 3 feet of fabric for the rest of the shirt. Does he need an estimate or exact answer to decide if he has enough fabric?

234. ## A&P II

I have 2 problems/questions I am unsure of the answers. The first one is "how would you demonstrate the Valsalve maneuver using the model lung?" and 2. If a woman is breathing rapidly and deeply after exercise, would TLC, RV, TV, IRV, and ERV stay the

235. ## science

How do I find oxidation numbers of certain elements in compounds? I'm really confused so very simple terms would be appreciated. EX: What is the oxidation number of sodium in NaOH???

236. ## calculus

Find the area of the region bounded by the graph of y^3=x^3 and the chord joining the points (-1, 1) and (8,4)

237. ## sociology

Explain the three steps for measuring a variable.

238. ## Chemistry

What is another way to test for hydrogen and oxygen; other than the burning splint test? My teacher gave us the hint of- Universal Indicator

239. ## Pre-Calculus

A town has a population which is growing linearly. In 1970 its population was 36,000 while in 1985 its population was 63,000. Find a formula for its population P(t), where t=0 corresponds to the year 1970.

240. ## Pre-Calculus

Find the maximum value, and where it occurs for eAch function. G(x)= (square root -x^2+4x+12)

241. ## math

Transform the equation by completing the square: 4x^2 + y^2 - 8x + 6y -3 =0

242. ## Physics

Use the first law of thermodynamics to determine the amount of heat change, Q, and whther it was added to or removd from the system. W=225J Delta U=600J Q=?

243. ## Environmental Science

David Hassenzahl discusses the relative risks of eating peanut butter contaminated with aflatoxin and apple juice contaminated with UDMH, a degradation product of Alar, in the Power Point presentation in the Week Five, Module 5 Conference. The following

244. ## Physics

A bus started out going 20 miles per hour on the highway. One hour later it drove 40 miles per hour on the freeway. How long did it take to go 140 miles? Is the correct answer 3.5 minutes.

245. ## Physics

A bus started out going 20 miles per hour on the highway. One hour later it drove 40 miles per hour on the freeway. How long did it take to go 140 miles? Is the correct answer 3.5 minutes.

246. ## biology

A medical microbiological lab report indicates that a sample contained a biofilm, and that one species in the biofilm was identified as Neisseria gonorrhoeae. Is this strain of Neisseria likely to be pathogenic? Why and why not?

247. ## Math

Find the discriminant. Tell which conic section the graph will be. 3x^2 + 12 xy + 9y^2 + 7x -2y - 100

248. ## algebra

The Environmental Protection Agency (EPA) monitors air quality in U.S. cities. The function f gives the annual number of days with unhealthy air quality in Los Angeles, California, for selected years. X: 1995 1997 1999 2000 2003 f(x):113 60 56 87 88 (a)

Is it possible for companies both to maximize financial value for shareholders and to act responsibly in the communities in which they operate, to treat their employees, customers, and suppliers well, and to engage in activities that are good for the

Imagine you are the owner of a growing technology or service company with a healthy cash flow but little in the way of property and equipment. Develop a strategy for meeting your short-term financing needs to acquire needed property and equipment.

251. ## chemistry

what is the wave lenghth of the alpha particle Po which has velocity of 15x10 to the power 6 ms-1

252. ## Life orientation

What are the checks and balances that are in place in south africa that control and regulate media

253. ## Chemistry

Boron Phosphide, BP, is a semiconductor, and a hard, abrasion resistant material. It is made by reacting Boron tribromide and phosphorus tribromide in a hydrogen atmosphere at high temperature (>750 degrees C) (a) Write a Balanced chemical equation for the

254. ## chemistry

Phenylalanyl aspartate, Nutrasweet, is an artificial sweetener used in many diet drinks. If a solution prepared by dissolving 6.068 mg of Nutrasweet in 125 milliliters of water exhibited an osmotic pressure at 25ºC of 3.23 mm Hg, what is the molar mass of

255. ## Chem

238U + 2H --> ________+ 2 1n 92 1 0 I don't know the answer that goes in the blank or how to figure it out. Please help me. Thanks

256. ## English

I need your help to check the word choice in these sentences. Thank you. 1) George Orwell along with Ernest Hemingway were among the more famous (is "most" a mistake?) foreigners participating in the efforts against the fascists. 2. Many Spanish

257. ## Management

Pat,a manager at State University, is deciding how to set up a procedure for registering online that gives students fair access to courses. Pat is engaged in the (a) utilitarian, (b) individual, (c) moral-rights, or (d) justice approach. I chose (b)

258. ## math

if two vertices of equilateral triangle is (0,0) (3,3^1/2)find the third vertex

259. ## English

Could you please check these sentences, too? 1)Winston lives in Victory Mansions, an apartment (?) for Outer Party members in what used to be London. He also rents a small apartment in the Proles area with Julia for the purpose of meeting her. 2)Big

260. ## maths

If f (x) =x^3−2x^2−x+5,then the remainder of g(x)=f( f(x)) divided by (x − 2) is(a) 3 (b) 5 (c) 7 (d) 9 (e) 11? 3 days ago - 1 day left to answer.

261. ## English

Thank you very much, Damon. Here are a few more sentences I need to check.In particular, a need to know which word choices are possible. 1)He is brought/sent to (into also possible) prison cell 101, where he is systematically beaten and tortured. O’Brien

262. ## PHI103

If the word "should" appears in a sentence, that sentence will always involve an ethical claim. True False To tell you the truth i really do not know this but maybe it could be true

263. ## PHYSICS

A space explorer is 4.6 billion km away from a certain star, and observes that the gravitational force of attraction exerted on the spacecraft by the star is 500 N. What will the force become when the craft has approached to a position 2 billion km from

264. ## math

how to write 51/60 as a reduced fraction

265. ## chemistry

If you have 2 moles of glucose in 8 liters of solution, what is the molarfity of this solution?

266. ## Trig.

finnd a possible measure of the angle drawn in standard position that passes through the points (ã2,-ã2)

267. ## Physiology (reproduction)

if only one sperm penetrates into the zona pellucida of the ovum n other sperm which try to bind to the ovum are prevented from binding by the cortical granules secreted by exocytosis than what happens in Sextuplet? please give a detailed explanation.

268. ## Tiáº¿ng ANh

Tháº§y lÃ m giup em cÃ¢u nÃ y vá»›i áº¡. Make these sentences positive or negative or questions, using the verbs given in capitals and the past Simple. Of course we â€¦. The house ourselves. We donâ€™t know anything about building!

269. ## Chemistry

How would you analyze a solution known to contain Hg22+ and Cu2+?