# Questions Asked onOctober 11, 2011

1. ## Chemistry

You have a solution that contains 5.0 grams of oxalic acid dissolved in 150 mL of water. This solution is placed in a seqparatory funnel, and the 100 mL of diethyl ether is added to the separatory funnel and an extraction is performed. Use the following

2. ## Chemistry

You have a solution that contains 5.0 grams of oxalic acid dissolved in 150 mL of water. This solution is placed in a separatory funnel, and the 100 mL of diethyl ether is added to the separatory funnel and an extraction is performed. Use the following

3. ## math

Studies have shown a particular television commercial is understood by 25% of first grade students and 80% of fourth grade students. If a television advertising agency randomly selects one first grader and one fourth grader, what is the probability neither

4. ## Physics

A diver stands at rest at the end of a massless diving board as shown in Figure P8.16. (a) If the mass of the diver is 161 kg, and the board is 4 m long, what is the torque due to gravity on the diving board? I was thinking that T=Frsin(theta)... but I

5. ## algebra

1. The statement 3x – 4 = 2x + 9 is called .

6. ## calculus

How to factorise t3-8t2+16t?

7. ## physics

Two speakers are separated by distance d1 = 2.40 m and are in phase. You are standing 3.00 m directly in front of one speaker. Each speaker has an output power of 1.20 W. Because the speakers are at different distances, there will be frequencies at which

8. ## calculus

How to factorise t3-8t2+16t?

9. ## Physics

An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. b) How far does the box travel up

10. ## Physics

A student puts a 0.80 kg book against a vertical wall and pushes the book toward the wall with a force of 26N [R]. The book does not move. a) calculate the minimum coefficient of static friction. b) describe two ways the student could make the book

11. ## physics

A person pushes horizontally with a force of 170 N on a 68 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.22. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration?

12. ## physics

A string is tied to a 4.4 kg block and a 120 g bucket from a pulley. Students add 20 g washers one at a time to the bucket. the students are unaware that the coefficient of static friction for the block on the table is 0.42. a) what is the maximum force of

13. ## engineering

A slotted bar is attached to the origin and rotates in the horizontal plane with a constant angular velocity of 0.665 radians/s . The bar moves a roller weighing 33.6 lb along the cam's perimeter. A spring holds the roller in place; the spring's spring

14. ## Chemistry

Imagine that you mix 50 g of a solute with 100 g of water at 40 degree C. Classify each solute by whether it would completely or partially dissolve under these conditions. -KCl -KClO3 -K2Cr2O3 -KNO3 -NaNO3 -Pb(NO3)2 I need help understanding the

15. ## Math

Which expression describes the area in square units of the rectangle that has a length of 10x^3y^4 units and a width of 5x^2y units?

16. ## English

I was wondering if you could help me revise this? Questions plague the mind of many readers of why exactly Tessie Hutchinson was stoned in Shirley Jackson’s, “The Lottery”. This gruesome tale tells of an innocent woman stoned in a small village of

17. ## FIND THE VALUE OF SQUARE

I AM A NUMBER GREATER THAN 99 AND LESS THAN 1,000. TWO OF MY DIGITS THAT AREN'T NEXT TO EACH OTHER ARE THE SAME. MY TENS DIGIT COULD NOT BE GREATER AND IT IS 1 MORE THAN MY HUNDREDS DIGIT. WHAT NUMBER AM I?

18. ## science

A Kid applies a force of 70 Newtons to a ball over 1.1 meters.How much work did he do on the ball?

19. ## statistics

A city survey found that 47% of teenagers have a part time job. The same survey found that 78% plan to attend college. If a teenager is chosen at random, what is the probability that the teenager has a part time job and plans to attend college?

20. ## chemistry

Calculate the molality of a 10% H3PO4 solution in water.

21. ## World HIstory! hurry please

How did the civilization that arose along the banks of the nile river differ from the civilizations of the fertile crescent?

22. ## Chemistry

Consider 2 separate solutions, one of a weak acid HA and one of HCL. Assume that you started with 10 molecules of each. Draw a picture of what each solution looks like at equilibrium. Ok to my very limited knowledge on this subject so far, a weak acid at

23. ## Math

Which expression eqivalent to 27x^-2y^6/3x^5y^2z^9?

Toyota used to sit on top of the world. It basked in the reputation of building high-quality cars efficiently. It enjoyed unprecedented growth, even surpassing General Motors as the largest car manufacturer in the world. But all of that came tumbling down

Group 1 will represent a major tobacco company like R. J. Reynolds or Philip Morris. . Topic that will be debated is: Should tobacco companies cease and desist all advertising in the United States? Each group should thoroughly research the issues. You will

26. ## Math

1.8=[(5.0-x)/100]/[x/150] Solve for x

27. ## Math

Remainder Theorem Question: For what value of b will the polynomial P(x) = 4x^3-3x^2+bx+6 have the same remainder when it is divided by x-1 and by x+3

28. ## math

A wooden ball 7 inches in radius sinks to a depth of 10 inches in a river. Find the exposed area of the ball above the water.

29. ## physics

TWO EQUAL FORCES HAVE A RESULTANT EQUAL TO 1 1/2 TIMES THE EITHER FORCE . AT WHAT ANGLE THEY ARE INCLINED TO EACH OTHER

30. ## bio-technolgy

how much MgCl2 would you use to make 200mL of a 100mM solution of MgCl2

31. ## English

Can you please check if everything is OK? Thank you 1)The witches predict Macbeth that he would be Thane of Cowdor. 2)They predict that he will be Thane... James I wrote in the Demonology what he thought witches were able to do. Corr: In his book

32. ## College Physics

A charged particle is hanging from the side of a wall by means of an uncharged string. The wall has a negative charge producing a horizontal electric field. The particle has a mass of .01 Kg. and charge of -80(micro)C and is suspended by a string .3m long.

33. ## chemistry

An 27 liter indoor air sample is collected in a Tedlar bag in the crawl space of a building built on an old municipal dump. There is a suspicion that methylene chloride vapor may be seeping into the building. The temperature is 32¢K and the pressure is

34. ## Mathematics

If (a+b)squared = 361 and ab =-120, calculate the value of a squared + b squared

35. ## vocab

10 examples noun ending x

36. ## probability

A random experiment of tossing a die twice is performed. Random variable X on this sample space is defined to be the sum of two numbers turning up on the toss. Find the discrete probability distribution for the random variable X and compute the

37. ## calculus

tan 30=a/ 9 inches

38. ## DUMANGEZE

A 0.04KG BEAD SLIDES ON A CURVED STARTING FROM REST AT POINT A.THE EARTH FROM A AND B IS FRICTIONLESS ,WHILST THE PATH FROM B TO C IS ROUGH.IF THE BEAD ARRIVES AT POINT C WITH A SPEED OF 1M/S DERTIMINETHE AMOUNT OF WORKDONE BY THE FRICTIONAL FORCE IN

39. ## science

churvas mass is 66kg. find his weight on earth and on the moon.

40. ## science

churvas mass is 66kg. find his weight on earth and on the moon.

45. ## macroeconomics

27. The following data show nominal GDP and the appropriate price index for several years. Compute real GDP for each year and indicate whether you have “inflated” or “deflated” nominal GDP in finding real GDP. All GDP are in billions. Nominal Price

46. ## algebra

Company makes tire rims. Estimates the the profit, P, of selling x tire rims is given by: P= -0.01x^2 + 8x + 1500 Plugging in 1000 for P and solving, I get 400. Is that correct? b) find the number of rims that must be sold to maximize profit. plugging in

47. ## Algebra

1. A car travels 20 kilometers per hour faster than a second car. The first car covers 180 kilometers in the same time the second covers 135 kilometers. What is the average speed of each car? 2. The tens' digit of a two-digit number is one more than its

48. ## kvb

Sam hits a golf ball with a five-iron a distance of 120 m horizontally. A tree 45 m high and 35 m in front of Sam is directly in the path of the ball. Will the ball clear the tree if the ball makes a parabolic curve and has maximum height of 80 m?

49. ## Calc

Suppose Y1 is a function of x which dy1/dx=3y1. Suppose y2 is a function of x which dy2/dx=8x+5. If the graphs of y1 and y2 have the same y-intercept and they intersect at x=2, then determine the value of the y-intercept.

50. ## chem

calculate the molality of a solution of 2.34g acetic acid, HC2H3O2, in 35.0 g water

51. ## not sure

A homeschooled child is being abused by her Father. What should she do???

52. ## English

Can you please check these sentences (and my corrections)? I urgently need them. Thank you. 1) The apron stage raised five feet from the ground (not form the floor of the theatre. /It was five feet above the ground but not It was five feet high from the

53. ## algebra

I NEED HELP SOLVING THIS PROBLEM ,PLEASE EXPLAIN AND SHOW HOW TO SOLVE the answer ."I HAVE 63 LITERS OF HYDROGEN PEROXIDE, HOW MANY TEST TUBES CAN I FILL IF EACH CONTAINED 7/8 OF A LITER?" PLEASE SHOW ME YOUR WORK. AND THANK YOU IN ADVANCED.

54. ## STATISTICS 014

1. A manager wishes to find out whether there is a relationship between the age of his employees and the number of sick days they take each year. The data is given below: Age (X) 18 26 39 48 53 58 24 50 Days (Y) 16 12 9 5 6 2 10 7 a. What is the null

55. ## STAT

A random variable X2 assumes only positive value.?

56. ## Physics

A jet aircraft is traveling at 180 m/s in horizontal flight. The engine takes in air at a rate of 77.0 kg/s and burns fuel at a rate of 3.15 kg/s. The exhaust gases are ejected at 595 m/s relative to the speed of the aircraft. Find the thrust of the jet

57. ## physics

A rocket consists of a payload of 4280.0 kg and 1.626 105 · of fuel. Assume that the rocket starts from rest in outer space, accelerates to its final velocity, and then begins its trip. What is the speed at which the propellant must be expelled to make

58. ## Physics

Find the location of the center of mass for a one-dimensional rod of length L and of linear density ë(x) = cx, where c is a constant. (Hint: You will need to calculate the mass in terms of c and L. Use any variable or symbol stated above as necessary.) X

59. ## physics

Find the center of mass of a rectangular plate of length 10 cm and width 39 cm. The mass density varies linearly along the length. At one end, it is 8 g/cm2; at the other end, it is 18 g/cm2. (Assume the x-axis begins at the 8 g/cm2 edge and extends along

60. ## physics

A 1175-kg cannon shoots a 33-kg shell at an angle of 25° above the horizontal and a speed of 495 m/s. What is the recoil velocity of the cannon? (Take the direction the cannon is firing to be the positive direction. Indicate the direction with the sign of

61. ## Physics

Two masses, m1 = 2.0 kg and m2 = 3.3 kg, are moving in the xy-plane. The velocity of their center of mass and the velocity of mass 1 relative to mass 2 are given by the vectors vcm = (−1,+2.2) m/s and vrel = (+4.5, +1.0) m/s. (a) Determine the total

181. ## english

In part 3 "Burning Bright" in fahrenheit 451 novel .What symmetry lies in rebuilding of the city? can you explain what they mean in this question ? thank you

182. ## Chemistry

The density of any material can be determined by the slope of a straight line by plotting mass values and vol. values M=DV Mass g. Vol.ml #1 0.55 0.60 #2 1.75 1.80 #3 3.50 3.40 #4 5.60 5.25 #5 7.50 7.00 I need to find the slope and graph the info. So do I

183. ## math

what is greater than 7.8 but less than 7.9

200. ## science

Suppose you have 7 pieces of wood shown to the right. Predict what will happen

201. ## math

how to write algebraic expression the square of a number k which is then multiplied by 13

202. ## science

Any ideas on making a 3d model of the eye. There arent any rules.thanks

203. ## physics

A model rocket is launched straight upward with an initial speed of 51.6 m/s. It accelerates with a constant upward acceleration of 1.96 m/s2 until its engines stop at an altitude of 230 m. What is the maximum height reached by the rocket? The acceleration

204. ## estem

how much work is done on a vacuum cleaner pulled 5.0m by a force of 45.0 N at an angle 35 above the horizintal? solving work

Ok today during social studies I got this mini progress report (it's a overview on what grade I have right now before they send our real progress report which they may send this week or next week) and like I just want to know what GPA i got. Here it is &

206. ## social studies

We are using the bookjourney across time 9the early ages) pg. 105 no. 22 asks "What advantage did Judah have over Israel? It shows a map the the Israelite kngdom, and I's supposed to answer it with the map. I have noclue. Can anyone help? Thanks.

207. ## Science

Suppose you have 7 pieces of wood shown to the right. Predict what will happen to the mass of the pieces of wood if you put them together without cutting them to make a birdhouse

208. ## Math

What does A+B+C equal if A=6,B=3 and B=C?

209. ## Math

Solve two solutions. If there is a solution write it or I there isn't any write no solution. -3ly-3l = 9 (l l is absolute value sign)

210. ## math

what is the sum of radical x- 1 and (x-1)^2 when x= 5?

211. ## Science

What is sometime call your windpipe

212. ## math

How do you find GCF (boomerang method)?

213. ## ALGebra Simplify

I cant figure this out 6 /2 * 8-8 /2 i got 6/2 * 8-8 /2 3*8 4 24 -4 = 20 is this right way? 29 - (3+5) *2 +3 i got 16 is that right? 5-[6+3(-40/8) + (-2)exponent 2 i got 9 x5 = 45 + 4 = 5 -49 = -44 is that correct?

214. ## math

how to do 23x17

215. ## estimating sums

the flower shop received a shipment of 432 roses. they need to fill an order for 273 roses. use any method to estimate how many roses they will have left

216. ## Astronomy

Imagine that Earth did not turn on its axis. (a) What would be true about the ecliptic? It would now define the day rather than the year. It would still be defined and could be seen from all points on Earth, but only when they faced the sun. It would still

217. ## Accounting

According to the Sarbanes-Oxley Act, the responsibility for issuing a report on a company's internal controls over financial reporting rests with: A.) both the company and its independent auditor. B.) the company. C.) the independent auditor. D.) neither

218. ## Math

Find the value of x: 20x ≡ 9 (mod 15)

219. ## Math

The half-life of carbon-14, which is used in dating archaeological finds, is 5730 yr. Assume that 100% of the carbon-14 is present at time 0 yr, or x=0. Write the equation that expresses the percentage of carbon-14 remaining as a function of time.

220. ## Math

Journal one box hold 16 crayons another box jold 24 crayons. Write a sentence using word that compares the crayons in the the two boxes.

221. ## math

a boy is blowing a spherical balloon at a rate of 50 cm3/s.at what rate is the radius of the balloon changing when the radius is 10 cm?give your answer to 2 decimal places.

222. ## math

How do you find GCF (boomerang method)?

223. ## science

What are three methods scientists use to form scientific explainations ?

224. ## trig

Given that sin theta= 3/5 and the terminal side is in quadrant II, find tan (pi/2 - theta)

235. ## Math

My tens digit is double my one digit.I am less than 70 greater than 60.

236. ## math

a boy is blowing a spherical balloon at a rate of 50 cm3/s.at what rate is the radius of the balloon changing when the radius is 10 cm?give your answer to 2 decimal places.

237. ## MATH

jake says adding 0 does not change a number. Is he correct? Explain.

238. ## English

My brother and I lie down to see how many of us could fit inside a blue whale. Underline the predicate

239. ## physics

Mars has a mass of about 6.8 × 1023 kg, and its moon Phobos has a mass of about 9.5 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.66 × 1015 N, how far apart are Mars and Phobos?

240. ## calculus

y = (ln x)^(cos4x) Use logarithmic differentiation to find the derivative of the function.

241. ## Algebra

I need help! The question is what numbers for which the rational expression is underfined in 8/9x+7

242. ## math

the bus passes through Sierra Blanca, which is 90 miles from El Paso. About how long does it take the bus to get to Sierra Blanca?

243. ## physics

a 75 kg person escapes from a burning building by jumping from a window 30 m above a catching net. Acceleration due to gravity is 9.81 m/s^2. Assuming air resistance is simply a constant 96 N force on the person during the fall, determine the person's

244. ## algebra

3b+7=-2 14+h/5=2 h/5=fraction m/8+4=16 m/8=fraction 3x-1=8 35=3+5x -3+m/3=12 m/3=fraction -x-4=-20 5=-z-3

245. ## trig

Given that tan B= 7/24 with B in quadrant III, find sin 2B, cos 2B, and tan 2B, using angle identities.

246. ## SCIIEENNNCEE

how do we see upright if the images produced by our eyes are vertically inverted ( i know our brain does something to fix it... but not sure exactly what) Merci

247. ## Math Middle School

Please help me solve this challenge problem: I love hot chocolate and coffee. I began by making one cup of hot chocolate. I drink half of my cup and then I fill the cup with coffee. I stir the new mixture and drink half of the cup and then fill the cup

248. ## Alzhemiers

How does alzhemiers have abnormal cell division? Please give me any link to any site, thanks.

249. ## physics

a room that measures 10.o ft wide, 32.0 ft long, and 8.00 ft high needs a certain amount of air pumped into it per minute to keep the air quality up to regulations. If the room needs completly new air every 20.0 minutes, whjat is the volume of air per

250. ## math

2.Define the shape of the rectangular area by establishing a relationship between the length and width of the rectangle. For example, L = 2W + 5, or W = 3L – 4. Be sure to include the appropriate units (inches, feet, yards, miles, or meters). 3.Using the

251. ## physics

Two children float motionlessly in a space station. The 20-kg girl pushes on the 40-kg boy and he sails away at 1.0m/s. What happens to the girl?

252. ## physics

An object is dropped from a cliff and reaches a velocity of 47.5 m/s at the time of impact. a) How high is the cliff? b)How long did it take to hit the river below?

253. ## physics

A metal sphere has a charge of +6.4 C. What is the net charge after 4.1 x 1013 electrons have been placed on it?

254. ## mrs SUe Algebra check

I cant figure this out 6 /2 * 8-8 /2 +4 i got 6/2 * 8-8 /2 3*8 4 24 -4 = 20 is this right way? 29 - (3+5) *2 +3 i got 16 is that right? 5-[6+3(-40/8) + (-2)exponent 2 i got 9 x5 = 45 + 4 = 5 -49 = -44 is that correct? [-6*(2-4)]/(-2)-(-9) i got -1.71

256. ## optics

what is the success rate of laser eye surgery?

257. ## geometry

complete the following proof. given: 5 -2/3x=1 proff: x=6

258. ## MATH

AUNT ALICE GAVE EACH OF HER 3 NIECES A NUMBER OF SILVER DOLLARS EQUAL TO THEIR AGES. THE YOUNGEST FELT THAT THIS WAS UNFAIR. THEY AGREED TO REDISTRIBUTE THE MONEY. THE YOUNGEST WOULD SPLIT HALF HER SILVER DOLLARS EVENLY WITH HER SISTERS.THE MIDDLE SISTER

259. ## trig

Find the exact value by using a half-angle identity. cos 22.5 degrees

260. ## Chemistry

If 7 mL of water is added to 3 mL of a 0.50 M KOH solution, the concentration of KOH is changed to? I am not sure how to go about doing this. Please help, thank you!!! Would I do (7)(3) / 0.50?

261. ## Physic

How long would it take a laser beam to go to the Moon and back if the distance to the Moon is 3.8 x 108 m? I know that Velocity of light is 3x10^8 m/s

262. ## Physic

Assuming no air resistance, how long does it take a penny to fall if it was dropped from the CN Tower (553 m)? Acceleration due to gravity is 9.8 m/s2.

263. ## Physic

Assuming no air resistance, how long does it take a penny to fall if it was thrown down with an initial velocity of 5.0 m/s from the CN Tower (553 m)?

264. ## Mathematics

Images on a computer can be stored many ways to account for quality and space issues. One of the factors we can adjust is colour depth. Colour depth determines the number of bits we use for each pixel of an image. The pixels are the small dots that make up

265. ## Math

Find the volume of steel required to make the beam B=108cm2 Length is 80cm

266. ## math

Read the following scenario, and formulate the response you might give the parent; share your response, and explain your reasoning: A new math teacher at your school is questioning your use of manipulatives in the classroom. They think using manipulatives

267. ## physics

Let the radius oh a circular segment be 110 m, the mass of the car 1508 kg, and the coefficient of the static friction between the road and tire 0.9. Find the magnitude of the normal force N which the road evers on the car at the optional speed (the

268. ## math 5

The date of the first Friday in November can be represented by thevariable F. Write an expression using F for each of the following dates in November. A. the first Tuesday B.the first Saturday C. the second Friday D.the third Friday

269. ## Math Middle School

I just found the answer tonight that you posted for us last night. Ms. Sue informed me. THANK YOU VERY MUCH!!

asked by Thank you Reiny !!!!!
270. ## Math Middle School

I was not able to find the posted answer at first. We have it now.

271. ## Can someone help me please? MATH

Identify the sampling technique used to obtain this sample: Each person boarding a plane is asked to flip a coin; those showing “tails” have their luggage searched.

272. ## Science

A football player has to push a blocking sled the length of a football field. What are two ways the workload for the football player could be increased?

273. ## psychology

what are the four goals of psychology and one example for each?

274. ## MATH HELPPPP

3b+7=-2 14+h/5=2 h/5=fraction m/8+4=16 m/8=fraction 3x-1=8 35=3+5x -3+m/3=12 m/3=fraction -x-4=-20 5=-z-3

275. ## Physics....

A spacewalking astronaut with a mass of 78 kg pushes off a 540 kg satellite, exerting a 125 N force for the 0.5 seconds it takes him to straighten his arms. How far apart are the astronaut and satellite after 60 seconds?

Customers arrive at Paul Harrold¡¯s styling shop at a rate of 3 per hour, distributed in a Poisson fashion. Paul a perform haircuts at a rate of 5 per hour, distributed exponentially. a) Find the average number of customers waiting for haircuts. b) Find

277. ## trig

THE SIDE OF A RIGHT-ANGLED TRIANGLE ARE 3XCM,3X-1CM AND 4X PLUS 1CM ,THE LAST SIDE BEING THE HYPOTHENUS FIND X.

278. ## Math

consider 2 car loans A) 5.9% APR and 3,000 'cash back' B) 1.9% APR and no cash back both loans are repaid after 5 years pick any car to buy and calculate the total amount owed at the end of 5 yearrs. which loan is better choice. the car i have choosen in

279. ## Chemistry

What volume of o.410 M HNO3 would you need to neutralize 18.75mL of 0.376M Ba(OH)2? Would you do (0.410)(18.75) / 0.376? Or (0.410)(0.376) / 18.75

280. ## Physics

Water waves in a shallow dish are 7.05 cm long. At one point the water oscillates up and down at a rate of 3.6 Hz. What is the speed of the wave? Answer in units of m/s

281. ## Physics

Plus 10 for each correct response and no penalty for incorrect answers. The length of a string is 996 cm. It is held fixed at each end. The string vibrates in six sections; i.e., the string has six antinodes, and the string vibrates at 190 Hz. find the

282. ## Physics

What is the period that corresponds to a frequency of 53.1 Hz? Answer in units of s

283. ## physics

A string of 29 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 65 W. What is the equivalent resistance of the light string? Answer in units of Ω

284. ## Calculus

Find f(x+h) for f(x)= x^2 - 2x - 3

285. ## algebra 1a

solve the system of equation by graphing. then classify the system. x + y=10 x - y=2

286. ## chemistry

What is the percent by mass concentration of KCl in a solution prepared by adding 80 grams KCl to 200 grams of water?

287. ## Physics

An object is dropped from a cliff and reaches a velocity of 47.5 m/s at the time of impact. a) How high is the cliff? b)How long did it take to hit the river below?

288. ## Math

A blue jar has 25 marbles A red jar has 53 marbles .Which shows how to compare the number of marbles?

289. ## chemistry

mole creative assignment RAFT writing my raft is that i am mole, i am writing to periodic table, the rap song is a form will i take and explain how to find molar mass. using theese things i have to write half page paragraph but i don't know how start my

290. ## Organic Chemistry

What is the mechanism of action between between benzoic acid (C6H5COOH) and sodium bicarbonate (NaHCO3)? I need to know where the electrons go in the acid-base reaction.

291. ## Science (Chemistry

Write the relationship between the rate of disapperance of H2C2O4 (aq) and the rate of apperance on Mn ^2+ (aq) for the reaction represented by the following equation. 2MnO4^-(aq)+ 5H2C2O4 (aq)+6H3)^+(aq) -->10CO2(g)+2Mn^2+ (aq)+14H2) (l)

292. ## Physics

A 5.0 kg wooden block is placed on an adjustable inclined plane. (For this problem, μs is approximately 0.55 and μk is approximately 0.25) a) What is the angle of incline above which the block will start to slide down the plane? b) At what angle of

293. ## Organic Chemistry

What is the mechanism of action between sodium benzoate (NaC6H5COO) and hydrochloric acid (HCl)? I need to know where the electrons go in this reaction.

294. ## Science (Chemistry

Use the experimental data below to determine the order of the reaction with respect to [Cr(NH3)5Cl]^2+(aq)+OH^-(aq)-->[Cr(NH3)5(OH)]^2+(aq) +Cl^-(aq) You must show your work for any calculations and/or sketch or include a printed graph showing how the

295. ## Chemistry

Rank the carbon-carbon bonds in order of decreasing bond length. Rank carbon-carbon bonds from highest bond length to lowest. To rank bonds as equivalent, overlap them. 1,2,3

296. ## english

Okay so there is a non profit organization called Heifer. This group sends animals to 3rd world countries. It teaches people to raise animals on their own for food. One stipulation to receiving the animal is you have to give two of it's offspring to

297. ## Physics

The coefficient of kinetic friction between a suitcase and the floor is 2.14. If the suitcase has a mass of 71.5 kg, how far can it be pushed across the level floor with 570 J of work?

298. ## Physics

Water skiers often ride to one side of the center line of a boat, as shown in the figure. In this case, the ski boat is traveling at 15 m/s and the tension in the rope is 90 N. If the boat does 3500 J of work on the skier in 42.4 m, what is the angle θ

299. ## arithmetic

THE TOTAL AGE OF GROUP OF PARENTS IS 342.A NEW PARENT AGED 48 JOINS THE GROUP AND THE AVERAGE RISES BY 1. WHAT IS THE ORIGINAL AVERAGE.

300. ## Chemistry

a titration experiment 20 mL solution of hydrochloric acid required 15.2mL of a .879 M barium hydroxide solution. What was the molar concentration of the HCl solution?

301. ## slu

what are critical points for the function g(x)=36x-9tanx

302. ## physics

A mass m = 4 kg hangs on the end of a massless rope L = 2.02 m long. The pendulum is held horizontal and released from rest. 1)How fast is the mass moving at the bottom of its path? 2)What is the magnitude of the tension in the string at the bottom of the

303. ## physics

A mass m = 73 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 17.9 m and finally a flat straight section at the same height as the center of the loop (17.9 m off the ground). Since the mass would not make it

304. ## physics

A block with mass m = 14 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4545 N/m after being compressed a distance x1 = 0.515 m from the spring’s unstretched length. The floor is frictionless except for a rough

305. ## Math

How to convert 215% into a fraction. Can anyone help