# Questions Asked onNovember 2, 2010

1. ## chemistry

Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.0 -g mixture of equal masses of all three reactants is prepared.

why did zorna pour ketchup on her brother's hand

3. ## chemistry 1A

If 0.2178 g of a diprotic solid acid is neutralized by 44.81 mL of 0.0953 M NaOH, calculate the molar mass of the solid acid

4. ## Chemistry

A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.977 g/L at 680. torr and 84.1°C. What is the molecular formula of the compound?

5. ## physics

In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.80 m/s relative to the ground. A teammate passes the ball to him. The ball has a speed of 13.6 m/s and is moving in a direction of 32.5 degrees east of north, relative

6. ## AP European History

What were the factors responsible for western europe's domination of world trade from 1650-1800? i have to know 2 economic factors, 2 technological factors, and 2 institutional factors. please help this is going to be on a test that i' taking

7. ## Physics

Michael Jordan was said to have a hang time of 3 seconds. Use kinematic equations to determine the height to which MJ could leap if he had a hang time of 3 seconds. Hint: You are solving for distance!

8. ## US History

4. If Britain and France had not adopted a policy of appeasement, would Adolf Hitler have been as successful as he was in overruning Europe? Thanks -MC

9. ## Physics

A novice skier, starting from rest, slides down a frictionless 35.0 degrees incline whose vertical height is 140 m. 1. How fast is she going when she reaches the bottom?

10. ## Intro Chem

4Al(s) + 3O2(g)2Al2O3(s) Delta H reaction = -3351.4 kJ How much energy is transferred when 42.6 g of aluminum reacts to form aluminum oxide? Thanks

11. ## chemestry

At 298.K and 1.00 atm, assume that 22 mL of NO gas reacts with 18 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 3 2NO(g) + 2 + 2 ¾¾® 3 . If all of the nitric acid produced by this

calculate the mass of the water of hydration if a hydrate loses 0.025 mol of H2O when heated

13. ## physics

After 10.0 s, a spinning roulette wheel at a casino has slowed down to an angular velocity of +1.56 rad/s. During this time, the wheel has an angular acceleration of -5.45 rad/s2. Determine the angular displacement of the wheel.

14. ## chemistry

How many mL of 0.25 M H2SO4 can be made from 50.0mL of 0.50 M H2SO4? Also in this case, what does the capital M stand fro?

15. ## calculus

A lighthouse is built on an exposed reef, 5.5 miles off-shore. The shoreline is perfectly straight, and a town is located 6.5 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to

16. ## CHEMISTRY

Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate

17. ## English/Grammar

Hello - I am having trouble with verbs and linking verbs...can you tell me if these are correct? I also have to pick out the predicate noun/adjective. 1. In northern Canada, the countryside seems peaceful. (LV= seems, PA = peaceful) 2. The mountain air

18. ## physics

65.0-kg person throws a .045kg snowball forward with a ground speed of 30.0 m/s. a second person with a mass of 60.0-kg catches the snowball. both people are on skates. the first person is intially moving forward wit ha speed of 2.50 m/s and the second

19. ## Chemistry

Use the bond energies given in the "Bond Energy" table (can be gained from google) to estimate the delta Ho for the reaction given below. 2ClF3(g) + 2O2(g) Cl2O(g) + 3OF2(g) I did this: 1530 + 996 - (410 + 570) = 1546. But the answer was wrong. I don't

20. ## CHemistry

Use the bond energies given in the "Bond Energy" table (can be gained from google) to estimate the delta Ho for the reaction given below. 2ClF3(g) + 2O2(g) Cl2O(g) + 3OF2(g) I did this: 1530 + 996 - (410 + 570) = 1546. But the answer was wrong. I don't

21. ## physics

To push a 25.0kg crate up a frictionless surface incline angled at 25 degrees to the horizontal, a worker exerts a force of magnitude 209N parallel to the incline. As the crate slides 1.50m, how much work is done on they crate by (a) the worker's applied

22. ## Biochemistry

The restriction enzyme BamHI recognises the sequence 5’-G^GATCC-3’, cleaving between the first and second G, as indicated. Which of the following restriction enzyme recognition sequences will be cleaved to give sticky ends that are compatible with

A beam of microwaves with = 0.7 mm is incident upon a 12 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962°C, and its normal boiling point is 2212°C. What quantity of heat is required to melt 13.0 g of silver at 962°C?

25. ## PHYSICS ---HELP!

A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot. a = 40 cm b = 95 cm c = 30 cm W = mg = 784 N

26. ## chemistry

DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)

27. ## science

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How long was the ball in the air?

28. ## pre calc

Determine between which consecutive integers one or more real zeros of f(x) = –x3 + 2x2 – x – 5 are located

29. ## Biology

You are given the following protein sequence: NH2-Met-Trp-Trp-Met-Trp-Met-COOH What was the sequence of the mRNA? You must write your answer 5' to 3' direction, starting with the first nucleotide of the mRNA and ending with the last nucleotide of the mRNA.

30. ## geometry

The circumference of a circle is approximately 28.26 cm. Find its diameter and radius

write a story problem that represents each division expression.then solve the problem a. write a story problem that represents 528/24 divided

32. ## FIT

Joe Nautilus has $120,000 and wants to retire. What return must his money earn so he may receive annual benefits of$20,000 for the next 14 years?

33. ## psychology

Today, most psychologists take ____ approach to human development. a nativist an empiricist a dualist an interactionist

34. ## Chemistry

Calculate the change in heat for the reaction SO2 + 1/2O2 --> SO3

35. ## orgo

Which acid, maleic or fumaric acid appears to be more reactive to bromine addition? How does the cis/trans affect this?

36. ## physics

express the angular velocity of the second hand on a clock in rev/hr

37. ## pre cal

find the exact value of tan(2sin-1 3/5)

38. ## Physics

A student, crazed by final exams, uses a force P of magnitude 80 N to push a 4.0 kg block across the ceiling of his room. If the coefficient of kinetic friction between the block and the ceiling's surface is 0.42, what is the magnitude of the block's

39. ## Physics

Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 20 meter high platform into a shallow bucket of water. a. State Miss E.deWater's acceleration as she is falling from the platform? b. What assumptions must you make

40. ## PHYSICS ---HELP!

A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot. a = 40 cm b = 95 cm c = 30 cm W = mg = 784 N

41. ## Chemistry- helpp!

The equation for synthesis of the poisonous gas COCl2 is CO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis? THANK YOU!

42. ## Chem

You place a test-tube of a room temperature reagent into a beaker of hot water. Which of the following statements are true? (Assume that there are no energy transfers between anything except the reagent and the water.) Choose at least one answer. a. q

43. ## trig

cotx/secx-tanx

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision

45. ## physics

The instruments attached to a weather balloon in the figure below have a mass(m) of 5.0 kg. The balloon is released and exerts an upward force(F) of 92 N on the instruments.

46. ## Physics

Harry jumps horizontally from the top of a building that is 20.0 m high. He hopes to reach a swimming pool that is at the bottom of the building, 14 m horizontally from the edge the building. If he is to reach the pool, what must his jumping speed be?

The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962°C, and its normal boiling point is 2212°C. What quantity of heat is required to melt 13.0 g of silver at 962°C?

48. ## physics

a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object

49. ## Organic Chemistry I

Which acid, maleic or fumaric acid appears to be more reactive to bromine addition? How does the cis/trans affect this?

50. ## chemistry

A 13.0 mL sample of an unknown HClO4 solution requires titration with 25.2 mL of 0.180 M to reach the equivalence point. What is the concentration of the unknown HClO4 solution? The neutralization reaction is as follows: HClO4 +NaOH ===>> H2O +NaClO4

51. ## English

I have a few question on linking verbs: 1. I am fond of both kinds of comics. linking verb - fond? 2. Joseph Pulitzer was the first to publish color funnies. linking verb - was? 3. The sales of his newspaper were high. linking verb - sales 4. Sunday

52. ## Chemistry

A certain brand of iron suppluement contains FeSo4 7H20 with miscellaneous binders and fillers suppose 22.93 mL of KMnO4 solution used in the question above are needed to oxidize Fe2+ to Fe3+ in a 0.4927g pill. What is the mass percent of FeSo4 7H20(molar

53. ## Physics

A woman runs a kilometer using a force of 210 N and a power output of 500 W. How long in minutes does it take this woman to complete 1 kilometer?

54. ## calculus

A lighthouse is built on an exposed reef, 5.5 miles off-shore. The shoreline is perfectly straight, and a town is located 6.5 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to

55. ## Physics

Calculate the radial acceleration of an object at the equator of Jupiter (which takes 0.410 day to spin once), turning with the planet. (in )

56. ## help on geography!!

Where is the LCL (lifting condensation level) on the leeward side of and why?

57. ## chem

A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres? can someone

58. ## ALGEBRA

Company A charges $55 per day plus$0.35 per mile to rent a car. Company B charges $50 per day plus$0.40 per mile. Jack wants to rent a car for three days. How many miles should Jack be traveling so that Company A is less expensive than Company B?

229. ## science

what are some facts about atom's info's and ideas?

230. ## Math

What does ! mean in an equation? ex) 3! + (6*5) - (5+0)= 31 Well 3! has to equal 6

231. ## ethics

What are the consequences of violating a workplace standar? Is incarceration one of the possibilities? Why or why not? In addition, what does "relinquishing the approbation" mean? I'm not familiar with this term. Can you clarify?

232. ## English

I'm writing an essay on the short story, The Bouquet. It's a essay on the character of Mary Myrover. Tell me what you think... =D Mary Myrover is Charles W. Chesnutt's major character in the short story, "The Bouquet". She is a prideful, southern white

233. ## Maths

What is dy/dx of e^-x ?

234. ## math

its a function table input|output -3 | 7 0 | 1 3 |-5 8 |-15

235. ## Math

6*5*0*1*3*9*.5=___

236. ## Statistics

IQ test scores are normally distributed with a mean of 97 and a standard deviation of 11.An individual's IQ score is found to be 123.Find the z-score corresponding to this value

237. ## space

How many Earth Diameters would it take to reach the Sun 93,000,000 miles away?

238. ## Physics

A rock climber part way up a cliff face drops a piton and it falls for 2.0 s before hitting the ground. How high up is he?

239. ## sociology

Which topics or concepts interested you most in this course? How can you apply them to your life? Were there any topics you would like to explore further?

4n+8=9n-7

241. ## algebra

How many black keys are there in one octave?

242. ## english

I have to identify the adverb and the word or words the adverb modifies. 1.Some kinds of opals are extremely beautiful. 2.The ocean appears especially beautiful at sunrise. 3.On Sunday, the dogs in my neighborhood barked early. 4.No room remained at the

If there were 10 grams of iron and 20 grams of water what would the total amount be?

244. ## science

explain why the wrong ideas are incorrect about atoms and whu people might have these misconceptions.

245. ## social studies

can someone help me start my persuasive essay on vote for amendment 2 2010?

246. ## History

The Arian heresy asserted what concept?

247. ## physics

A 2.38 × 103 kg car requires 5.4 kJ of work to move from rest to some final speed. During this time, the car moves 28.1 m. Neglecting friction, find a) the final speed. Answer in units of m/s.

248. ## chemistry

Is there a reaction? 2 NaNO3 + ht →

249. ## cultural diversity

List two to three characteristics of Orientalism

A 10 kg ball moving due west at 2m/sec collided with a 4kg ball that is moving due east at 3m/sec. you determine that immediately after the collision the 10 kg ball is moving due west at .57 m/sec. a) this probably is a totally elastic collision b) this

251. ## finanace

why is it important to go through these steps when you are planning on making a large purchase

252. ## geometry

Find the value of x Show work 3x _ = x+15 2

253. ## global issues

For my pro side on the paper 'should the richer countries of the world help the poorer countries?'I have written about two pages so far. Starting with my introduction, and going in to my first two main points. I just wanted to get it all checked before I

254. ## physics

A 0.25 kg ball is thrown straight up into the air with an initial speed of 20 m/s. Find the momentum of the ball at the following locations.

255. ## maths

if bisector of any angle of triangle bisects he opposite side then it is isoceles triangle

256. ## Physics

Suppose you discover your grandfather's collection of Caruso records from the early part of the century. These disks played at 78.0 revolutions/minute (rpm) and were 9.00in. in diameter. What was the radial acceleration of a point on the rim of such a

257. ## ELA

Where is the complete subject in this sentence, "The goal of settlement houses is the improvements of neighborhoods"?

258. ## Global Issues

For my pro side on the paper 'should the richer countries of the world help the poorer countries?'I have written about two pages so far. Starting with my introduction, and going in to my first two main points. I just wanted to get it all checked before I

259. ## math

simplify (2h-6)

260. ## statistics

Given a level of confidence of 99% and a population standard deviation of 12, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 78. Show all work.

261. ## physics

which object will have higher inertia a rock of 20kg or a hollow ball of 22kg

262. ## Derviatives

Differentiate. V(x) = (3 x^3 + 3)(x^4 - 3 x)

263. ## english

Could someone please check for me? I have to list the adverb and then list the word the adverb modifies. 1. She is particularly interested in sports. 2. Have you ever climbed a mountain? 3. Which part of the assignment would you do next? 1.particularly-is

264. ## physics

what force will accelerate a 2000-kg. truck at a rate of 0.50

265. ## matematik

26 Ä±n karesi 2.26.25+25 karesi

266. ## trigonometry

Prove cos4x = 8 cos^4x-8 cos^2x+1

267. ## math

Cool mind teaser! -1, -6, 3, 68, 255, 654, 1379 Whats the patttern?

268. ## Physics

A spring that has a force constant of 1100 N/m is mounted vertically on the ground. A block of mass 1.90 kg is dropped from rest from height of 1.65 m above the free end of the spring. By what distance does the spring compress?

269. ## trigonometry

Graph the function f(x)=-1/2sin2x+1 on the interval [-2pi, 2pi]

tell how to make 10 when adding 8+10

271. ## english

please help me with this. it's an essay question that i'm really stuck on based on romeo and juliet. please help!!! thanks what are some decisions Romeo had to make that could possibly decide his fate, and how are his decidion-making skills in the first

272. ## ELA

what are "how to" essays called ???

273. ## Western Experience

why did the United States become so fearful of the Soviet Union after 1945? Why was the Soviet Union so fearful of the United States?

274. ## geometry

make a conjecture 6,12,9,18,15

275. ## algebra

Dean is 1/4 that of Emily. In six years Emily will be two times older than Dean. How old is Dean?

276. ## algebra

the graph of the axis of symmettry of the parabola y=2x^2-11x+3 is best describe by which of the following equations?

Write 0.7 and 0.21 as factors, then multiply the factors change the product to a decimal 7/10 x 21/100 = 147/10,000 decimal would be .0147 Would that be correct?

278. ## algebra

i need to simplify s to the tenth power over s to the sixth power

279. ## science 9

what is the volume in liters of an aquarium that is 140cm X 30cm X 17cm

280. ## algebra

C=3000 / 300-3X

281. ## math

what is a communitative property

LCM of 8x^5y^3z^2 and 26x^6y^2w^5 plz help me

283. ## band

i need help writting three sentences for social studies

asked by post a new question
284. ## Spelling

would "supply" follow the vcccv pattern?

How do you find the y-intercept in a graph, equation, and table?

286. ## algebra HELP ASAP

If $13,000 is deposited in a bank account paying 6% compounded quarterly, what amount will be in the account after 8 years? How much interest will be earned during the 8 years? The amount after 8 years will be$___ How much interest will be earned during

287. ## Algebra

What is the domain of y = 2/(x) + 2 x>0 x=0 All real numbers except x = 0 I think the domain is All real numbers except x = 0 Is that correct?

288. ## American Government

If the U.S. were to have another constitutional convention, would we keep a federal system or change it? why or why not?

289. ## calculus

Find all numbers b such that the average value of f(x)=2+6x−3x^2 on the interval [0,b] is equal to 3. Give your answer as a list of numbers, e.g., {1,2,3}.

x/3 = x+10/6

291. ## Economics and development studies

What is poverty? Why is important to understand the different context in which poverty manifests itself? Its an essay question Reference needed

292. ## American Government

If the U.S. were to have another constitutional convention, would we keep a federal system or change it? why or why not?

293. ## social studies

can you help me start my persuasive essay on saying no to the florida amendment 2 2010?

294. ## world history

how do i do a report that is due in 2 day that is on the 5 themes of geography and has to do with a current event i need help and i am having a break down how can i work like this HHHHHEEEEEELLLLLLLPPPPPPP ME

295. ## Math

2x+3y+4, 1.2x+1.8x+2.6