# Questions Asked onApril 4, 2013

1. ## Help? Math

Use equal intervals to make a frequency table for the average number of movies per person. You do not need to show tally marks. Country Average Number of Movies Turkey 0.5 Japan 1.2 UK 1.3 Finland 1.3 Austria 1.5 Germany 1.8 Spain 2.2 Sweden 2.2 Denmark

2. ## Math

Use equal intervals to make a frequency table for the average number of movies per person. You do not need to show tally marks. Country Average Number of Movies Turkey 0.5 Japan 1.2 UK 1.3 Finland 1.3 Austria 1.5 Germany 1.8 Spain 2.2 Sweden 2.2 Denmark

3. ## chemistry

The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.4. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq). (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of

4. ## Chemistry

The elements lithium and oxygen react explosively to from lithium oxide (Li2O). How much lithium oxide will form if 3.03 mol of lithium react? Answer in units of mol

5. ## chemistry

CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be

6. ## Physics

The ski slopes at Bluebird Mountain make use of tow ropes to transport snowboarders and skiers to the summit of the hill. One of the tow ropes is powered by a 22-kW motor which pulls skiers along an icy incline of 14° at a constant speed. Suppose that 18

7. ## Chemistry

Sodium methanoate, NaHCOO, and methanoic acid, HCOOH, can be used to make a buffer solution. Explain how this combination resists changes in pH when small amounts of acid or base are added. Buffers kind of confuse me and I'm not sure how to start this. Can

8. ## Chemistry

Calculate the change in pH if 0.050 g of solid NaOH is added to 250 mL of a buffer solution that contains 0.80 M NaH2PO4 and 0.17M Na2HPO4. I found the pH of the buffer solution to be 6.54.

9. ## Math

Find the APR (true annual interest rate), to the nearest half percent, for the following loan. Amount Financed = $1200 Finance Charge =$90 Number of Monthly Payments = 12

10. ## chemistry

In the reaction between formic acid (HCHO2) and sodium hydroxide, water and sodium formate (NaCHO2) are formed. To determine the heat of reaction, 75.0 mL of 1.07 M HCHO2 was placed in a coffee cup calorimeter at a temperature of 20.8 °C, and 45.0 mL of

11. ## Alg 1

A baseball player hit a ball with an upward velocity of 46 ft/s. Its height h is feet after t seconds is given by the function h = -16t^2 + 46t + 6. What is the maximum height the ball reaches? How long will it take the baseball to reach the maximum

12. ## Chemistry

How many milliliters of 1.0 M NaOH must be added to 200. mL of 0.10 M NaH2PO4 to make a buffer solution with a pH of 7.50? (5 points)

13. ## Chemisrty

How many grams of KClO3 must react to form 42.0 mL?

14. ## physics

An electron is accelerated from rest through a potential difference that has a magnitude of 2.90 × 107 V. The mass of the electron is 9.11 × 10-31 kg, and the negative charge of the electron has a magnitude of 1.60 × 10-19 C. (a) What is the

15. ## Analytical chemistry

A 25.0-mL solution of 0.0660 M EDTA was added to a 33.0-mL sample containing an unknown concentration of V3 . All V3 present formed a complex, leaving excess EDTA in solution. This solution was back-titrated with a 0.0450 M Ga3 solution until all the EDTA

16. ## Chemistry

An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 38 mL, and the temperature is raised to 827°C. What is the new pressure of the gas? torr

17. ## Precalculus with Trigonometry

Prove or disprove the following identity: (sin(10x))/(sin(x)+sin(9x)) = (cos(5x))/(cos4x))

18. ## Chmeistry

Estimate the uncertainty in the speed of an oxygen molecule if its position is known to be +/- 3 nm. The mass of an oxygen molecule is 5.31 x 10^26 kg.

19. ## Chemistry

Identify the relative molar amounts of the species in 0.10 M NaBr(aq). NaBr, Na+, Br-, H3O+, OH-, H2O

20. ## physics

A sled is accelerating down a hill at a rate of 1 m/s2 . If the mass of the sled is suddenly cut in half and the net force on the sled is doubled, what is the acceleration of the sled?

21. ## Physics

The temperature of an object is raised by 90ºC. This is equivalent to what increase in its absolute temperature?

22. ## Math

For n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x successes. Round your answer to four decimal places n = 10, p = 1/7, x = 3 A. 0.1189 B. 0.1546 C. 0.1308 D. 0.1427

23. ## chemistry

A 50.00-mL sample of groundwater is titrated with 0.0900 M EDTA. Assume that Ca2 accounts for all of the hardness in the groundwater. If 11.40 mL of EDTA is required to titrate the 50.00-mL sample, what is the hardness of the groundwater in molarity and in

24. ## Physics

An electric dipole (any pair of oppositely charge point particles) lies on the x-axis, consisting of a - 2.5nC charge at x = -10 cm, and a +2.5nC charge at x=10cm. Find the electric field (a) on the x-axis, at the point (20,0) and (b) on the y-axis, at

25. ## Chemistry

How many grams of CuSO4 * 5H2O are needed to prepare 100mL of a 0.10 M solution ?

26. ## Chemistry

How many grams do 5.8×10 24 atoms of argon weigh? Answer in units of g

27. ## anatomy physiology/check please

Muscular dysgenesis or dysgeny is a lethal, recessive, genetic disease of mice that is caused by a mutation in the mdg gene. Skeletal muscles from dysgenic mice are paralyzed and the animals die shortly after birth. You are a research scientist interested

28. ## Chemistry 12

When 1.00 g. of MgCO3 is added to 2.0 L of water, some, but not all, will dissolve to form a saturated solution. Calculate the mass of solid that remains undissolved.

29. ## Physics

A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that it's distance from the cave wall is 19 m.

30. ## maths

a matrix X has a+b rows and a+2 columns while the matrix Y has b+1 rows and a+3 columns. both matrices XY and YX exist. find a and b. can you say XY and YX sre of same type? are they equal?

31. ## Chemistry

When ice melts, it absorbs 0.33 kJ/g. How much ice is required to cool a 11.0oz drink from 76F to 39F, if the heat capacity of the drink is 4.18J/gC ? (Assume that the heat transfer is 100% efficient.) I got 11 g, but I guess that's wrong...

32. ## English

1. When Elizabeth made a speech presentation demonstrating how to create an effective PowerPoint Presentation, her speech is about: A. events. B. processes. C. concepts. D. objects. is it B 2. When speaking about abstract concepts, make them concrete to

33. ## Chemistry

Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10^-59. Solid hydroxylapatite is dissolved in water to form a saturated solution. What is the concentration of Ca2 in this solution if [OH–] is somehow fixed at 5.30 × 10^-6 M?

34. ## Spanish

(Querer) saber qué pasó. What would be the correct answer for the above statement. My answer is Quería saber qué pasó.

asked by Pat summers
35. ## physics

In the operating room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery. One gas that is often monitored is the anesthetic isoflurane (molecular mass = 3.06 10-25 kg). In a spectrometer, a singly

36. ## Chem

How many kilojoules of energy are needed to convert 104 g of ice at -14.6 to water at 25.8°C? (The specific heat of ice at -14.6 is 2.01 J/g°C.)

asked by just need set up
37. ## Calculus

the measurement on one side of a right triangle is found to be 9.5 inches inches, and the angle opposite that side is 27 degrees,45' with a possible error of 15'. (round answers to two decimal places) a) Approximate the percent error in computing the

38. ## physics

50+kg+ice+cube+slides+without+friction+up+and+down+a+30°+slope.+The+ice+cube+is+pressed+against+a+spring+at+the+bottom+of+the+slope,+compressing+the+spring+10cm+.The+spring+constant+is+25Nm.+When+the+ice+cube+is+released,what+distance+will+it+travel+up+the+slope+before+reversing+direction

39. ## science

A ________ biome is a cold, dry area where the sun barely rises during the winter. a. coniferous forest b. temperate deciduous forest c. grassland d. tundra this is a 7th grade question and can a science teacher help me out on this please so i can study

40. ## English

1. When a speaker seeks to explain or illustrate a process, she or he is probably speaking to: A. inform. B. persuade. C. entertain. D. celebrate. is it A 2. When the theme of a speech is, “Be all you can be. Join the Navy,” it is meant to: A.

41. ## Physics

A compact disk rotates from rest to 500 rev/min. in 5.5s. a) What is the angular acceleration assuming it is constant. b) How many revolutions does the disk make in 5.5 s. c) How far does a point on the rim 6 cm from the center of the disk traveling during

42. ## Calculus

You are in a boat "a" miles from the nearest point on the coast. You are to go to a point Q, which is "b" miles down the coast and 1 mile inland. You can row at 2 miles per hour and walk at 4 miles per hour. If a=3, and b=4, toward what point on the coast

43. ## Math

A bag holds 2 yellow, 1 green, and 2 red marbles. If you were to draw a marble from the bag 150 times, and replace it after each draw, how many yellow marbles would you expect to draw? (1 point) A:50 B:60 C:30 D:38 I say it's B or A

44. ## Analytical chemistry

Calculate pCd2 at each of the following points in the titration of 40.00 mL of 0.0040 M Cd2 with 0.0040 M EDTA in the presence of the auxiliary complexing agent NH3. The solution is buffered at a pH of 11.00. Take the NH3 concentration to be a constant

45. ## physics

A woman is 1.6 m tall and has a mass of 47 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitude of 2.2 × 1010 kg·m/s. What does the observer measure

46. ## chemistry

Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.)

47. ## Chem

How many kilojoules of energy are needed to convert 104 g of ice at -14.6 to water at 25.8°C? (The specific heat of ice at -14.6 is 2.01 J/g°C.)

48. ## physics

how long 1.2kw electric kettle take to heat 0.8kg of water from 20c to 100c?

49. ## Algebra 2

Which of the following methods can be used to construct a pattern of 10 numbers for which it would be mathematically impossible to predict the 11th term? (more then one answer.) A.Make a pattern, starting with 3, where each number is the next digit of pi

50. ## Algebra

Which of the following methods can be used to construct a pattern of 10 numbers for which it would be mathematically impossible to predict the 11th term? (more then one answer.) A.Make a pattern, starting with 3, where each number is the next digit of pi

86. ## Physics

Nicole throws a ball straight up.Chad watches the ball from a window 5meters above the point where Nicole released it . The ball passes Chad on the on the way up, and it has a speed of 10m/s as it passes him on the way back down.Determine how fast Nicole

87. ## Henri Laurent. Essay. Confuzzled

So I have to write an essay and it says what would I do if I were Henri Laurent. Who is he? Thanks

88. ## Chemistry

Ca(OH)2, CaF2, NH4NO3, KNO3, HNO3 - Arrange the solutions from most basic to most acidic. I know Ca(OH)2 will be most basic and HNO3 will be most acidic, but how do you determine for the other ones?

89. ## algebra

In most state and local courts, 12 jurors and 2 alternates are chosen from a pool of 30 prospective jurors.The order of the alternates is specified. If a juror is unable to serve, then the first alternate will replace the juror.The second alternate will be

90. ## math 140

If 5 is added to a number the sum is tripled, the result is 31 more than the number. Find the number.

(-8)*7

195. ## math

find the value of x in the equation 6x +4(70-x)=300

197. ## physics

Three different forces produce the same displacement: the vector Delta(r) starts at the left edge of your computer monitor and the tip points to the right edge of your monitor in a horizontal orientation. The first force has a magnitude of 10 N and it is

198. ## Math

Write an expression for 5 and m more

4 * (-6)

200. ## Math

Find the dimensions of a rectangular cover plate if its length is 8 inches longer than its width if its parameter is 60 inches(Hint:P=2L=2W)

201. ## math

what percent of 6,350 is 1,397?

202. ## Life orientation

Ways in which the human or ennvironmental problem impacts on the community.

203. ## Discrete Math

If n is a positive integer and n > 1,prove that (n) + (n-1) is a perfect sq  (2) ( 2 )

204. ## geometry

if the midpoints of the sides of a parallelogram in succession are joined, the quadrilatral formed is a a parallogram. Prove this theorem in euclidean geometry using analytic techniques

205. ## Math

Mr.Algieri Needs 4 1/2 Yds Of Dirt For A Planting Job. The Gravel Yard Sells A Yard Of Dirt For $27.95. How Much Will It Cost Mf. Algieri For The Dirt? If Mr. Algieri Has$ 125.00 To Pay For The Materials, Does He Have Enough Money?

206. ## math

Roger has three employees who earn $500,$550, and $700, respectively. how much does Roger owe for SUTA and FUTA in the first weeks? Assume a SUTA rate of$5.3% and a FUTA rate(after the company's credit for state unemployment tax) of .8%

207. ## Math

Prove by induction : if n < =(2^k) -1 then we can find the number with k guesses

208. ## English

_____ do you think will be the winner of the next election? a. Who b. Whom

209. ## Math

Prove by induction : if n < =(2^k) -1 then we can find the number with k guesses

210. ## Math

Prove by induction : if n < =(2^k) -1 then we can find the number with k guesses

211. ## Math

An airplane is flying at a velocity of 300km/h S30degW in a wind blowing at a velocity of 50km/h S20degE. What is the true speed and direction of the plane?

212. ## math help-emergency

I've been trying this alooot of times and couldn't get this answer in the book : 4(x-1)(2x+1) This is the problem: 9x^2-(x+2)^2

213. ## science

Does a rollercoaster have its greatest GPE at the top of the tallest hill or the bottom of the lowest dip?

214. ## early childhood

Name four elements of successful English-language leaner programs for preschoolers.

215. ## Physics

The magnification of an object 2km tall where placed in 150m in front of a plane mirror is ?

asked by Omonayin Isreal
216. ## Discrete Math

If n is a positive integer and n > 1, prove that (n over 2)+ (n-1 over 2) is a perfect square.

217. ## science

Pls how can I carry out qualitative analysis on iron 11 ammonium sulphate hexahydrate (NH4)2SO4.FeSO4.6H2O in a secondary school laboratory?

218. ## English

Pretend you are a modern social worker, educator, environmentalist, or military advisor to the president. Attack an evil you see the work by writing an ironic proposal and the proposal have to be outrageous

219. ## early childhood

By six to twelve months of age an infant is a specialist in his own native language. Explain.

220. ## chemistry

What is the concentration when 60.0 mL of a 9.00 M HCl solution is diluted to 1.170 liters? and how do you solve this problem?

221. ## math

If a cylinder’s height is four times its radius, if the cyclinder’s volume (ignoring the metals’ thickness) is 1000 cubic centimeters, and if the radius and hence the height could be in error plus or minus .2325%, determine the relative percentage

2a2+5a-25=0

223. ## Math

13% of what number is 16.25?

224. ## algebra word problem

To remodel a bathroom a contractor Charles $25 er hour plus material costs, which amount to$3825. Therefore, the total cost to remodel he bathroom is given by f(x)=25x+3825 where x is the number of hours the contractor works. Find a formula for f^-1(x).

225. ## Algebra

Explain how to factor the difference of two squares.

226. ## polamar

order these fraction from least to greatest 3/4,-2/3,7/10,-5/6

227. ## stats

given n=74 an x=32.find ^p and ^q

228. ## english

CHANGE TO PASSIVE VOICE;MY SISTER SPEAKS THREE DIFFERENT LANGUAGES QUITE FLUENTLY

Isolve for x: ln(x^2-6x-16)= 0 . help me beacuse I do not have the idea to work it out.

230. ## math

5 seamstresses can make shirts in 3 days so how many can 7 make in 10 days??

231. ## Maths

Find the value of x: (2x-1)/(x+1)=2x/(x-1)-(5/x)

232. ## algebra (f°g) problem

Find (f°g)(2) when f(x)=5x+9 and g(x)=1/x Thank you!

233. ## chemistry

While doing a titration lab to determine concentration of hydrogen peroxide what is the purpose of using an acid to dilute th H2O2?

234. ## Calculus- Vectors

I've come across this math problem and need help on working it out. Ropes 3 m and 5 m in length are fastened to a holiday decoration that is suspended over a town square. The decoration has a mass of 5 kg. The ropes, fastened at different heights, make

235. ## Math

Factor the trinomial completely. y to the 2power minus 2x minus 3=

236. ## Math

Factor the trinomial completely. y to the 3rd power minus 14y to the 2nd power plus 48y

237. ## Chemistry

Okay so I'm having a brainfart here. I'm doing a titration problem and have got to the point of: 3.6x10^9 = (.01218-x)/(x)(.00316+x) I don't know how to proceed from there and use the quadratic formula as silly as it sounds. Any help would be appreciated!

238. ## Math Statistical Concepts for Research

I am having trouble finding an article that incorporates research of confidence intervals to market a new product. I will need to Summarize the information and suggest if is it wise to go ahead and market the product. Do you any suggestions on a article I

239. ## math

sunita is 5year older than kavita the sum of thair age after 10 year will be 55year their present age is kavita 15 year and sunita 20 year how?

240. ## science

if aluminum has the density of 2.7g what would the mass be?

4xsquared=32

242. ## Math Statistical Concepts for Research

what is repeated sampling?

243. ## Accounting

1. Complete Problem 14.1 on page 279 of the course text (solution is on page 501-502). Next, work the problem again using the following variables: project yield annual net cash inflows are \$10,500 for the next five years; interest rate of 16.5%, and the

244. ## math

if 4/5 th strenght of a class is 80. what is the total strength of a class?

245. ## math

A bourbon that is 51-proof is 25.5% alcohol by volume while one that is 82-proof is 41% alcohol by volume. How many liters of 51 proof bourbon must be mixed with 1.0-L of 82 proof bourbon to produce a 66 proof bourbon? Give answer to three decimal places.

246. ## foundations of algebra

if 950 watts gives a 164 mile radius, how much power is needed to get a 150,000 square mile area?

247. ## Economics

Normally, higher interest rates in a country cause the ___ for that country's currency to increase as money flows to the higher interest rates. This depends on the perceived ___. For the first blank I have "demand", but I'm not sure about the second blank?

248. ## Math

Collision insurance is insurance that safeguards the owner of the vehicle from damages that occur from vandalism, weather, or theft. A. True B. False

249. ## Physics

A laser beam is being shot through two different materials that have been stuck together. if theta 1 = 65.5 and theta 2 = 49.8 what is the index of refraction? (I got 1.2 which is correct) but cant get part 2 PART 2~ If the index of refraction of n3 is

250. ## Physics

I am trying to help my step son who missed half of physics class due to a funeral. A laser beam is being shot through two different materials that have been stuck together. if theta 1 = 65.5 and theta 2 = 49.8 what is the index of refraction? (I got 1.2

251. ## english/writing

how can i write this sentence in a different way The Scarlet Letter was one of the first mass-produced books in the United States upon its release in 1850, and it received much praise and criticism for the novels supposed morbidity.

252. ## mechanics

A cat is sleeping on the floor in the middle of a 4m wide room when a barking dog enters with a speed of 1.8m/s. As the dog enters, the cat immediately accelerates at 0.85m/s^2 towards an open window on the opposite side of the room. The dog; a bit amazed

253. ## Math

A tea company is making a special blend of two teas for aa customer. The ratio of Kenyan tea to Darjeeling tea in the blend is 4 to 5. How much Darjeeling tea is in 90 ounces of the blend?

254. ## Chemistry

What is the difference in molecular chemistry between silicone polymers and other polymeric materials?

255. ## 7th Grade Language Arts

The word simulation originally refers to the act of imitating. What meaning of the word is used in this excerpt from "What Makes Teens Tick?" "In an experiment using a driving-simulation game, he studied teens and adults as they decided whether to run a

256. ## philosophy

I am to identify a film, television show, or other form of media art that involves cahracters/narrators reflecting upon the nature of identity and self. I want to write about Sex and the City. i was wondering do you think this would be a good topic. The

257. ## abc

Alice, Bob, Candice and David run for school president. There are 201 students in the school and each student can vote for only one candidate. The person with the largest number of votes is the winner. If every student votes, what is the minimum number of

258. ## closure propery

Is this set closed under multiplication {-1, 0, 1}

259. ## Math

The Additive Inverse Of 7 Is -7. True Or False

260. ## Life Orientation

5 recommendations on how to address pollution

261. ## Math (Combinatorics)

A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a

(2x-1)/(x+1)=2X/(X-1)+ (5/X)

263. ## calculating range

calculating the range of 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 Is the range 16-0 =16

1/(X-2)=3/(X+2)-(6X/(X^2-4)

265. ## chemistry/science

What are the groups of atoms inside iron called?

X^2-6X+1=(3X+5)/2

log4(3x-7)^2=10. I have no idea in working it out.

268. ## algebra

For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,-2_-3,7] was used to encode a phrase to

269. ## law

legal meorandum

270. ## math

will smeone please help me solve this question. Simplify the expression. Write your answer in the lowest terms ans leave it in factored form. __3y__ + ___4__ y(4y-1) 4y-1

271. ## math

will someone check to see if I have this question correct please. divide and simiplify to lowest terms. __2x^2-8_ divided by __x-4__ 5x-8 5x-8

272. ## math

how do i find the diameter of a circle c=44

273. ## civic education

ways you as an individual can improve your personal relationship between 2 weeks

274. ## Math

Always Line Up Decimal Points When Adding Rational Numbers. True Or False

275. ## art

Which aesthetic judges art on how well it expresses feelings moods and ideas

276. ## grade12 life orintation

which 5 ways you critically discuss how lifestyle disease/behaviour impact on the teenager (cancer)

277. ## math

There are 12 girls in one of the fifth grade classes. The number of girls is two-thirds the number of boys, b. The number of boys can be found using the equation 2/3b=12. How many boys are in the class?

278. ## Math

3 4/5 = 5*3+4/5. True Or False

279. ## maths

a trust fund has rs30000 that must be invested in two diferent types of bonds.the first bond pays 5% and second 7% interest per year. using matrix multiplication determine how to divide rs 30000 among two types of bonds if the trust must obtain na annual

280. ## Precalculus with Trigonometry

Draw and solve any triangles satisfying alpha = 20 degrees b = 10 c = 16

281. ## life orientation

in 10-15 lines critically discuss 5 ways in which hiv and aids impacts on the community

282. ## math

Which number makes this inequality true? 5•9

283. ## Math

When Multiplying Rational Numbers You Count The Numbers Of Decimal Place Values In The Fact. True Or False

284. ## math

find the value of k such that the equation e^(2x)=krootx has exactly one solution.

285. ## Math- Partial Fractions

Decompose the following into partial fractions after factoring the denominator as much as possible. Please show some work so I can understand how you did it. 1)x^2/((x-1)(x^2+5x+4)) 2)(3x^3-5x^2+12x+4)/(x^4-16) 3)1/(x^2 (x+1)^2 ) 4)(x+1)/((x^2+1)

286. ## English

Any drinks that start with Q? Doing this thing for school where we have 10 topics and 1 of them is drinks and I cant think of a drink that starts with Q. Name things of that topic from A-Z of the alphabet

287. ## math

solve and check your answer. Please check this for me to see if I have the right answer. __2__ = __3__ 1-x 1+x x= 1/5

288. ## math ugh.

at a small private collage, 9/20 of the students are female. there are 2160 female students, then how much are male?

289. ## chemistry

What will be the final pH value if you mix 50ml HCl (aqueous solution, pH=0.5) and 40ml NaOH (aqueous solution, pH=12). Hint: convert pH value to concentration of acids/base, then consider the neutralization reaction, then find out the resulting pH value.

290. ## cars

Which one of these statements is true about a "bumper-to-bumper" warranty.

291. ## Math

All Even Numbers Are To The Right Of Zero On A Numberline. True Or False

292. ## math

please check to see if I have this right. Divide and simplify to lowest terms. 2x^2-8x/5x-8 x-4/5x-8

293. ## Math

When You Add Fractions You Just Add Numerators And Denominators. true Or False

294. ## Chemistry

What is the difference in molecular chemistry between silicone polymers and other polymeric materials?

295. ## physics

The ion source in a mass spectrometer produces both triply and quadruply ionized species, X3+ and X4+. The difference in mass between these species is too small to be detected. Both species are accelerated through the same electric potential difference,