# Questions Asked onApril 5, 2011

1. ## Chemistry

Write a balanced equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, CaS.

2. ## chem

What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate? (: Begin by writing a balanced equation for the reaction between aqueous sodium bicarbonate and aqueous hydrochloric acid.)

3. ## english

i need to find the Verb, Subject, Linking Verb, Indirect Object, Direct Object, Subject Compliment and the Objective Complement and the preposition phrases. Here are the question and my answer, can someone tell me what I did wrong on theses, The computer

4. ## chemistry

prepare M/20 solution of oxalic acid. Find out the molarity and strength in gram per litre of the given solution of potassium permanganate with the help of the prepared solution of oxalic acid

5. ## physics

n object is dropped from rest from a height 5.8 × 106 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth? The acceleration of gravity is 9.81 m/s2 and the radius of the Earth is 6.37 × 106 m.

6. ## writing

Bill's manager has asked him to send all staff members the directions for checking out the new projector. In 1–2 sentences, describe what Bill should do. please help me start off don't really get it

7. ## chemistry

At what temperature (from your graph) do KNO3 and NaCL have same molar solubility?

8. ## algebra

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 +

9. ## chemistry

What substance is produced at the cathode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions.

10. ## physics

The steering wheel of a car has a radius of 0.18 m, while the steering wheel of a truck has a radius of 0.25 m. The same force is applied in the same direction to each. What is the ratio of the torque produced by this force in the truck to the torque

11. ## Chemistry

1.62 g of CoCl2 x (xH20) were heated. After heating only .88g of CoCl2 remained. What was the formula of the original hydrate?

12. ## Chemistry

What volume does a mixture of 14.2 g of He and 21.6 g of H2 occupy at 28 degrees celcius and 0.985 atm?

13. ## physics

a) If a photon and an electron each have the same energy of 20.0 eV, find the wavelength of each. b) If a photon and an electron each have the same wavelength of 250 nm, find the energy of each. c) You want to study an organic molecule that is about 250 nm

14. ## Chemistry 111

a)For the titration of an acid analyte with a NaOH titrant, a phenolphthalein endpoint will change from colorless to pink. If the "pink" resulted from perhaps only a half-drop(or less) of NaOH titrant and the Erlenmeyer flask is set aside on the laboratory

15. ## Chemistry

How fast should a 58.1g tennis ball travel to have a de Broglie wavelength that is equal to that of a photon of green light (5.40 X 10^3 angstroms)?

16. ## phi

11{2[3(11)35]}> Some politicians claim to support the environment in speeches they make around the country. However, to get to those speeches they ride in gas guzzling, pollution creating private planes. They therefore clearly don’t believe a word of

17. ## physics

A skater is gliding along the ice at 2.2 , when she undergoes an acceleration of magnitude 1.2 for 3.0 . At the end of that time she is moving at 5.8

18. ## physics

An accelerating voltage of 2.46 * 10^3 V is applied to an electron gun, producing a beam of electrons originally traveling horizontally north in vacuum toward the center of a viewing screen 34.0 cm away. What is the magnitude of the deflection on the

19. ## Physics

35 of copper pellets are removed from a 300 oven and immediately dropped into 120 of water at 20 in an insulated cup.What will the new water temperature be? I'm stuck on this problem and could use some help. I used q pellets = m · Cp · ΔT and q water =

20. ## Chemistry

A chemist wants to extract the gold from 15.0g of gold(II) chloride dihydrate, AuCl3 â€¢ 2H20, What mass of gold could be obtained from this sample?

21. ## Physics

In the rough approximation that the density of the Earth is uniform throughout its interior, the gravitational field strength (force per unit mass) inside the Earth at a distance r from the center is gr/R, where R is the radius of the Earth. (In actual

22. ## physics

A car travels along the curved path with radius of curvature p= 30m such that its speed is increased by at = (0.5e^t) m/s^2, where t is in seconds. determine the magnitudes of its velocity and acceleration after the car has traveled s = 18m starting from

23. ## Physics

I am stuck on this question and not really sure what to do for it. I think that i can use this equation Q/dt=e*sigma*A*T^4 for it, but i'm not getting the right answer for it. Is this not the right equation? Question: Electronics and inhabitants of the

24. ## chemistry

The correct electron configuration for the ion formed by sodium when producing an ionic compound with chlorine

25. ## physics

A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0840 T, it produces a Hall voltage of 0.660 µV. When it is used to measure an unknown magnetic field, the Hall voltage is 0.360 µV.

26. ## Physical Geography, Earth Science

How do you label a Tectonic Map of Hypothetical Ocean Basin? I have to draw in the plate boundaries.

27. ## chemistry

100 grams of a liquid completely fill a 200 ml bottle. What is the density of the liquid?

28. ## Trig

A 60 ft. antenna stands on top of a building, From a point on the ground, the angles of elevation to the top and bottom of the antenna measure 58 and 44 respectively. How tall is the building

57. ## Physics Simple Harmonic Motion

A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. Suppose the needle moves 8.4 mm from its highest to its lowest position and it makes 27 stitches in 8.5 s. What is the maximum needle speed?

58. ## Chemistry

what tests can be run to identify the cation and anion of an ionic compound?

59. ## math

solve this linear programming problem; A chain saw requires 4 hours of assembly and a wood chipper 6 hours. A maximum of 48 hours of assembly time is available. The profit is $150 on a chain saw and$220 on a chipper. How many of each should be assembled

60. ## math

A rectangle is 3 times as long as it is wide, it's area is 108 square centimeters. What is the length? what is the width?

61. ## physics

You look up and see a helicopter pass directly overhead: 3.10-s later you hear the sound of the engines. If the air temperature is 23.0°C, How high was the helicopter flying?

62. ## science

A ship sailed 15 km north, then 20km east followed by 10km south. Find its displacement from its starting point

63. ## statistics

For every 100 births in the U.S., the number of boys follows, approxiamately, a normal curve with a mean of 51 and standard deviation of 5 boys. If the next 100 births in your local hospital resulted in 36 boys (and thus 64 girls) would that be unusual?

64. ## general

From a standard deck of 52 cards, all of the clubs and the jack of diamonds are removed. Two cards are drawn at random from the altered deck without replacement. What is the probability that both cards will be of the same suit? Justify your answer, which

65. ## Physics

Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

66. ## Geometry

Find the area of a circle circumscribed about a regular hexagon with an apothem of 5 inches. Round to the nearest tenth

67. ## Physics

Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

97. ## maths

b) if the surface area of the base is increased by times its original surface area,(with the same vertical height),calculate the new surface area of the pyramid.

98. ## Chemistry

Calculate mass of silver nitrate needed to prepare a solution of concentration 0.01 moles per liter.

99. ## English

What is the structure and language of the poem Young by Anne Sexton?

100. ## math

how would you solve.... 15x + 50 + x to the second power....

101. ## chemistry

If you used 0.500 grams of Mg and an excess of HCL, how much hydrogen gas should be produced at STP

102. ## psychology

which statement about anorexia nervosa is ture? a.) sufferers are usually males between the age of 12 and 40. b.) people with the disorder may well be attractive and successfull. c.) anorexics almst never starve to death, although they may die from other

103. ## Physics-Help-I'm Stuck

If a balloon is made of Mylar(alumized plastic) instead of rubber, would it stick to a wall if you rubbed the balloon against a wool sweater? If a charged balloon is held a distance "d" above some paper bits they start to move. If the balloon is moved half

104. ## Economics

1. You read the following information about the economy: Real GDP up three percent from a year ago. Unemployment rate of 6.1 percent. Consumer Price Index up six percent from a year ago. Index of Leading Indicators up for the last six months. Prime

105. ## Chemistry

In this equilibrium H2(g) + I2(g) 2 HI(g). What is happening on the molecular level? Like given the right energy when a H2 molecule hits a I2, is electron transfered and they just stick together? Or do they have to be in the right position? Who transfers

106. ## physics

The sound of heavy automobile traffic, heard at a certain distance, has a sound level of about 75 dB. What is the intensity of the noise there? answer in W/m^2.

107. ## Geometry

A science lab needs a right circular cylindrical container that holds 15 gallons of liquid & is 24in tall. A reference manual states that 231 cubic inches is equivalent to one gallon. What is the approximate radius, in inches, or the container?

108. ## Maths

The product of two consecutive positive numbers is 42 Find the numbers Please write this problem in quadratic equation form please

109. ## chemistry

given the following info for water molar heat of fusion 6.02kj/mol calculate the total quanity of heat evolved when 10.0g of steam is condensed,cooled,and frozen to ice at -50 degrees

110. ## Physics Simple Harmonic Motion

The displacement of an object in SHM is given by y(t) = (7.0 cm)sin[(1.58 rad/s)t]. What is the frequency of the oscillations?

111. ## physics

A game of darts involves throwing two darts at the board. Hitting a blue region with a dart scores 1 point; a red region, 2 points, a green region, 3 points, and the orange region, 5 points. Assume that no skill is involved. What is the probability, stated

112. ## Maths

The sum of the squares of three consecutive positive integers is 365 What are these integers? Please write this problem in quadratic equation form please

142. ## physics

Sound spreads radially in all directions from a source with power 15.3 W. If the intensity you experience is 3.00×10−6 W/m2, how far away are you from the source? answer in meters?

what is the prime factorization of 24? f.)8x3 g.)4x3x2 h.)2x2x2x3 j.)2x3x2

144. ## social studies

Compare & Contrast the pros and cons of textbook social studies learning?

145. ## Geography

IN the US the river that forms the border between mexico and US is called the rio grande. What is it called in Mexico? Any idea?

146. ## Biology

. A woman whose father was color blind (X-linked, recessive) and who has type A blood has accused a man who is himself color blind of fathering her child. The accused man has type B blood. For each of the following cases, indicate whether or not the man

147. ## history

Wall paintings from Etruscan tombs depict a society that was seemingly A. sexually open. B. segregated with respect to gender. C. austere and sexually repressed. D. simple and didn't depict the human form.

148. ## English

I don't really know where to begin with this paragraph. My instructions are to type and revise the following paragraphs so that they’re easy to read as a presentation. Use simple sentence structure. Use correct placement of old and new information. Human

149. ## Env.Microbiology

write down the '' balance sheet''(carbon,electron,ATP,etc)for the fallowing metabolic process: -use the most common alternatives. -Give the balanced overall reactions with correct stoichiometry -İndicate all key reactans and products. -calculate how many

150. ## physics

Calculate the frequency in hertz and cm-1, as well as the energy in joules and electron volts of an x-ray photon with a wavelength of 4.55 angstroms.

151. ## Chemistry

How do you calculate the volumes of the acid solutions (1.50M HCl, 1.50M HNO3, and 1.50 M H2SO4?

152. ## science

what is the main idea for Joule and give a detail to it and an example. Also for calorie, kilocalorie and caloric values.... I need help I don't know what is their main idea and detail and example..

153. ## computer question

new computer viruses and other types of malware are released all the time. Identify a current virus or worm (most security companies, such as Symantec and McAfee, list the most recent security threats on their Web sites) and asnswer the following

154. ## CHEMISTRY

The chemical and engineering properties of cement are very important in the construction industries. One of the four principle chemical compounds in Portland cement in tricalcium silicate, 3CaO.SiO2. Calculate its molecular/formula weight?

Find the antiderivative by hand in each case. S stands for the integral sign A) S x*sqrt(10 + x^2) dx So, u= 10 + x^2 du= 2xdx du/2= xdx (1/2) S sqrt(u) du (1/2)*((u^(3/2))/(3/2)) (1/2)*(2/3)*(u^(3/2)) (1/3)*(u^(3/2)) = (1/3)*(10 + x^2)^(3/2)

156. ## Phar Science

The following data were obtained for solutions of carboxymethylcellulose flowing through a capillary viscometer. Concentration (g/L) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.8 Time (s) 64.2 68.4 72.7 77.1 81.5 86.1 91.0 100.5 The Mark-Houwink-Sakurada parameters for

write a decimal and 45/90 in simplest form

158. ## math

stacy multiplied 5x9 and said the answer was 44. what two patterns could you use to show that her answer is not correct?

159. ## English - Native speakers

Another one! Why can't we say this stain remover is very efficient. Why do we say effective? What is the difference? What are facilities and what amenities? When do we use specimen and when sample?

160. ## Biology

In Siberian Huskies base fur color is represented by black & white fur BB, tan/yellow & white fur Bb, and white only fur bb. Siberians all posses two style of fur wire hair (W_) and smooth (ww). What would the genotype and phenotype frequencies be for a

161. ## English/Writing

I have to use all these words in one long sentence and the sentence has to make sense. Its on Essay Analysis...HELP>>> here are all the words analyse review comment coherent order clear balanced logical convincing for against pros cons breakdown overview

162. ## Math (Reflection across y=x line)

Here's a question that I am having trouble with: What is the resulting equation when y=x^3+2x^2 is reflected across the y=x line? I know that I need to switch the y with the x's in the equation, so is the answer they're looking for simply x=y^3+2y^2 or do

163. ## Math

10^9, 10^-8, 10^5, 10^-6, 10^0 Put in order from least to greatest.

164. ## English

I forgot to ask you to check these sentences . Thank you for your help. 1)I forgot to add the following sentences. 2)I like sunbathing on the beach. I didn't go on the rides because I'm afraid of heights. 3)I'm looking for a hotel with air-conditioning,

165. ## physics

f a typical family of four uses electric energy at an average rate of 458 W, how many kWh would their electric bill be for one month? Answer in kW

166. ## Chemistry

you measure 5.3g of KOH and dissolve it in enough water to make 400 ml of solution. what is the molarity of this base? You want to neutralize this base with a 3.7M H2SO4. How much sulfuric acid is necessary to do this? x=5.3g/39+16+1 = 5.3/56=.095m

167. ## Principles of Marketing

Describe the situation that would lead to the use of the three different buying process for a particular product lightweight bumpers for a pickup truck

168. ## physics

15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.000550 W/m2. What is the rate at which the source is emitting sound energy? answer in Watts.

what does 12/15 - 7/15 equal,in simplest form?

170. ## kbcc

A car is initially traveling at 5 m/s when its begins its ascent up a 30 degree incline.how far up does the car travel before coming to rest

171. ## CHEMISTRY

What is buffer, and how does it affect the pH of a solution?

172. ## maths

calculate the longest and the shortest perimeter possible that encloses and area of 9m..16m..25m..36.. can u tell me please

220. ## Science

Ms. Sue. I am studying latitude, elevation, nearby water, ocean currents, prevailing winds, topography and vegetation. Thank you so much

221. ## math

Ben can complete 4 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete 17 math problems?

222. ## English

My instructions are to type 200 to 225 words of a short presentation on a topic of my choosing. I was wondering if you could please check my grammar and sentence structure in this Informative Essay. Breathing is something most of us take for granted;

223. ## Science

Why do all planets revolve around the sun?

224. ## geometry

I have a quadrilateral which is a rhombus and E is at the intersection and DE =2x+4 and DB=6X. How do I solve for x and DB?

225. ## Chemistry

How can you tell if a molecule is polar or non-polar

226. ## Chemistry

what are the relative strengths of the different intermolecular forces?

227. ## Managerial Accounting

Determining and interpreting flexible budget variances Use the standard price and cost data supplied in problem 15-18. Assume that Holligan actually produced and sold 31,000 books. The actual sales price and costs incurred follow. Actual price and variable

228. ## English

I still have a few doubts on school rules. I hope you can have a look at them. It's urgent. 1)You mustn't dirnk or eat during lessons/school hours. 2) You mustn't ask questions when your teacher explains/is explaining/during explanations. 3) You must take

229. ## english

Hi, i have to write a research paper on a topic related to may major, education (birth through five), can someone give me a good topic to write about? I'm new to this major so I don't have any ideas on what the the major topics are in this field, please

230. ## Lab Math

How to prepare a 0.8% agarose gel with TAE. It does not give the concentration of the TAE so I am not sure how to prepare this gel. Thanks

231. ## grammar

in classifying a sentences u underline the _______ parts once and the ________ parts twice? can someone please help my daughter

232. ## CHEMISTRY

The density of alcohol at 20 degrees celcius is 0.79g/ml. Calculate the weight of 1Litre of alcohol?

233. ## physics

A box weighing 50N was placed on a sloping plane inclined at 30degree to the horizontal. It was acted on by the force 50n. Find the perpendicular and parallel compönent

234. ## social socials

Americans are united by their strong belief in basics principles.They believe that people are born with privileges that cannot be taken away from them. These are what?

235. ## Modern History

Hi! I need a good website which talks about how many people Stalin had executed and the mock trials... Thanks! Tasha

236. ## Biology HELP

Triaglyceride with three F.A.chains of 20 carbon how to calculate the ATP production Plz show the steps thank you

which expression represents the phrase three more than f? a.)3-f b.)f+3 c.)34+3 d.)f-3

238. ## Math

Vera wrapped a package that measured 8 in. by 10 in. by 5 in. Find the surface are of the package. I really don't know why I'm having trouble with this problem, but for some reason I just don't know where to start it.

239. ## English

1. I (past, passed) the library on my way to the grocery store. 1. past

240. ## Geometry

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

241. ## world history

What are the position for nationalist revolutions for Britain, Prussia, Austria, France and Russia at the congress of troppau?

242. ## math

which fractions are larger, 5/6 or 10/12 6/12 or 4/6?

250. ## algebra

Create an equation of a nonlinear function and provide two inputs

251. ## geography

how many centuries has gold been mined in mexico?

252. ## grammar

what is the role of education in successful financial planning?

253. ## Algebra

Is this simplified? 6a2 + 4a2b - 4ab - 3b *The 2's are exponents

254. ## physics

find the total positive charge in 200gram of water

255. ## English

I recently wrote an essay in English class and when I got it bcak I noticed that some of the words have agr or agr. over them. For example, most of them are over the words: their and they. I know it sounds confusikng, but if anyone can help, please do so.

my daughter came home with input/output table don't understand how to do it Input Output 4 33 5 36 11 54 16 69

257. ## Calc.

Find the value of the definite integral using sums, not antiderivatives: int= integral sign int((x + 2)/(x^(3/2)),x= 16..25)dx Please help... even just showing me how to get started would be greatly appreciated.

259. ## French

I am trying to say "When one person has a loss, another could perhaps benefit." This is what I have: Quand une personne a une perte, une autre peut-etre pourrait profiter a la perte. Was I supposed to have used conditional? And do you notice any errors?

260. ## maths

a) Construct a right square pyramid with your choice of dimensions (maximum base of 5 by 5 units). base dimensions: Slant height: Calculate its surface area

261. ## chemistry

how many atoms are in 0.320 moles of aluminum?

262. ## Phar Science

In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for

263. ## English

1) Last June she drove with her older brother from their house in Oregon to her brother's new apartment in North Carolina. 2) She realized only afterwards that she should have listened to her mum's advice. 3) The trip really changed my life since it showed

264. ## ENG 225

I NEED HELP ON ENG 225 WEEK 5 DQ#1. Do you think that films,in general, influence society or does society influence what is presented in films?

265. ## english

Whats the opposite of seditious

266. ## music

So, in G/B, B is the descending bass line under the G chord. The G chord I normally play is 300023. So, is the last string/note played whatever is closest to string 6 or whatever is closest to string 1? Is this an understood rule? I mean how do you decide

267. ## Chemistry; Check

1. The amount of heat absorbed in a chemical reaction is measured with a thermometer. a. true b. false answer: False

268. ## billing and coding

pick 3 firms to research. based on internet reseach on these companies write a 500-750 word reseach paper proposing at least three marketing opportunities that you would strongly suggest that each firm pursue

269. ## Algebra

6x^2+9cx= 6c^2 I tried moving the 6c^2 to the other side of the equation, then factoring (36) to arrive at (6x^2+12cx) (-3cx-6c^2)...then....6x(x+2c) -3c(x+2c)...but I am not getting it? The answer in the book is...-2c, c/2?

270. ## spelling

ho do you spell completly

271. ## Math

Let R be the plane region bounded by x=1, x=5, the x-axis and y=1/x. Approximate the are of R using 8 right rectangles.

272. ## Phar Science

A researcher in Urumqi drops a rhodium ball of diameter 4.20 mm through a dilute aqueous solution of a high molar mass natural gum contained within a glass tube which has four graduations marked 10 cm apart. It is 18 C in the laboratory and the ball takes

273. ## english

Could you please help me locate the adjectives and adverbs in the below paragraph? St. Louis is most often considered to be Cardinals Nation. The greatest day in St. Louis is opening day of baseball. The St. Louis Cardinals are a professional baseball team

274. ## English

What is the role of art in people’s life?

275. ## millmottr

write the related addition statement 8-3=5

276. ## English

1. You (passed, past) the boat launch a few miles back. 2. The bus drove (passed, past) the bus stop without stopping. 1. passed 2. past

277. ## Math

Mrs.dude is buying 2 pounds of chocolate for \$7.50 . Write an expression to find the cost of 4.5 pounds of chocolate

278. ## math

at the animal show 3/4 liked the dogs best. 2/6 of them like the great dane the best.what fraction liked the great dane the best?

279. ## Math

can you figure out this problem? 10c+c(c-4)

280. ## general biology

why is yeast used in the experiment of respiration?

281. ## algebra

x squared-4x-5 your factoring each expression.

282. ## medical assisting

imformation should include____________,_____________, and ________, procedures

283. ## Geography

this body of freshwater in mexico is also home to marine life. I am confused... Only lake Baikal in Russia comes up.

284. ## math

5+(3x3-3) / 2 =

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

286. ## Algebra 1

What is 1/9+1/y=4/y

287. ## math

thanks so much ms sue!!!!!!!!!

288. ## maths

5/6*(18/25-9)