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2012
April

Questions Asked on April 11, 2012

Calculate the pH of the resulting solution if 30.0 mL of 0.300 M HCl(aq) is added to(a) 35.0 mL of 0.300 M NaOH(aq). (b) 40.0 mL
1. 3 answers
2. asked by anon
3. 6,365 views
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-]
1. 4 answers
2. asked by DAN
3. 5,568 views
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C−1). At room temperature
1. 1 answer
2. asked by anthony
3. 4,936 views
28. A 20-N force applied to the handle of a door produces a 44-N output force. What is the AMA of the handle? Show your work.
1. 3 answers
2. asked by Ms. Simpsonizer
3. 4,784 views
A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm
1. 1 answer
2. asked by johnny
3. 4,432 views
A 40-g block of ice is cooled to−71°C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of
1. 2 answers
2. asked by anthony
3. 3,793 views
The figure below shows two current carrying wires and the directions of the currents they carry. The wires carry the following
1. 2 answers
2. asked by Jessica
3. 3,678 views
1) Using the 1st equivalence point from part a calculate the molarity of the phosphoric acid. Molarity of NaOH = .1523 MVolume
1. 4 answers
2. asked by Maura
3. 3,307 views
two billion,six hundred million in expanded notation using powers of 10(2x 10^11) + (6x10^8) would that be correct??
1. 3 answers
2. asked by jill
3. 3,265 views
Hydrogen Peroxide decomposes to produce oxygen gas and water, What mass of hydrogen peroxide (H2O2) nust decompose to produce
1. 3 answers
2. asked by whale
3. 3,177 views
Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 7.5X10^4 A flowing for a period of 24 hours.
1. 2 answers
2. asked by Nikolai
3. 2,869 views
At a certain temperature the vapor pressure of pure benzene is measured to be 322. torr . Suppose a solution is prepared by
1. 2 answers
2. asked by Elizabeth L.
3. 2,815 views
a ball striking a horizontal plane with a velocity v rebounds with a velocity 256v/625 after 4th collision. the coefficient of
1. 5 answers
2. asked by srikala
3. 2,664 views
What would the final freezing point of water be if 3 mol of sugar were added to 1 kg of water (Kf = 1.86C/(mol/kg) for water and
1. 2 answers
2. asked by james
3. 2,632 views
A stream moving with a speed of 0.5 m/s reaches a point where the cross-sectional area of the stream decreases to one-fourth of
1. 1 answer
2. asked by Zion
3. 2,552 views
23. During the period of human history known as the ____, human populations grew rapidly because of advances in farming methods.
1. 5 answers
2. asked by mysterychicken
3. 2,497 views
What amperage is required to plate out .250 mol Cr from a Cr+3 solution in a period of 8.00 h?
1. 1 answer
2. asked by Alan
3. 2,489 views
what effect did scientists originally think that the intensity of light shining on a photosensitive surface would have on
1. 2 answers
2. asked by aaa
3. 2,391 views
A body of weight 500N is lying on a rough plane inclined at angle 3.2 with the horizontal. It is supported by an effort p,
1. 1 answer
2. asked by mustapha
3. 2,305 views
a man of 50kg is standing on one end on a boat of length 25m and mass 200 kg .if he starts running and when he reaches the other
1. 3 answers
2. asked by srikala
3. 2,251 views
The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and (delta) E for melting 1.00 mol of ice at 0 deg. C
1. 1 answer
2. asked by AChem
3. 2,250 views
The weightless horizontal bar in the figure below is in equilibrium. Scale B reads 4.00 kg (N.B. as you know, the scale should
1. 2 answers
2. asked by James
3. 2,235 views
A 40-kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.0 m/s and the final speed is
1. 2 answers
2. asked by anthony
3. 2,220 views
Ammonia (NH3) boils at -33oC; at this temperature it has a density of 0.81 g/cm3. The enthalpy of formation of NH3(g) is
1. 1 answer
2. asked by Morgan
3. 2,165 views
1. The surface tension in a cup of water is caused by ____.(1 point)attractive forces between the water and its container
1. 19 answers
2. asked by jhai9
3. 1,996 views
A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can
1. 2 answers
2. asked by Angelina
3. 1,994 views
Which answer best describes the purpose of the muscles in the human body?A)to protect tissues and form blood B)to remove and use
1. 5 answers
2. asked by Sally urgenttt
3. 1,966 views
I need help ASAP!Colligative Properties- Ethylene glycol (C2H6O2) is the principal ingredient in antifreeze. How many grams of
1. 1 answer
2. asked by Kelsey
3. 1,913 views
Write a rule for the linear function in the table.x f(x) –4 16 0 0 4 –16 8 –32 A. f(x) = –4x B. f(x) = x + 16 C. f(x) =
1. 4 answers
2. asked by nay nay
3. 1,854 views
A wet bar of soap slides freely down a ramp 2.0 m long inclined at 6.8o. How long does it take to reach the bottom? Neglect
1. 3 answers
2. asked by myra
3. 1,851 views
a pendulum consists of a wooden bob of mass m and length l. A Bullet of mass m1 is fired towards the pendulum with a speed
1. 4 answers
2. asked by srikala
3. 1,849 views
Identify whether each description best applies to a periodic or a perpetual inventory system.a. Provides more timely information
1. 1 answer
2. asked by Mar
3. 1,814 views
Cellular Phone Sales The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown
1. 1 answer
2. asked by Victor
3. 1,787 views
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of
1. 2 answers
2. asked by bill
3. 1,786 views
1. As a sample of matter is cooled, which property of its particles increases? (1 point)average kinetic energypressure buoyancy
1. 11 answers
2. asked by NIKE
3. 1,649 views
1. You want to survey people about their favorite exercise. Which sample below is more likely to be random? (1 point)You ask
1. 4 answers
2. asked by NIKE
3. 1,546 views
Using the Internet, encyclopedia, and/other reference material for research, write a 1,000-word report on feudalism in the
1. 4 answers
2. asked by greg
3. 1,544 views
The decomposition of potassium chlorate, KClO3, gives oxygen gas and solid potassium chloride. How many grams of KClO3 are
1. 1 answer
2. asked by Emily
3. 1,539 views
1. The surface tension in a cup of water is caused by ____.(1 point)attractive forces between the water and its container
1. 4 answers
2. asked by jhai9
3. 1,487 views
When 50.0 mL of 0.050 M formic acid, HCHO2, istitrated with 0.050 M sodium hydroxide, what is the pH at the equivalence point?
1. 1 answer
2. asked by chamy
3. 1,484 views
A map has a scale of 1/2 inch to 4 miles. The shortest distance between two cities on the map measures 8 inches. If d represents
1. 1 answer
2. asked by sarah
3. 1,444 views
26 g of methane CH4 has a pressure of 450 kPa at 250 degrees celcius find the volume occupied by the gas
1. 2 answers
2. asked by db
3. 1,403 views
Which number serves as a counterexample to the statement below:All positive integers are divisible by 2 or 3 I need as much as
1. 3 answers
2. asked by Lana Von Monroe
3. 1,375 views
When 0.5 mole of CO2 and 0.5 mole of H2 were forced into a litre reaction container, and equilibrium was established:CO2(g) +
1. 1 answer
2. asked by Anonymous
3. 1,354 views
helga needs to lay out her newly created pivot table.what are the two ways she can set up a pivot table?(a)when helga created
1. 0 answers
2. asked by susue
3. 1,351 views
1. In a typical rural village in Mexico, you might expect to find that most people living on farms get their food by (1
1. 8 answers
2. asked by NIKE
3. 1,345 views
An alpha particle (charge = +2.0e) is sent at high speed toward a gold nucleus (charge = +79e). What is the electric force
1. 1 answer
2. asked by brooke
3. 1,321 views
A ball bounces to 45 percent of its original height.What fraction of its mechanical energy is lost each time it bounces? What is
1. 2 answers
2. asked by Amber
3. 1,304 views
Children and adolescents are considered to be reflected in which age group?A. 6-17 years old B. 3-17 years old C. 5-17 years old
1. 7 answers
2. asked by emily
3. 1,291 views
Some helium at 20.0psi gauge pressure occupies 40.0ft^3. find its volume at 32.4 psi if the temperature remains constant.
1. 1 answer
2. asked by Sharon
3. 1,282 views
two perfect elastic balls of same mass m are moving with velocities u1 and u2 . they collide elastically n times. the kinetic
1. 2 answers
2. asked by srikala
3. 1,278 views
What volume will 12.0 g of oxygen gas occupy at 25 degrees celcius and a pressure of 52.7 kPa?
1. 1 answer
2. asked by Anonymous
3. 1,265 views
The triation of 50.00 mL of 0.025 00 M MES with 0.100 0 M NaOH. MES is a weak acid with pKa=6.27. Compute Ve, first. Show what
1. 1 answer
2. asked by Lance
3. 1,259 views
The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was
1. 3 answers
2. asked by lara
3. 1,246 views
a simple pendulum of length 0.2m has bob of mass 5gm, it is pulled aside through an angle 60 degrees from the vertical. a
1. 5 answers
2. asked by srikala
3. 1,209 views
Sharon brought 12 apples to the picnic. After the picnic, 2 apples were left. What fraction of the apples were eaten.
1. 5 answers
2. asked by Sue
3. 1,199 views
For the titration of 50.00 mL of 0.1000 M ammoniawith 0.1000 M HCl, calculate the pH (a) before the addition of any HCl
1. 1 answer
2. asked by chamy
3. 1,171 views
ok so the point are A(3,0) and B(-4,6)and the question asks : the images of points A and B after a reflection in the line y=x.
1. 2 answers
2. asked by Jessica
3. 1,161 views
A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog
1. 0 answers
2. asked by Nelson
3. 1,155 views
The chart below shows an expression evaluated for four differentvalues of x x: x2+x+5: 1 7 2 11 6 47 7 61 Josiah concluded that
1. 1 answer
2. asked by Lana Von Monroe
3. 1,154 views
Please check my project to see if it's good. LET ME KNOW IF THERE ANY GRAMMERS, OR ERRORS!!! I hope you love my project I had
1. 3 answers
2. asked by Laruen
3. 1,139 views
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-]
1. 1 answer
2. asked by DAN
3. 1,129 views
An object of mass 200.0kg is moving from rest under the influence of net force 1.0Kn.Find the acceleration of the object and
1. 0 answers
2. asked by ******tasha******
3. 1,129 views
At room temperature (about 20C) milk turns sour in about 64 hours. In a refrigerator at 3C, milk can be stored for about three
1. 3 answers
2. asked by Kenzie
3. 1,128 views
the molar heat capacity of water at 25 degrees celsius is 75.29JK/mol. an exothermic reaction with -5.00kJ proceeded to
1. 1 answer
2. asked by ayanda
3. 1,120 views
The Giant Ferris Wheel has a radius of 30meters. Assuming that a time t= t_0 , the wheel rotates counterclockwise with a speed
1. 0 answers
2. asked by Thongfye
3. 1,093 views
Select the equation that solves this problem:Eight coins (dimes and nickels) are worth 60 cents. How many dimes are there? a.
1. 2 answers
2. asked by Cheril
3. 1,065 views
Volume of 1200 L of helium at 4000 Pa is heated from 45.0°C to 75.0°C increasing the pressure to 6000 Pa. What is the
1. 1 answer
2. asked by Madison
3. 1,037 views
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C−1). At room temperature
1. 0 answers
2. asked by greg
3. 1,036 views
Nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). Write a balanced equation for this reaction.
1. 1 answer
2. asked by Kenzie
3. 1,031 views
A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe
1. 0 answers
2. asked by Malika
3. 1,024 views
If the proceeds of a pension plan are being distributed and the original beneficiary dies, the:A. person who inherits the plan
1. 0 answers
2. asked by Andy
3. 1,019 views
Would this be a good start to a short story? And what do you think i should say next?? This is for two things, my English class,
1. 1 answer
2. asked by Paisley Jane
3. 1,010 views
What items appear in financial statements of merchandising companies that do not appear in the financial statements of service
1. 0 answers
2. asked by Mar
3. 1,007 views
The Seventh Amendment to the United States Constitution, which was ratified as part of the Bill of Rights, codifies the right to
1. 3 answers
2. asked by Laruen
3. 1,004 views
A cylindrical 7.00-kg reel with a radius of 0.60 m and a frictionless axle, starts from rest and speeds up uniformly as a
1. 1 answer
2. asked by Julia
3. 1,001 views
entering the formula=SUM(C5:C18)is cell C19 will resolve in which of the following?(a)cells C5 and C18 will be added together
1. 1 answer
2. asked by susue
3. 1,000 views
Ms. Sue. I just wanted to say I think you are a very helpful, nice,smart and intelligent woman. Thanks for your help. :)Thank
1. 3 answers
2. asked by ♥rebel•stupidity=kathy♥
3. 996 views
The width of a rectangle is x inches long. The length of that rectangle is 5 inches less than Twice the width. If the perimeter
1. 1 answer
2. asked by KP
3. 989 views
A one pound piece of iron was heated to 1000 °Cand then quenched in a bucket containing one gallon of water at 25 °C. What was
1. 1 answer
2. asked by Anonymous
3. 956 views
The Welsh language is an important reason why Wales is a unique part of the United Kingdom. After reading about the origins of
1. 2 answers
2. asked by ♥rebel•stupidity=kathy♥
3. 944 views
8th AmendmentThe Eighth Amendment to the United States Constitution is the part of the United States Bill of Rights prohibiting
1. 3 answers
2. asked by Laruen
3. 938 views
a standard deck of playing cards contaons 52 cards in for suits of 13 cards each. two suits are red and two suits are black.
1. 1 answer
2. asked by Anonymous
3. 917 views
a secant-secant angle intercepts arcs that are 3/5 and 3/8 respectively. Find the measure of the secant-secant angle.
1. 0 answers
2. asked by Kate Jenson
3. 912 views
A nation's factories, machines, etc. are it's_______capital._ _ y _ _ _ A _
1. 1 answer
2. asked by Anmol
3. 895 views
Calculate the partial pressure of helium in a 1.00 L flask that contains equal numbers of moles He, Ne, and Ar at a total
1. 1 answer
2. asked by Randy
3. 881 views
short answer.Find the quotient.6x^3-5x^2-13x+13/2x+3
1. 0 answers
2. asked by Lueshelle
3. 878 views
Given that AB is a tangent of the circle with the center at X, AB = 12, and XD = 2.5, which is the length of DB?
1. 1 answer
2. asked by Anonymous
3. 876 views
Is calcium oxalate, CaC2O4, soluble in water?
1. 1 answer
2. asked by slim
3. 875 views
when working with predefined formulas in excel,what category contains the boolean functions?(a)math and trig (b)recently used
1. 1 answer
2. asked by susue
3. 863 views
a ball of mass m , moving with uniform speed, collides elastically with another stationary ball.the incident ball will lose
1. 1 answer
2. asked by srikala
3. 861 views
Household vinegar is acqueous 5.00%,acetic acid solution(by mass),if its density is 1,01 g/ml.calculate the mole
1. 1 answer
2. asked by Marcia
3. 851 views
A charge of 2.1 nC and a charge of 4.7 nC are separated by 57.90 cm. Find the equilibrium position for a -4.7 nC charge.
1. 2 answers
2. asked by jared
3. 828 views
Which of the following is the most effective buffer system for a pH value of 7.45? Assume all are 1MA. Carbonic acid and sodium
1. 1 answer
2. asked by Linda
3. 828 views
if you tossed two number cubes, what sum has the greatest probability of occuring? Explain.
1. 5 answers
2. asked by Alex
3. 818 views
graph solution set of system of inequalitiesx+y< 4 x-2y>6
1. 1 answer
2. asked by Anonymous
3. 800 views
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of
1. 1 answer
2. asked by bill
3. 795 views
the table below shows the approximate population for the 10 least populated countries in the world.use the data to estimate
1. 2 answers
2. asked by Celest
3. 785 views
Suppose $5000 is deposited in a bank account that compounds interest four times per year. The bank account contains $9900 after
1. 0 answers
2. asked by Patty
3. 773 views
A hollow aluminum cylinder 22.0 cm deep has an internal capacity of 2.000 L at 21.0°C. It is completely filled with turpentine
1. 0 answers
2. asked by anthony
3. 768 views

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