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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. 6,346 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. 5,510 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. 4,908 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. 4,764 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. 4,388 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. 3,758 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. 3,647 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. 3,281 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. 3,244 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. 3,136 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. 2,834 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. 2,781 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. 2,629 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. 2,615 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. 2,532 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. 2,469 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. 2,467 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. 2,364 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. 2,277 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. 2,226 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. 2,223 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. 2,205 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. 2,176 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. 2,112 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. 1,970 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. 1,960 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. 1,891 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. 1,889 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. 1,837 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. 1,824 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. 1,820 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. 1,783 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. 1,759 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. 1,757 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. 1,616 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. 1,519 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. 1,511 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. 1,496 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. 1,462 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. 1,457 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. 1,426 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. 1,381 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. 1,352 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. 1,330 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. 1,322 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. 1,320 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. 1,294 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. 1,279 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. 1,272 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. 1,262 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. 1,256 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. 1,247 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. 1,237 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. 1,214 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. 1,182 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. 1,182 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. 1,149 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. 1,137 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. 1,131 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. 1,125 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. 1,120 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. 1,114 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. 1,103 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. 1,097 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. 1,096 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. 1,072 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. 1,047 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. 1,021 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. 1,020 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. 1,004 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. 1,003 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. 1,003 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. 983 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. 982 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. 982 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. 980 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. 977 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. 974 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. 953 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. 932 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. 927 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. 915 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. 886 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. 885 views
A nation's factories, machines, etc. are it's_______capital._ _ y _ _ _ A _
1. 1 answer
2. asked by Anmol
3. 879 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. 863 views
Is calcium oxalate, CaC2O4, soluble in water?
1. 1 answer
2. asked by slim
3. 859 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. 859 views
short answer.Find the quotient.6x^3-5x^2-13x+13/2x+3
1. 0 answers
2. asked by Lueshelle
3. 856 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. 845 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. 834 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. 834 views
if you tossed two number cubes, what sum has the greatest probability of occuring? Explain.
1. 5 answers
2. asked by Alex
3. 801 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. 801 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. 798 views
graph solution set of system of inequalitiesx+y< 4 x-2y>6
1. 1 answer
2. asked by Anonymous
3. 788 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. 773 views
The angle of incidence of light passing from air to a liquid is 38 degrees.The angle of refraction is 24.5 degrees. What is the
1. 1 answer
2. asked by ******tasha******
3. 744 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. 741 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. 737 views

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