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2012
April

Questions Asked on April 28, 2012

When the equation for the following reaction in basic solution is balance, what is the sum of the coefficients?MnO2 +
1. 3 answers
2. asked by Wube
3. 9,119 views
For the following fusion reaction, Calculate change in energy per mole.( Answer in J/mole)2H1 + 2H1 ---> 3H1 + 1H1 (the mass
1. 3 answers
2. asked by Mima
3. 9,086 views
A voltaic cell is constructed with an Ag/Ag+ half-cell and a Pb/Pb2+ half-cell. Measurement shows that thesilver electrode is
1. 3 answers
2. asked by anonymous
3. 8,720 views
Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5
1. 2 answers
2. asked by Elizabeth
3. 5,207 views
A 50.0kg cyclist on a 10.0kg bicycle speeds up from 5.0m/s to 10.0m/s , the total kinetic energy before acceleratingis 750, and
1. 8 answers
2. asked by Melissa
3. 4,253 views
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is
1. 2 answers
2. asked by Turk
3. 3,986 views
A mass of 0.4113 g of an unknown acid, HA, is titrated with NaOH. If the acid reacts with 28.10 mL of 0.1055 M NaOH, what is the
1. 2 answers
2. asked by Tiffany
3. 3,704 views
A fossil is found to have a C-14 level of 86% compared to living organisms. How old is the fossil?, (the half life of C14 is
1. 6 answers
2. asked by Mima
3. 3,226 views
in a reflection the image of the line y-2x=3 is the line 2y-x=9.find the axis of reflection.
1. 15 answers
2. asked by amir
3. 3,135 views
An ice cube at 0.00 degree celsius with a mass of 23.5 g is placed into 550.0 g of water, initially at 28.0 degree celsius, in
1. 4 answers
2. asked by Amir
3. 2,928 views
A piece of metal of mass 112g is heated 100 degree C.,and dropped into a copper calorimeter of mass 40g containing 200g of water
1. 2 answers
2. asked by kala
3. 2,851 views
If 0.150 moles of salicylic acid and execs acetic anhydride are used during a synthesis of aspirin, how many grams of aspirin
1. 3 answers
2. asked by Tiffany
3. 2,768 views
A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b)
1. 1 answer
2. asked by Chi
3. 2,751 views
A projectile is launched vertically from the surface of the Moon with an initial speed of 1500.At what altitude is the
1. 3 answers
2. asked by Turk
3. 2,534 views
A particle has a kinetic energy equal to its rest energy.(a) What is the speed of this particle? (b) If the kinetic energy of
1. 1 answer
2. asked by martini
3. 2,163 views
A plumb bob (a mass m hanging on a string) is deflected from the vertical by an angle θ due to a massive mountain.A) Make an
1. 2 answers
2. asked by Brett
3. 2,099 views
what mass of sodium chloride will be required to completely react with 4.00 x 10(24) units of AgNO3 and form AgCl and sodium
1. 2 answers
2. asked by RoseBud
3. 2,074 views
A scuba diver takes a 2.3L balloon from the surface, where the pressure is 1.0atm and the temperature is 37degrees C, to a depth
1. 2 answers
2. asked by Jessica
3. 2,021 views
which of thh following reactants would you add to an aqueous solution of ammonium sulfate in order to precipitate quantitatively
1. 3 answers
2. asked by Rosebud
3. 1,846 views
1)Convert 1/20 of a circle to both degrees and radians.All I have is 9/180 is what I come up with. 2) what fraction of a circle
1. 2 answers
2. asked by ALISON
3. 1,735 views
3. An industry currently has 100 firms, all of which have fixed costs of $16 and average variable cost as follows:Quantity
1. 0 answers
2. asked by andy
3. 1,653 views
The thermal capacity of 10g of a substance is 8 calories. the specific heat is in J/kg-Koptions : 1.3360 2.3630
1. 2 answers
2. asked by kala
3. 1,602 views
one side of an equilateral triangle is 42cm.find the length of an altitude of the triangle.
1. 2 answers
2. asked by lisa
3. 1,587 views
T/F QuestionsThe main reason that the bank statement cash balance and the company's cash balance do not initially balance is due
1. 1 answer
2. asked by Natalie
3. 1,550 views
How fast must the ball rolled along the surface of a 70cm high table so that when it roll off the edge it will strike the floor
1. 2 answers
2. asked by Abbey
3. 1,420 views
assume equal masses of the following substances, all of them at 20.0 degrees C and exposed to the same source of heat
1. 3 answers
2. asked by RoseBud
3. 1,401 views
An exam consists of two parts, Section X and Section Y. There can be a maximum of 80 questions. There must be at least 20 more
1. 2 answers
2. asked by john
3. 1,383 views
a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 175 and a standard
1. 1 answer
2. asked by charmaine
3. 1,332 views
The circular path of cars on a ferris wheel can be modeled with the equation x^2-14x+y^2-150y=-49, measured in feet. What is the
1. 1 answer
2. asked by Dena
3. 1,326 views
what will be the final temperature of a system in which 150.0g of water at 5.0 degrees C are added to 1.00L of water at 90.5
1. 7 answers
2. asked by RoseBud
3. 1,314 views
1. Since they’re partners in communication, an illustration shouldA. appear in a darker shade or color than text. B. appear in
1. 2 answers
2. asked by Caralynn93
3. 1,305 views
Consider the following reaction:H2(g) + I2(s) ---> 2HI(g) TriangleH = 51.9 kj (enthalpy) Calculate the standard enthalpies of
1. 1 answer
2. asked by Sandy
3. 1,304 views
consider the reaction between copper metal and chlorine gas producing solid copper(1) chloride. when 16.2g of copper is reacted
1. 2 answers
2. asked by janice
3. 1,286 views
A 1.4-m-long massless rod is pivoted at one end and swings around in a circle on a frictionless table. A block with a hole
1. 1 answer
2. asked by Anonymous
3. 1,252 views
An experiment shows that a 111ml gas sample has a mass of 0.161g at a pressure of 725mmHG and a temperature of 36degrees C.What
1. 1 answer
2. asked by Jess
3. 1,222 views
A gas sample with a volume of 5.3L has a pressure of 745mmHg at 33degrees C.What is the pressure of the sample if the volume
1. 1 answer
2. asked by houston
3. 1,217 views
What is the molar solubility of barium phosphate in a 0.282M barium acetate solution?If I set up and ice table I would have
1. 1 answer
2. asked by Hannah
3. 1,205 views
A shuttle bus for a festival stops at the parking lot every 18 minutes and stays at the lot for 2 minutes. If you go to the
1. 1 answer
2. asked by Anonymous
3. 1,203 views
If a projectile is launched from Earth with a speed equal to the escape speed, how high above the Earth's surface is it when its
1. 1 answer
2. asked by Kristin
3. 1,191 views
1. Benzene is often produced as a side product during Grignard reactions where phenylmagnesium bromide is used as the Grignard
1. 0 answers
2. asked by genius
3. 1,191 views
Graph the equation. Identify the vertices, co-vertices, and foci of the ellipse.64x^2+16y^2=1024 This is what i have so far
1. 2 answers
2. asked by sam
3. 1,185 views
1. What is the base and the height of the rectangle if the area is 216 and the perimeter is 66?2.The perimeter of an isosceles
1. 2 answers
2. asked by Anonymous
3. 1,179 views
In a 0.05M solution of a weak monoprotic acid,[H+]=.0018.What is its Ka?
1. 1 answer
2. asked by Danny
3. 1,166 views
1. A good indicator will have a(n)____ close to this volume and pH.I think it's endpoint but it's wrong. 2. (part a) What is the
1. 8 answers
2. asked by Jody
3. 1,139 views
i will be greatful to you if you help in solving the below problems:1.)Prove that log15=log5+log3 2.)Show that
1. 2 answers
2. asked by srikar
3. 1,138 views
based on the following chemical equationHCN+O2 yields N2+CO2+H20 identify the limiting reactants and the mass of N2 produced
1. 2 answers
2. asked by RoseBud
3. 1,101 views
find the length of a side of a square whose diagonal is 36 in.
1. 1 answer
2. asked by lisa
3. 1,088 views
In the glass atrium at the entrance to the city aquarium, a designer wants to suspend a 2400-N sculpture of a dolphin. It will
1. 0 answers
2. asked by justin
3. 1,087 views
In a certain city the temperature (in degrees Fahrenheit) t hours after 9 a.m. was approximated by the functionT(t) = 50 +
1. 1 answer
2. asked by Elizabeth
3. 1,067 views
The perimeter of a square is 64 ft. Find the length of a diagonal. Please show me all the steps.
1. 4 answers
2. asked by lisa
3. 1,046 views
XYZ Corporation employs 40,00 people with their own associated IP addresses, and operates over 400 servers, including e-mail
1. 0 answers
2. asked by Ginger
3. 1,042 views
A 6.0g pellet of lead at 32 degrees c gains 36.8 J of heat. What will be its final temperature
1. 1 answer
2. asked by Melissa
3. 1,032 views
y varies directly as the cube of x and inversely as the square of z.If y is 30 when x is 2 and z is 4: b) Find the equation that
1. 1 answer
2. asked by Angie
3. 1,016 views
find the length of a side of a square whose diagonal is 16 in.
1. 1 answer
2. asked by lisa
3. 993 views
Managerial accounting is
1. 1 answer
2. asked by BOB
3. 980 views
Identify one environmental or human factor that causes ill health,accidents,crises,and disasters within your community or any
1. 9 answers
2. asked by Dikeledi
3. 974 views
Several volcanoes have been observed erupting on the surface of one of Jupiter's closest moons. Suppose that material ejected
1. 2 answers
2. asked by Jane
3. 936 views
Causation in toxic tort cases is discussed in terms of:a) General and specific causation. b) Sharing expenses and risk. c)
1. 0 answers
2. asked by michelle
3. 901 views
How many amperes would be needed to produce 60 g of magnesium during the electrolysis of molten MgCl2 in 2 hours?
1. 2 answers
2. asked by Anonymous
3. 896 views
If the length of the sides of two similar triangles are in the ratio 3:4, what is the ratio of the lengths of a pair of
1. 2 answers
2. asked by CJ
3. 872 views
two ropes are tied to a large boulder. one rope is pulled with a force of 400N due east. The other rope is pulled with a force
1. 1 answer
2. asked by Melissa
3. 865 views
recent 10K run the finisher are norm dist with a mean of 55 min and stand dev of 13A) determine the percentage of finishers with
1. 1 answer
2. asked by RACHELLE
3. 864 views
I have a project for my Family and Consumer Science class.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~` Directions -
1. 4 answers
2. asked by Laruen
3. 845 views
what mass of water at 10.0 degrees C is needed to cool 500.0ml of tea from 25.0 degrees C to 18.3 degrees C? Density and
1. 3 answers
2. asked by RoseBud
3. 827 views
A childs ability to jumpfor distance is an example ofAgility or Flexability
1. 4 answers
2. asked by jane
3. 808 views
Calculate the de Broglie wavelength of a proton moving at 5.50x10^5 m/s.
1. 1 answer
2. asked by mono
3. 801 views
NEW DIAGRAM:On a unit circle, sin x = square root 3 over 2, with center O. Vertical line from top to center of circle is PO.
1. 3 answers
2. asked by Anonymous
3. 783 views
Graph the equation. Identify the vertices, foci, and asymptotes of the hyperbola.Y^2/16-x^2/36=1 I think....vertices
1. 0 answers
2. asked by sam
3. 781 views
Question: Trying to find cos π/12, if cos π/6 = square root 3 over 2, how to find cos π/12 using DOUBLE angle formula?This is
1. 1 answer
2. asked by Anonymous
3. 778 views
Completa la oracion usando las palabras este,ese,aquella oaquellos.)(Hint:Complete the sentence using este, ese,aquella,o
1. 2 answers
2. asked by JOSEPH
3. 777 views
The densities of two substances are in the ratio 5:6 and the specific heats are in the ratio 3:5 respectively. The ratio of
1. 2 answers
2. asked by kala
3. 772 views
On a unit circle, sin x = square root 3 over 2, with center O.Vertical line from top to center of circle is PO. Horizontal line
1. 0 answers
2. asked by Anonymous
3. 771 views
Tara is researching the stork population living in a bird reserve. On her first day, she captures and tags 37 birds. Two weeks
1. 3 answers
2. asked by Eric
3. 770 views
-a^3+10a^2-31a+30=0
1. 1 answer
2. asked by loca
3. 755 views
Solve the trig equation exactly in the interval 0≤x≤2π.tan x + tan π/3 ------------------ = square root 3 1 - tan x tan
1. 1 answer
2. asked by Anonymous
3. 753 views
Before colonialism, most colonized people lived in: (Points : 1)general peace and tranquility static and unchanging cultures a
1. 1 answer
2. asked by Orlando
3. 748 views
4. A carpenter wants to be sure that the corner of a building is square and measures 6.0 ft and 8.0 ft alongthe sides. How long
1. 3 answers
2. asked by LOVE
3. 742 views
1. Which angle measure is consistent with all of the following criteria?(i) The reference angle is 40°. (ii) The angle is more
1. 2 answers
2. asked by LOVE
3. 728 views
Identify and describe one environmental problem that causes ill health
1. 2 answers
2. asked by Lucia
3. 715 views
Write the next term of sequence,and then write the rule for the nth term.1)1,8,27,64,....125 the nth is n 2) 3,8,15, 24,.....35
1. 1 answer
2. asked by JOSEPH
3. 713 views
How many moles of gas must be forced into a 3.7L ball to give it a gauge pressure of 8.4psi at 23degrees C? The gauge pressure
1. 1 answer
2. asked by Jessica12
3. 711 views
The length of a triangle is twice the width. The area is 2yd^2.Please, find length and width and simplify. :-)
1. 5 answers
2. asked by ShelbyA
3. 699 views
I am very confused about how to start this problem:A 29.8 mL sample of 0.354 M methylamine, CH3NH2, is titrated with 0.231 M
1. 1 answer
2. asked by Dan
3. 698 views
Ms. sue for the persasive essay on glass castle, you tell me to give examples in essay to prove thesis which be that her father
1. 8 answers
2. asked by Mohammad
3. 691 views
a circular wire loop of radius 5cm lies in the xy-plane in a magnetic field defined by B=-(4t^2+3t).determine the voltage across
1. 1 answer
2. asked by musa
3. 685 views
Thank you Ms.Sue for answering my last question. I have one another question that I has hard time understanding...."the
1. 2 answers
2. asked by Delhi
3. 655 views
I want to make a rectangular garden by fencing in a area on the back of my house. Three sides of the rectangle will be fencing;
1. 2 answers
2. asked by Kendra
3. 654 views
1)when a certain polynomial is divided by x - 3, the quotient is x^2+2x-5 and the remainder is -3. what is the polynomial2) Find
1. 0 answers
2. asked by sarah
3. 653 views
The three angles of a triangle have measures 12x degree, 3x degree, and 7y degree, where 7y>60. If x and y are integers, what is
1. 1 answer
2. asked by Anonymous
3. 651 views
the heat of fusion water is 335J/g,the heat of vaporization of water is 2.26kJ/g, the specific heat of water is 4.184J/deg/g.
1. 1 answer
2. asked by Randy
3. 647 views
5 ways in which the environmental or human factor that causes ill health,accidents,crises,and disasters within the communities
1. 5 answers
2. asked by Foster mathebula
3. 635 views
A perfectly cylindrical container standing upright with a top and bottom(an oil drum or coke can for example) of area A has an
1. 0 answers
2. asked by Stephen
3. 623 views
How many moles of gas must be forced into a 3.1L ball to give it a gauge pressure of 9.8psi at 22degrees C? The gauge pressure
1. 1 answer
2. asked by Jess
3. 616 views
When did the Pilgrims arrive at Plymouth Rock?
1. 1 answer
2. asked by Rezu
3. 608 views
How many grams of hydrogen are collected in a reaction where 1.80L of hydrogen gas is collected over water at a temperature of
1. 1 answer
2. asked by Jessica
3. 602 views
delta Go = -431.16kJ/mol - (298k X 0.12529 kJ/K*mol)I am having trouble converting the units for delta H and delta s to match. I
1. 1 answer
2. asked by Hannah
3. 600 views
A child throws a ball with speed and accuracy when he throws a ball to his teacher but his throws are slower and less accurate
1. 4 answers
2. asked by jane
3. 590 views
solve for x 4(2x-1)= 2x+35
1. 1 answer
2. asked by joan
3. 586 views
Hi,A fountain in a shopping centre has a single jet of water. The height of the jet of water varies according to a sinusoidal
1. 1 answer
2. asked by Anonymous
3. 578 views
I can't seem to get this problem, i really don't understand itChemical reactions can also be coupled. The decreasing free energy
1. 0 answers
2. asked by bobby
3. 572 views

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