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Questions Asked on March 9, 2012

For the reaction described by the chemical equation:3C2H2(g) -> C6H6(l) .. Delta H rxn = -633.1 kJ/mol a) Calculate the value of
1. 5 answers
2. asked by Katherine
3. 14,468 views
Under standard conditions (298 K and 1 atm), which statement is true?a] diamond converts to graphite spontaneously b] graphite
1. 4 answers
2. asked by Katherine
3. 12,933 views
Using the following data calculate Delta Sfus and Delta Svap for K in J/mol-kTm(K) = 336, Delta H Fus(kJ/mol) = 2.33, Tb (K) =
1. 2 answers
2. asked by Katherine
3. 11,320 views
Which of the following reactions are spontaneous (favorable)?A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol .. B] NH3(g) +
1. 6 answers
2. asked by Kat
3. 10,211 views
1. In persuasive writing, it is important to (1 point)anticipate and address counterarguments.clearly state your position.
1. 27 answers
2. asked by jason
3. 8,239 views
sheila spent one-sixth of her money in one store. in the next store, she spent three times as she spent in first store, and had
1. 2 answers
2. asked by rhea
3. 7,388 views
1. List at least three things that your body strives to keep constant. Think about what aspects of your body overall, of one
1. 7 answers
2. asked by princess
3. 5,751 views
The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling
1. 6 answers
2. asked by HELP PLEASE
3. 5,130 views
20.) A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk
1. 2 answers
2. asked by Anonymous
3. 4,971 views
At a low point in its swing, a pendulum bob with a mass of 0.2kg has a velocity of 4m/s. Ignoring air resistance, how high will
1. 1 answer
2. asked by Mary
3. 4,480 views
An invoice is dated January 24 with terms 2/10 – 20x. Find the final discount date and the net payment date. The net payment
1. 1 answer
2. asked by Anonymous
3. 4,172 views
Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnSa) How many grams of ZnS will be formed? b) How
1. 4 answers
2. asked by Annie
3. 3,370 views
1. Let R be the region in the first quadrant enclosed by the graphs of y=4-X , y=3x , and the y-axis.a. Find the area of region
1. 1 answer
2. asked by Taeyeon
3. 3,289 views
a sports car traveling at 27.8 m/s slows at a constant rate to a stop in 8.00 s. What is the displacement of the sports car in
1. 3 answers
2. asked by red
3. 3,104 views
A base has a Kb of 2.5 x 10–11. Which of the following statements is true?This is a concentrated base. This base ionizes
1. 1 answer
2. asked by Rachel
3. 3,012 views
Starting from rest at the top, a child slides down the water slide at a swimming pool and enters the water at a final speed of
1. 2 answers
2. asked by cody
3. 3,009 views
Energy is needed to transport a substance from outside a living cell to inside the cell. This energy is measured in kilo
1. 3 answers
2. asked by Steph
3. 2,442 views
2. Let R be the region of the first quadrant bounded by the x-axis and the cuve y=2X-X^2a. Find the volume produced when R is
1. 1 answer
2. asked by Taeyeon
3. 2,411 views
A score that is 6 points below the mean corresponds to a z-score of z= - .50, what is the population standard deviation?
1. 1 answer
2. asked by Amy
3. 2,364 views
At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of
1. 1 answer
2. asked by mike
3. 2,234 views
Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance =
1. 3 answers
2. asked by Kristie
3. 2,116 views
Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide.NH4I(s) <==> NH3(g) + HI(g) At 400°C, Kp = 0.215.
1. 1 answer
2. asked by Sarah
3. 2,092 views
A reduced fat cookie contains 12g of fat per serving. In order for food to be termed reduced fat it must have at least 20% less
1. 1 answer
2. asked by Sharon
3. 1,976 views
A hot-air balloon is rising upward with a constant speed of 2.50 m/s. When the balloon is 3.00 m above the ground, the
1. 1 answer
2. asked by rachel
3. 1,927 views
2NaOH+2Al+2H2O --> 2NaAlO2+3H2here is the reaction. If i am trying to find the mass of hydrogen produced and i am trying to
1. 1 answer
2. asked by Erica
3. 1,926 views
AgNO3+FeCl3 --> AgCl+Fe(NO3)3In an experiment, it was planned to mix a solution containing 25 g of AgNO3 with another solution
1. 1 answer
2. asked by Jamie
3. 1,850 views
When MoO3 and Zn are heated together they react3Zn(s)+2MoO3(s) --> Mo2O3(s)+3ZnO(s) What mass of ZnO is formed when 20.0 grams
1. 4 answers
2. asked by Sarah
3. 1,834 views
Delta H is 20.1 kJ/mol and Delta S is 45.9 J/(mol-k). Assuming these values change very little with temperature, over what
1. 2 answers
2. asked by Katherine
3. 1,787 views
Equilibrium Equation with Partial Pressures PCl3(g) +Cl2(g) <-> PCl5(g)?An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g)
1. 8 answers
2. asked by Kylie
3. 1,780 views
A 75.0 g bullet is fired at a muzzle velocity of 476 m/s from a gun with a mass 4.75 kg and a barrel length of 60 cmHow long is
1. 2 answers
2. asked by Anonymous
3. 1,779 views
The standard molar heat of vaporization for water is 40.79 kJ/mol. How much energywould be required to vaporize 4.00 mol of
1. 2 answers
2. asked by urgent
3. 1,777 views
Where is Beyonce from?There is an apostrophe on the last letter 'e' in "beyonce.' in a text book? Whay is that?
1. 2 answers
2. asked by rfvv
3. 1,771 views
Jan, Mya, and Sara ran a total of 64 miles last week. Jan and Mya ran the same number of miles. Sara ran 8 less miles than Mya.
1. 6 answers
2. asked by dw
3. 1,666 views
Write a sine equation for period= pie, amplitude=1/2, vertical shift up 1 and phase shift left pie/4. How would the equation be
1. 4 answers
2. asked by Nicole
3. 1,634 views
A certain p-channel JFET has a VGS(off) = +6V. What is ID when VGS = +8V?
1. 2 answers
2. asked by Ed
3. 1,633 views
3.0 moles each of carbon monoxide, hydrogen, and carbon are placed in a 2.0 liter vessel and allowed to come to equilibrium
1. 4 answers
2. asked by Kelly Hills
3. 1,616 views
On a map with a scale of 1:50,000, a measured distance of 7.5 centimeters represents an actual distance of :_____ kilometersDo I
1. 2 answers
2. asked by Jazmyne
3. 1,564 views
MAIN IDEA AND DETAILSTHE MAIN IDEA IS THE MOST IMPORTANT IDEA IN A SELECTION OR A PARAGRAPH. DETAILS ARE THE SMALL PIECES OF
1. 3 answers
2. asked by dw
3. 1,528 views
A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should
1. 13 answers
2. asked by princess
3. 1,510 views
a section of a stained-glass window is shaped like a parallelogram.Its base is 6.5 inches,and its height is 4 inches.How much
1. 2 answers
2. asked by Daniela
3. 1,473 views
Before a trip from New York to Boston, the pressure in an automobile tire is 2.5 atm at 272 K. At the end of the trip, the
1. 5 answers
2. asked by please help
3. 1,461 views
Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23kg) when Mars is at
1. 3 answers
2. asked by Kristie
3. 1,440 views
A JFET has a specified pinch-off voltage of -5V. When VGS = 0, what is VDS at the point where ID becomes constant?
1. 2 answers
2. asked by Josie
3. 1,434 views
Estimate the volume of the solid that lies below the surface z = xy and above the following rectangle.R = (x, y)|8 ≤ x ≤ 14,
1. 1 answer
2. asked by john
3. 1,425 views
Find a power series, centered @ x=0, for function f(x)=x/(1+2x).I know this is a maclaurin series, but my work doesn't get the
1. 1 answer
2. asked by W
3. 1,415 views
Light of wavelength 550 nm in vacuum passes through a piece of crown glass of refractive index of 1.52. Find the velocity and
1. 1 answer
2. asked by Akash
3. 1,377 views
If CSC X = 4 in the quadrant 1, what is COS X?
1. 3 answers
2. asked by April
3. 1,328 views
Received answer to the following question from Jishka. (2469)Would you please explain the steps you used to get the answer 2469.
1. 1 answer
2. asked by Urgent Help Please
3. 1,279 views
how might the overall atmosphere of the 1920's have contributed to the failure of prohibition?
1. 2 answers
2. asked by esmeralda
3. 1,248 views
At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of
1. 0 answers
2. asked by mike
3. 1,240 views
If 2.68 grams of Copper was recovered and you started with 8.94 grams of Copper(II)chloride,then what is the percent yield of
1. 3 answers
2. asked by linda
3. 1,219 views
Write the Gross and Net Ionic Equations for the following Reactions:LiNO3(aq)+(NH4)3N(aq) => Li3N(s)+ NH4NO3(aq) Al(s)+CuCl2(aq)
1. 5 answers
2. asked by James
3. 1,215 views
A sealed cylinder of gas contains nitrogen gas at 1.00 10e3 kPa pressure and a temperature of 25°C. The cylinder is left in the
1. 1 answer
2. asked by Dontae
3. 1,183 views
I urgently need you to check this message I need to include in an email.Thank you, Writeacher. 1) Our students have started
1. 1 answer
2. asked by Henry
3. 1,183 views
If you slosh the water in a bathtub at the correct frequency, the water rises first at one end and then at the other. Suppose
1. 1 answer
2. asked by Anonymous
3. 1,165 views
A conical scoop is used to remove coffee from the can an place it into a coffee maker. the scoop has a 1 inch diameter and a 2
1. 1 answer
2. asked by starlight18
3. 1,163 views
Need to make a problem, using parentheses and use as many operations to write an expression equal to to th target number. You
1. 1 answer
2. asked by Sam
3. 1,157 views
The ramp on the back of a mvoing van is 3 feet high and rises at an angle of 25 degrees. How high is the ramp? Round to the
1. 2 answers
2. asked by hope
3. 1,140 views
What is the maximum speed (in meters/second) with which a 1300 kg car can round a turn of radius 700 m on a flat road, if the
1. 1 answer
2. asked by cole
3. 1,122 views
In the eleventh and twelfth centuries, the Song Dynasty had all of the following characteristics exceptA. equal status for men
1. 2 answers
2. asked by Anonymous
3. 1,107 views
enrollment at a college has 8500 students enrolled, there aer 1/3students over 25 as there are under 25. how mant are over 25
1. 1 answer
2. asked by Anonymous
3. 1,091 views
A 9 V battery is connected in series with a 100 Ω resistor and 12µF capacitor. The capacitor is initially uncharged. What is
1. 1 answer
2. asked by Anonymous
3. 1,078 views
what is rule for a function table that has input/output12/0 20/2 32/5 52/10
1. 1 answer
2. asked by pat
3. 1,074 views
Two carts, A and B, are connected by a rope 39 ft long that passes over a pulley P (see the figure). The point Q is on the floor
1. 1 answer
2. asked by Nurcan
3. 1,071 views
How many grams of ethanol must be added to 500.0 g of water to make a solution that freezes at 0.00 degrees fahrenheit? The
1. 1 answer
2. asked by Renee
3. 1,048 views
the area of a square is 49 square inches. find the number of inches in the length of a diaganol. express your answer in simplest
1. 2 answers
2. asked by pedro
3. 1,019 views
A solution of NaOH with pH 13.68 requires 35.00 mL of 0.128 M HClO_4_ to reach the equivalence point. What is the volume of the
1. 3 answers
2. asked by Savannah
3. 1,016 views
what is the chemical equation of copper II oxide and carbon monoxide (include phases)?
1. 1 answer
2. asked by Steven
3. 1,013 views
i asking question for my sister againhow r gene combina tions reshufled? my sister and i find this paragraph online but we not
1. 3 answers
2. asked by Mohammad
3. 1,007 views
The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling
1. 1 answer
2. asked by HELP PLEASE
3. 980 views
Which of the following is the maximum value of the function f(x)=2sinxcosx?a) 0 b) 1 c) 2 d) No maximum value
1. 1 answer
2. asked by Melinda
3. 967 views
I'm doing a poster in science and its about radon. Radon is a radioactive gas and it causes lung cancer, but i don't know what
1. 27 answers
2. asked by Portia
3. 965 views
Find the y-intercept of y = 4x - 64.
1. 1 answer
2. asked by Anonymous
3. 958 views
please proof read my short story please and make some correctionLove-Hate story “Happy birthday Khushi”, her family said as
1. 2 answers
2. asked by annie
3. 958 views
Homework Help: Catering(Gourmet Essentials)1. In the dining room brigade system, the positions of maitre d’hôtel and/or
1. 1 answer
2. asked by shanon
3. 953 views
Is it even possible to guess the signs of Delta H, S, and G from only knowing the following information?:- Silica gel is a
1. 2 answers
2. asked by Katherine
3. 951 views
How long did it take the trip if Jay drove 340 kilometers at the average rate of 68 kilometers per hour?
1. 2 answers
2. asked by Antonio
3. 945 views
You are in a space shuttle traveling in the circular orbit, which is 380 km above the Earth. Your friend is in another space
1. 1 answer
2. asked by Sarah
3. 934 views
Help please!Do organic fertilizer products (in bags or sacks) decay after some time? If yes, how long will it take to decay?
1. 0 answers
2. asked by Namie
3. 918 views
A bus started out going 20 miles per hour on the highway. One hour later it drove 40 miles per hour on the freeway. How long did
1. 1 answer
2. asked by Anonymous
3. 896 views
combine like terms (simplify)11/14a-1/15b+1/14a-11/15b
1. 3 answers
2. asked by Diana
3. 896 views
In a population of exam scores,a score of X= 48 corresponds to z= 1 and a score of X= 36 corresponds to z= -.50. Find the mean
1. 1 answer
2. asked by Amy
3. 893 views
Writeacher, I need your help to develop a few ideas. Thank you very much.1) It would be really important if in the future a
1. 1 answer
2. asked by Henry
3. 883 views
how successful was Harding in fulfilling his campaign pledge pf returning the country to normalcy?
1. 2 answers
2. asked by esmeralda
3. 879 views
A solution of NaOH with pH 13.68 requires 35.00 mL of 0.128 M HClO_4_ to reach the equivalence point. How do you calculate
1. 1 answer
2. asked by Savannah
3. 863 views
true or falsea small plastic ball has an excess negative charge on it. if a magnet is placed close to this ball, it will either
1. 1 answer
2. asked by fatih
3. 854 views
A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the vertical velocity
1. 1 answer
2. asked by Anonymous
3. 844 views
Which type of graph is best suited for displaying the number of hours spent studying by students in different age ranges?
1. 3 answers
2. asked by kelvin
3. 838 views
Write a MAIN function and a FUNCTION to compute the sum of the below series.((-1)^(n+1)*n!)/(n*n) (from n=1 to infinity) Within
1. 14 answers
2. asked by maria PLEASE HELP
3. 829 views
Transform the equation by completing the square:y^2 + 2x - 6y - 7 = 0
1. 1 answer
2. asked by Joe
3. 818 views
What distinction does the mayor-council system of city government hold?. . where can I found this?? Thanks
1. 1 answer
2. asked by kelr
3. 794 views
i'm having a hard time paraphrasing this passage in MLA style and also using it as a direct quote in APA please help!!The United
1. 1 answer
2. asked by salma
3. 791 views
which region of the southern grasslands possesses rich deposits of oil and bauxite?
1. 5 answers
2. asked by brittany
3. 785 views
a weightlifter lifts a set of weights a vertical distance of 2.36. if a constant net force of 335 N is exerted on the weights
1. 1 answer
2. asked by Nikki
3. 785 views
i asked another question in my post below pleaseeeeeeeee answer it.. THANX!!!!!!!
1. 1 answer
2. asked by HELP PLEASE
3. 776 views
which type diapers meet the American Health Association's standards?
1. 2 answers
2. asked by princess pum-punt
3. 775 views
Writeacher, I really need your help to check some mistakes in the word choice:1) He lives alone because his wedding is broken.
1. 1 answer
2. asked by Henry
3. 756 views
Find a power series, centered @ x=0, for function f(x)=x/(1+2x).I know this is a maclaurin series, but my work doesn't get the
1. 1 answer
2. asked by W
3. 756 views
a lower yield of phosphonium salt is obtained in refluxing benzene than in xylene.
1. 0 answers
2. asked by vian
3. 733 views
A person can jump a horizontal distance of2.59 m on the Earth. The acceleration of gravity is 11.8 m/s2 . How far could he jump
1. 0 answers
2. asked by Tina
3. 721 views

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