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Questions Asked on March 10, 2012

Phosphorus pentachloride decomposes according to the chemical equationPCl5(g) -----> PCl3 (g)+ Cl2(g) Kc= 1.80 at 250 degrees C
1. 9 answers
2. asked by Sarah
3. 5,083 views
An electric post was broken by a strong typhoon.It formed a right triangle with the ground.If a broken part makes an angle of 25
1. 1 answer
2. asked by NIRVANA RIZA A. GARON
3. 4,173 views
Phenacetin has the structure shown below. Write an equation for its preparation starting from 4-ethoxyaniline.
1. 1 answer
2. asked by chi
3. 3,996 views
Give two reasons why the crude product in most reactions is not pure.
1. 4 answers
2. asked by chi
3. 3,737 views
The width of a rectangle is fixed at 7 cm. Determine (in terms of an inequality)those lengths for which the area will be less
1. 2 answers
2. asked by Jeannine
3. 3,243 views
a pizza has a circumference of 47.1in. what is the radius
1. 8 answers
2. asked by daryl
3. 2,735 views
A long cylindrical insulator has a uniform charge density of 1.0 #C/m3 and a radius of9.0 cm. a) What is the electric field
1. 2 answers
2. asked by Fatima
3. 2,468 views
Spider silk is a remarkable elastic material. A particular strand has spring constant 70 mM/m, and it stretches 9.5 cm when a
1. 3 answers
2. asked by Eliana
3. 2,449 views
if the average number of textbooks in professors' offices is 16, the standard deviation is 5, and the average age of the
1. 3 answers
2. asked by linda
3. 2,087 views
Why do the rate of reaction for a reversible reaction slows down at equilibrium stage.
1. 2 answers
2. asked by Rose
3. 2,033 views
a positive charge is moving to the right and experiences a vertical upward magnetic force. In which direction is the magnetic
1. 1 answer
2. asked by fatih
3. 2,030 views
A galvanic cell is based on the following half-reactions:Fe2+ + 2e- --> Fe(s) E= –0.440 V 2H+ + 2e- --> H2(g) E= 0.000 V where
1. 2 answers
2. asked by Kaili
3. 2,001 views
A biologist estimates that 80% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random
1. 2 answers
2. asked by Anonymous
3. 1,932 views
what are the equivalent fractions for 9/8
1. 4 answers
2. asked by shion
3. 1,868 views
How would changes in blood flow o specific organs help someone resist dehydration? Consider how reduction of function in
1. 1 answer
2. asked by lisa
3. 1,822 views
what are the equivalent fractions for 7/20
1. 2 answers
2. asked by shion
3. 1,651 views
A town has a population of 32,000 in the year 2002; 35,200 in the year 2003; 38,720 in the year 2004; and 42,592 in the year
1. 1 answer
2. asked by Brittany
3. 1,534 views
Manually calculate the compound interest on an investment of $8500 at 6% interest, compounded semiannually, for 18 mo.
1. 1 answer
2. asked by sandra
3. 1,508 views
A 35-foot long ladder is leaning against the wall of a building.How far from the ground is the top of the ladder and how far
1. 3 answers
2. asked by nestor v. reye,Jr.
3. 1,504 views
The pulley system shown in the figure is used to lift a 52-{\rm kg} crate. Note that one chain connects the upper pulley to the
1. 1 answer
2. asked by JO
3. 1,500 views
Question 1: Kinetic Theory (7 points)a. Briefly state what the kinetic theory says. (2 points) b. Put the following molecules in
1. 1 answer
2. asked by princess
3. 1,453 views
An RLC circuit has voltage supplied to it at a frequency of 13.0 kHz with a phase difference between the current and the voltage
1. 1 answer
2. asked by fatih
3. 1,448 views
At a certain temperature, the Kp for the decomposition of H2S is 0.832H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is
1. 13 answers
2. asked by Jerry
3. 1,431 views
Two ships are leaving port at the same time. The first ship is sailing due east at 20 km/hr and the other due north at 15 km/hr.
1. 1 answer
2. asked by Candy
3. 1,423 views
An electron micrograph of a newly discovered cell shows long projections with a basal body in the cell wall. What kind of
1. 1 answer
2. asked by ’MICROBIOLOGY
3. 1,399 views
what is the pH and pOH of a soution with a volume of 5.4 that contains 15 grams of HCl and 25 grams of nitric acid
1. 1 answer
2. asked by Anonymous
3. 1,374 views
Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following.a)pH 7.4 b)pH 9.2 c) pH 11.5
1. 1 answer
2. asked by fernatesfsdf
3. 1,367 views
Mr. Rogers wants to fence in a rectangular garden next to a straight section of the SciotoRiver. He has 330 feet of fencing to
1. 1 answer
2. asked by Sandy
3. 1,360 views
An ion enters a mass spectrometer which has a .18 T field perpendicular to?an electric field of 1.6 kV/m and selects a velocity.
1. 1 answer
2. asked by fatih
3. 1,332 views
A 1O-m ladder rests againts the wall of a house.The foot of the ladder on the ground is 1.3 m from the wall.What angle does the
1. 2 answers
2. asked by NIRVANA RIZA A. GARON
3. 1,321 views
An apparatus consists of a 4 L flask containing nitrogen gas at 32C and 885 kPa, joined by a valve to a 8 L flask containing
1. 2 answers
2. asked by Sarah
3. 1,299 views
An apparatus consists of a 4 L flask containing nitrogen gas at 32 C and 885 kPa, joined by a valve to a 8 L flask containing
1. 2 answers
2. asked by Sarah
3. 1,290 views
A zinc-copper battery is constructed as follows at 25 degree C:Zn | Zn2+(0.15 M) || Cu2+(1.70 M) | Cu The mass of each electrode
1. 1 answer
2. asked by Puja
3. 1,247 views
1. when he roman government began to persecute Christiansunder Nero, a) Christianity almost disappeared b) Christians had to
1. 11 answers
2. asked by ☻i♥zee☻
3. 1,244 views
at 3.68100017 kHz the reactance in a circuit of a 9 uF capacitor and an inductor are equal in magnitude. what is the value of
1. 2 answers
2. asked by fatih
3. 1,233 views
2. Let R be the region in the first quadrant bounded by the graphs of (x^2/9)+(y^2/81)=1 and 3x+y=9 .a. Set up but do not
1. 0 answers
2. asked by Taeyeon
3. 1,233 views
A 35-foot long ladder is leaning against the wall of a building.How far from the ground is the top of the ladder and how far
1. 1 answer
2. asked by NIRVANA RIZA A. GARON
3. 1,231 views
Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected
1. 2 answers
2. asked by Roshelle
3. 1,230 views
3 Some bacterial toxins cause cells lining the digestive tract to secrete ions, making the contents of the tract hypertonic.
1. 0 answers
2. asked by ’MICROBIOLOGY
3. 1,194 views
1. On a measure of anxiety, the mean is 79 and the standard deviation is 12. What are the z-scores for each of the following raw
1. 1 answer
2. asked by bertha
3. 1,168 views
Wheat is poured on the ground at a rate of 12 ft^3/s. The pile forms a cone whose altitude is always three fourths of the
1. 1 answer
2. asked by Candy
3. 1,165 views
(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 9.62 m/s when going
1. 1 answer
2. asked by Ryan
3. 1,156 views
A boat being pulled toward a wharf by a rope attached to the boats deck from a point 8.0 m above the deck. If the rope is being
1. 1 answer
2. asked by Candy
3. 1,135 views
Physics Gravitation help...?hello People i need some help with my physics revision sheet. i cant seem to get my head round it.
1. 0 answers
2. asked by basher
3. 1,124 views
A mas of 100 Kg hangs from a cable secured to a steel pole and supported by another cable as shown below. Find the tension (T)
1. 0 answers
2. asked by Mary
3. 1,120 views
10. Use one of the sources available in the Almanacs and Yearbooks section to identify the approximate time of sunrise in
1. 1 answer
2. asked by Mrs. Jane
3. 1,110 views
given triangle abc, measure of angle b= 120 degrees, ab= 6 units, bc= 10 units, find the area of abc
1. 1 answer
2. asked by Anonymous
3. 1,108 views
find the point on the line y=2x-1 which is closest to the point (2,-1).I used distAnce formula and got D= (square root 5x^2 -4x
1. 1 answer
2. asked by L.Bianchessi
3. 1,065 views
I still have some more corrections I'd like you to check. Thank you. Please, I really need you help!1) Because of Eton's
1. 1 answer
2. asked by Henry
3. 1,050 views
I got a problem that states which graph represents the sequence of 1,2.5,4,5.5,7..Should the graph start at 1,1 or 0,1?
1. 1 answer
2. asked by rob
3. 1,026 views
I still have some sentences to check. Thank you very much to you all!1) He was one of the most famous foreigners participating
1. 1 answer
2. asked by Henry
3. 985 views
How many positions would be needed to represent 57^10,001 in ordinary decimal notation.Thanks!
1. 1 answer
2. asked by Sandy
3. 980 views
2. Utilizing the publication search function on EDSeek's Home page, which of the following companies publishes Pediatric
1. 1 answer
2. asked by Mrs. Jane
3. 957 views
I need your help to check these sentences, Writeacher. Thank you very much in advance.1) Winston's face is ruddy for the low
1. 1 answer
2. asked by Henry
3. 957 views
If Kc = 0.480 at 40.°C and Kc = 0.630 at 90.°C, what is ΔH° for the reaction?X<---->Y
1. 1 answer
2. asked by Andrew
3. 956 views
Archaeologists and forensic scientists use the length of of human bones to estimate the height of his/her femur f(the bone from
1. 2 answers
2. asked by kim
3. 938 views
In the reaction between p-aminophenol and acetic anhydride to form acetaminophen, what was the purpose of adding water to the
1. 0 answers
2. asked by chi
3. 931 views
Given the function�" f(x)=1/4x− 3, find a formula for the inverse function.
1. 1 answer
2. asked by Brian
3. 927 views
The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism:step
1. 0 answers
2. asked by Hannah
3. 926 views
The strength of a beam with rectangular corss-section is directly proportional to the product of the width and the square of the
1. 0 answers
2. asked by Candy
3. 925 views
1/[N2O] = 1/(1.75M) + (1.10E-3M^-1 S^-1)(1852s)[N2O] = 0.383 M I know I posted a similar question but I am having trouble with
1. 0 answers
2. asked by Hannah
3. 924 views
A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.3 N acts on it for a
1. 1 answer
2. asked by Michelle
3. 911 views
(4.35E-2 - x)(7.56E-2 -x )============================ (0.324 + 2x)2 Rearrange to get an expression of the form ax2 + bx + c = 0
1. 2 answers
2. asked by bob
3. 900 views
The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism:step
1. 0 answers
2. asked by Hannah
3. 878 views
A projectile is launched from a platform 20 feet high with an initial velocity of 72 feet per second,The height h of the
1. 0 answers
2. asked by Brian
3. 874 views
Which represents the type of sequence: 12, 22, 30, 36, 41, …?neither arithmetic nor geometric both arithmetic and geometric
1. 2 answers
2. asked by Brett
3. 871 views
20. Which of the following sets of Library of Congress call numbers isin the correct order? A. E88 G2512 S57 1998, E88 G62 D225,
1. 1 answer
2. asked by Mrs. Jane
3. 851 views
find max, min and saddle points of the give function f(x,y)=sin(x)+sin(y)+sin(x+y)0<=x<=pi/4 0<=y<=pi/4 i have that
1. 1 answer
2. asked by Help Please
3. 844 views
Find the points of inflection of the graph of the function. (If an answer does not exist, enter DNE.)f(x) = 1/3x^4 + 4x^3 for
1. 2 answers
2. asked by Angelina
3. 836 views
A can of soda at 80° F. is placed in a refrigerator that maintains a constant temperature of 36°F. The temperature T of the
1. 0 answers
2. asked by Brian
3. 798 views
The value of many things we own depreciates over time. When an asset's value decreases by a fixed amount each year, the
1. 1 answer
2. asked by kim
3. 797 views
explain how to find ans. a clock has a circumference of 166cm. what is the diameter
1. 2 answers
2. asked by daryl
3. 785 views
write an algebraic expression for y decreased by 14?
1. 2 answers
2. asked by Anonymous
3. 783 views
Write the balanced equation for the double replacement reaction of:Barium chloride and Sulfuric acid
1. 2 answers
2. asked by Kristy
3. 761 views
a magnetic field goes from the top to the bottom of this page. what direction will a proton moving diagonally from the upper
1. 1 answer
2. asked by fatih
3. 756 views
A proton moves with a velocity of vector v = (6ihat - 1jhat + khat) m/s in a region in which the magnetic field is vector B =
1. 4 answers
2. asked by Anand
3. 744 views
A closed box is to be a rectangular solid with a square base and volume of 12 ft^3. Find the most economical dimensions if the
1. 0 answers
2. asked by Candy
3. 743 views
Suppose that sin q = − 12/13 and that q is a Quadrant IV angle.(a) Find the exact value of cos q. Show work. (b) Find the
1. 0 answers
2. asked by Brian
3. 734 views
Write the balanced equations for the following examples:a) potassium hydroxide + sodium sulfide --> potassium sulfide + sodium
1. 1 answer
2. asked by Nene
3. 731 views
A mass sits at the top of a 2 meter long ramp inclined at an angle of 30 degrees (to the horizontal). When the mass is released,
1. 1 answer
2. asked by Mary
3. 730 views
an RlC circuit has a resistance of 4 kOhm, a capacitance of 33 uF, and an inductance of 23 H. if the frequency of the
1. 1 answer
2. asked by fatih
3. 728 views
Points (–1, 6) and (–3, 2) are endpoints of the diameter of a circle.(a) What is the exact length of the diameter? (Simplify
1. 0 answers
2. asked by Brian
3. 727 views
A skateboarder shoots off a ramp with a velocity of 6.7 m/s, directed at an angle of 59° above the horizontal. The end of the
1. 1 answer
2. asked by Angela
3. 717 views
Estimate the limit numerically.lim as x→(approaches to)5 6e^(x − 5) How do I solve it? I don't plug in the numbers do I?
1. 2 answers
2. asked by Nick
3. 703 views
M= 19.8 SD= 7.2What is the probability of randomly selecting a student with a treadmill time greater than 25 minutes? In
1. 2 answers
2. asked by Amy
3. 702 views
solve the system7x^2 - 5y^2 + 20y = 3 21x^2 + 5y^2 =209
1. 1 answer
2. asked by Martin
3. 696 views
How much work does a 69 kg person do against gravity in walking up a trail that gains 790 m in elevation
1. 2 answers
2. asked by Michelle
3. 696 views
Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following.a)pH 7.4 b)pH 9.2 c) pH 11.5
1. 1 answer
2. asked by JIM
3. 692 views
The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be
1. 0 answers
2. asked by pooja
3. 691 views
Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of
1. 0 answers
2. asked by Kelly
3. 690 views
what are van der waals forces
1. 3 answers
2. asked by jake
3. 684 views
Hi!I would like to know the definitions for... ELEMENT: something on the periodic table? COMPOUND: molecule with at least 2
1. 1 answer
2. asked by Cicilia
3. 678 views
The total charge in an electrical circuit as a function of time is given by q=t/(t^2+1) coulombs. Find the maximum charge of q.
1. 0 answers
2. asked by Candy
3. 664 views
y= sqrt(81-x^2)What length and width should the rectangle have so that its area is a maximum? (smaller value) (larger value)
1. 0 answers
2. asked by Angelina
3. 663 views
Please explain what is global warming?. And How Do Business Enterprises contribute towards economic growth??? And Please Name Me
1. 2 answers
2. asked by Khabo
3. 654 views
What is the underlying message of all of Arthur Jarvis’s writing? How does reading his son’s writing affect the behavior of
1. 2 answers
2. asked by john
3. 652 views
The temperature controls to two locations on Earth. Discuss how the 5 factors influencing temperature patterns effect St. Louis,
1. 0 answers
2. asked by Jazmyne
3. 652 views
A tank consists of a right circular cylinder at height (h)surmounted by a hemisphere at a radius (r) with an outlet atthe top.
1. 0 answers
2. asked by Peter
3. 648 views
13. Which of the following publications are both listed under the"Magazines" results? A. Science News and Earth Island B. The
1. 1 answer
2. asked by Mrs. Jane
3. 632 views
Which is the eighth term in the sequence an=-1/125(5^n-1)
1. 1 answer
2. asked by Beth
3. 631 views

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