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Questions Asked on December 9, 2012

Use the data given below to construct a Born - Haber cycle to determine the electron affinity of Br?DH°(kJ) K(s) → K(g) 89
1. 1 answer
2. asked by Rob
3. 7,769 views
Magnetite, an iron ore with formula Fe3O4, can be reduced by treatment with hydrogen to yield iron metal and water vapor.(a)
1. 4 answers
2. asked by Marie
3. 5,108 views
A CONVEX LENS PRODUCES O REAL AND INVERTEDIMAGE 2.5 TIMES MAGNIFIED AT A DISTANCE OF 25CM FROM THE LENS.CALCULATE THE FOCAL
1. 3 answers
2. asked by emi
3. 3,973 views
Mary and Peter had a total of Rs 480.After Peter spent Rs 20, he had 3 times as much as Mary.How much did Mary have?
1. 5 answers
2. asked by Mona
3. 3,328 views
The figure below is a heat curve for an unknown outerspace substance discovered by the Mars rover. By understanding the heat
1. 1 answer
2. asked by Anon
3. 3,226 views
Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the
1. 2 answers
2. asked by Anya
3. 3,022 views
An ice cream store sells 20 different flavors of ice cream and 3 different types of cones. How many different combinations of
1. 4 answers
2. asked by Pepa
3. 2,953 views
A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760
1. 1 answer
2. asked by Amy
3. 2,763 views
How many moles of glucose , C6H12O6, can be "burned" biologically when 10.0 mol of oxygen is available.C6H12O6(s) +
1. 2 answers
2. asked by Chan
3. 2,390 views
The (nonconservative) force propelling a 1.50E3 kg car up a mountain road does 4.70E6 j of work on the car. The car starts from
1. 0 answers
2. asked by Matoro
3. 2,378 views
Which one of the following sentences contains an abstract noun?A. She handed him the dishtowel B. His skill was legendary. C.
1. 3 answers
2. asked by Sandia
3. 2,374 views
kollo enterprise has beta 0.82 real risk freerate 2.00% investors expected 3.00% future inflation rate, market risk premium is
1. 2 answers
2. asked by lora
3. 2,219 views
A 100-foot vertical antenna is on the roof of a building. From a point on the ground, the angle of elevation to the top and the
1. 1 answer
2. asked by heather
3. 2,196 views
a. Express f(x)=x^2 - 6x + 14 in the form f(x)=(x-h)^2 + k, where h and k are to be determined.b.Hence, or otherwise, write down
1. 1 answer
2. asked by Bobby
3. 1,963 views
Iron crystallizes in a body–centered cubic structure. The volume of one Fe atom is 9.38 x 10–24 cm3, and the density of Fe
1. 2 answers
2. asked by Ian Palen
3. 1,934 views
a charge +6 C experiences a force of 2mN in +x direction.a)what was the electric field there before charge was placed ?
1. 1 answer
2. asked by lola
3. 1,891 views
Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapour pressure of 1.00 torr at 54.3oC and 10.0
1. 2 answers
2. asked by xavier
3. 1,774 views
of radius 54 meters subtended by the central angle 1/9 radian.s(arc length = meters How is the answer 6? s denotes the lenght of
1. 2 answers
2. asked by Find the length s of the arc of a circle
3. 1,660 views
At a local convenience store, you purchase a cup of coffee, but, at 98.4oC, it is too hot to drink. You add 23.0 g of ice that
1. 0 answers
2. asked by xavier
3. 1,631 views
In which of the following sentences is the underlined word a pronoun?A. "Those" are James' favorite shoes. B. "These" apples are
1. 2 answers
2. asked by Sandia
3. 1,622 views
Suppose your car gets 36 miles per gallon of gasoline, and you are driving 45 miles per hour. Using unit analysis, find the
1. 4 answers
2. asked by ben
3. 1,616 views
The figure below shows the circular wave fronts emitted by two sources. Make a table with rows labeled P, Q, and R and columns
1. 1 answer
2. asked by kev
3. 1,597 views
Find the equation of the line that passes through the pair of points. Write your answer in slope-intercept form (2,-5)(2,-1)
1. 1 answer
2. asked by Cynthia
3. 1,466 views
how to prepare 100cm3 of 1.0moldm3 copper sulphate and from this prepare 100cm3 of 0.1 moldm3 solution.similarly use the
1. 2 answers
2. asked by Anonymous
3. 1,454 views
In which of the following sentences is the underlined word an object pronoun?A. "You" really should apologize to her. B. I would
1. 3 answers
2. asked by Sandia
3. 1,420 views
Please help!!!!!! cosx-sin^2x-1
1. 10 answers
2. asked by Phoebe
3. 1,409 views
The half-life of Carbon-14 is 5730 years. What is the age of a fossil containing 1/16 the amount of Carbon-14 of living
1. 1 answer
2. asked by Melissa
3. 1,405 views
Calculate the number of moles of Al2O3 that are produced when 0.6 mol of Fe is produced in the following reaction. 2Al(s) +
1. 0 answers
2. asked by Chan
3. 1,352 views
Acton choose from two loans offersS: 12,000 at 8% simple interest for 9 months: or a 12,000 9 month discounted loan at 7%
1. 1 answer
2. asked by Queen
3. 1,279 views
a bullet of mass 8g is fired into a block of mass 260g that is initially at rest at the edge of a table of height 1m the bullet
1. 1 answer
2. asked by Anonymous
3. 1,278 views
How many moles of aluminum are needed to react completely with 1.2 mol of FeO?2Al(s) + 3FeO(s)-- 3Fe(s) + Al2O3(s)
1. 1 answer
2. asked by Chan
3. 1,268 views
A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760
1. 3 answers
2. asked by Amy
3. 1,220 views
The average pH of open ocean water is 8.1. What is the maximum value of [Fe3+] in pH 8.1 seawater if the Ksp of Fe(OH)3 is
1. 1 answer
2. asked by Brunette
3. 1,191 views
does this sound right with grammatical errors tooOdysseus sent three men to see what the land of the Lotus Eaters, who live on
1. 2 answers
2. asked by Kim
3. 1,175 views
How many moles of aluminum are needed to react completely with 1.2 mol of FeO?2Al(s) + 3FeO(s)-- 3Fe(s) + Al2O3(s)
1. 1 answer
2. asked by Chan
3. 1,172 views
What was the purpose of the Homstead Act? Did congress achieve this goal?I got what the homstead act was, but i'm confused on
1. 6 answers
2. asked by Miley
3. 1,171 views
divid the fraction 14/27 by the fraction 2/3 and reduce your answe to the lowest terms
1. 1 answer
2. asked by tim
3. 1,149 views
2. The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a standard deviation of 15
1. 0 answers
2. asked by Maurice
3. 1,149 views
Stuck :(1. Simplify (5-√-36)(2+√-1) A. 16 − 7i B. 16 + 7i C. 4 + 7i 2. Choose the point that lies on the curve r = 2 – 3
1. 1 answer
2. asked by Rodrick
3. 1,129 views
a norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a
1. 0 answers
2. asked by Anonymous
3. 1,106 views
What were Boomtowns and ghost towns? My history book dosn't describe it very well! Thanks for your help!
1. 1 answer
2. asked by Please help!!!!
3. 1,103 views
How much energy, in joules, must be absorbed to convert to Na+ all the atoms present in 1.00mg of gaseous Na? The first
1. 2 answers
2. asked by Chironjit
3. 1,101 views
These are multipal choice:According to the (Dawes Act,or Fort Laramie Treaty), Indians would receive money,domestic
1. 1 answer
2. asked by Miley
3. 1,099 views
90 degress= ? radiansHow is the answer pie over 2? 330 degrees = 11pie over 6 -105 degrees= -7pie over 12 Converting the angle
1. 1 answer
2. asked by Convert angle in degrees to radiansConvert radians
3. 1,090 views
What is the sixth term of the arithmetic sequence if the 10th term is 33 and the 15th term is 53.
1. 1 answer
2. asked by Anonymous
3. 1,089 views
Which of the following statements is true regarding sentence components?A. Often the subject will act upon the object B. The
1. 2 answers
2. asked by Sandia
3. 1,085 views
AT WHAT HEIGHT ABOVE THE EARTH'S SURFACE DOES THE ACCELERATION DUE TO GRAVITY FALL TO 1% OF ITS VALUE AT THE EARTH SURFACE
1. 1 answer
2. asked by DEEPAK
3. 1,085 views
A(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a tallbuilding. How high (in
1. 0 answers
2. asked by Anonymous
3. 1,084 views
Please help! this is my worst subject!How did land-owning companies take advantage of the Homestead Act?
1. 1 answer
2. asked by Grant
3. 1,076 views
Suppose that two current exchange rates are US $1= 117.9 Japanese yen and 1 Cuban Peso= $.0476. What is the value of 1 peso in
1. 2 answers
2. asked by ben
3. 1,064 views
if a point is equidistant from the endpoints of a segment,then the point lies on the perpendicular bisector of the segment.
1. 1 answer
2. asked by Anonymous
3. 1,051 views
Simplify Complex fraction:(x-1) ----- (x-3) --------- 1 4 ---- - ---- x2-x-6 (x+2)
1. 1 answer
2. asked by Ana
3. 1,051 views
write the standard form of the equation and the general form of the equation of the circle with radius r and center (h,k)r=10;
1. 1 answer
2. asked by Heather
3. 1,039 views
Suppose water flows from a shower at a rate of 0.38 cubic feet per minute. Do you use more water by taking a 14-minute shower or
1. 2 answers
2. asked by ben
3. 1,033 views
multiply the fraction 9/15 by the fraction 30/72 and reduce your answer to the lowest terms
1. 2 answers
2. asked by tim
3. 1,019 views
Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)^7
1. 1 answer
2. asked by Meenakshi
3. 1,018 views
How do you prepare 500mL of a 2.5M solution of NaOH from the solid compound?
1. 0 answers
2. asked by Cassie
3. 1,013 views
18 workers at a large assembly plant were asked the time it took to commute to work. The data was analyzed in Minitab and the
1. 1 answer
2. asked by Anonymous
3. 977 views
Provecotx-1/cotx+1=1-sin2x/cos2x
1. 2 answers
2. asked by monic
3. 976 views
Find the real solutions of the equation by graphing. 6x^3-2x=-9x^2
1. 2 answers
2. asked by Anonymous
3. 968 views
do all double-reed and single-reed instruments belong to the woodwind family?
1. 1 answer
2. asked by Anonymous
3. 961 views
How long could it take an ecosystem to reach climax community in a primary succession? And a secondary succession?
1. 1 answer
2. asked by Kam
3. 955 views
Some critics of corporate social responsibility view spending money on CSR as:
1. 1 answer
2. asked by Anonymous
3. 925 views
The line L has equation of 4x + 3y = 7. Find the equation of the line perpendicular to L which passes through the point of
1. 1 answer
2. asked by Angie
3. 925 views
KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in
1. 1 answer
2. asked by Ian
3. 923 views
18 workers at a large assembly plant were asked the time it took to commute to work. The data was analyzed in Minitab and the
1. 0 answers
2. asked by Maria Elizabeth
3. 911 views
1. Look at the automotive engine shown in the figure below.Auto Technician A says that the each of the camshafts in this engine
1. 0 answers
2. asked by Anonymous
3. 905 views
how many liters of ammonia are required to react with 1 mole of oxygen gas at 850 degrees centigrade and 5 atm in order to
1. 1 answer
2. asked by amanda
3. 903 views
KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in
1. 2 answers
2. asked by Ian
3. 899 views
Assuming that you breathe once in every 12 seconds, how many breaths do you take in 4 weeks? You must show the use of units.
1. 6 answers
2. asked by ben
3. 898 views
If you're compling a list of sources you used for your report in MLA style, the list is called aA. references list B.
1. 1 answer
2. asked by Sandia
3. 867 views
find the midpoint of the line segment joining the points P_1 and P_2. P_1=(-2,6); P_2=(5,0)m=(x,y) please show work
1. 1 answer
2. asked by anonymous
3. 842 views
1)A solution has a [OH-] of 5.2 x 10-4. What is the [H3O+] in the solution?2) A 0.25 M solution of a monoprotic acid, HA, has a
1. 0 answers
2. asked by nicki
3. 837 views
Which of the following is an example of an adverbial clause fragment?A.wherever there is a chance for a fabulous meal B.who
1. 4 answers
2. asked by Anon
3. 835 views
Find the equation of the tangent line to the graph of4y^2− xy − 3 = 0, at the point P=(1,1)
1. 0 answers
2. asked by Brooke
3. 820 views
A bowling ball with a radius of 12 cm is given a backspin (i.e. if you picture the ball moving to the right it is spinning
1. 1 answer
2. asked by naf
3. 803 views
Most of the eastern United States and the West Coast have a climate that is-F)mountain H)desert G)polar J)temperate My answer is
1. 1 answer
2. asked by May
3. 802 views
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
1. 0 answers
2. asked by avery
3. 797 views
a circle has the equationx^2+y^2+6x-6y-46=0 find the center and the radius of the euation. If there are any intercepts list
1. 1 answer
2. asked by Heather
3. 795 views
What can be said of points with equal ordinates? with equal abscissa?
1. 1 answer
2. asked by angelic
3. 784 views
A provincial politician would like to determine the average amount earned during summer employment by the provinces teenagers
1. 1 answer
2. asked by Anonymous
3. 775 views
According to the statistics of a famous high school in Canada, all their graduates went to either A or B for university study.
1. 0 answers
2. asked by Tom
3. 763 views
You need to put a carpet in a rectangular room that measures 13 feet by 22 feet as a cost of $19.50 per square yard. Assuming
1. 8 answers
2. asked by ben
3. 762 views
According to Freud, a boy's identification with his father is usually the result of the overwhelming power ofa) envy. b) ovarian
1. 2 answers
2. asked by allee
3. 761 views
90 degress= ? radiansHow is the answer pie over 2? 330 degrees = 11pie over 6 -105 degrees= -7pie over 12 Converting the angle
1. 1 answer
2. asked by Convert angle in degrees to radiansConvert radians
3. 754 views
the ferris wheel at a carnival has a diameter of 18 m and descends to 2m above the ground at its lowest point. Assume that a
1. 1 answer
2. asked by Miley
3. 741 views
An airplane flies with a speed of 425 mph and a heading of 63°. If the heading of the wind is 24°and the speed of the wind is
1. 1 answer
2. asked by Chris
3. 730 views
A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water
1. 0 answers
2. asked by xavier
3. 713 views
I need help with this problemA 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative
1. 3 answers
2. asked by xavier
3. 713 views
A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 2.00g of the compound produced 2.868 g CO2 and 1.567 g H2O.
1. 3 answers
2. asked by sevag
3. 706 views
Anna Cavanaugh loaned her friend Jason 1,000 for 6 months at 6% simple interest. what is the future value of the loan and how
1. 1 answer
2. asked by Queen
3. 696 views
IM STUCK ON THESE :(1. What is the equation for shifting the standard sine curve +2 units horizontally? A. y = sin (x + 2) B. y
1. 0 answers
2. asked by Rodrick
3. 694 views
find the distance d(P_1 & P_1) between points P_1 and P_2. P_1=(4,-5)and P_2=(3,4)please show work
1. 1 answer
2. asked by anonymous
3. 694 views
Ed, who suffers from dementia, has enormous difficulty getting dressed in the morning because he cannot plan and organize the
1. 1 answer
2. asked by ashley kay
3. 681 views
Which of the following would you use to sort through slides for a slide presentation?A. Camera B. Opaque Projector C. Copy
1. 1 answer
2. asked by khan
3. 675 views
Fluorine reacts with oxygen to yield oxygen difluoride.2 F2(g) + O2(g) 2 OF2(g) What is the value of K if the following
1. 1 answer
2. asked by Marie
3. 663 views
Consider the molecular level representation of a gasThere are: (a picture) 6 blue dots 5 orange dots 3 green dots (i think they
1. 0 answers
2. asked by Angela
3. 661 views
Sue was in excellent shape in high school, she could ride her 10-speed bicycle 4.8miles to her grandmother's house in 11
1. 0 answers
2. asked by Erin
3. 660 views
An elevator's cable is cut causing the elevator to slide down thhe elevator shaft on the emergency brakes and wheels. Suppose
1. 0 answers
2. asked by None
3. 659 views
Will someone please help me find a website to research the following questions?Write a 750- to 1,050-word paper discussing the
1. 1 answer
2. asked by sade c
3. 655 views

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