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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. 7,798 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. 5,153 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. 4,005 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. 3,361 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. 3,263 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. 3,055 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. 2,994 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. 2,801 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. 2,428 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. 2,410 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. 2,396 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. 2,245 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. 2,228 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. 1,987 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. 1,977 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. 1,933 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. 1,810 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. 1,706 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. 1,670 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. 1,646 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. 1,646 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. 1,628 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. 1,504 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. 1,500 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. 1,444 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. 1,435 views
Please help!!!!!! cosx-sin^2x-1
1. 10 answers
2. asked by Phoebe
3. 1,431 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. 1,374 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. 1,307 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. 1,302 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. 1,295 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. 1,258 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. 1,221 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. 1,203 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. 1,197 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. 1,191 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. 1,178 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. 1,174 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. 1,153 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. 1,147 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. 1,137 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. 1,131 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. 1,122 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. 1,121 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. 1,120 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. 1,120 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. 1,107 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. 1,105 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. 1,102 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. 1,085 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. 1,073 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. 1,070 views
Simplify Complex fraction:(x-1) ----- (x-3) --------- 1 4 ---- - ---- x2-x-6 (x+2)
1. 1 answer
2. asked by Ana
3. 1,067 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. 1,066 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. 1,058 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. 1,045 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. 1,033 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. 1,013 views
Provecotx-1/cotx+1=1-sin2x/cos2x
1. 2 answers
2. asked by monic
3. 1,010 views
do all double-reed and single-reed instruments belong to the woodwind family?
1. 1 answer
2. asked by Anonymous
3. 996 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. 989 views
Find the real solutions of the equation by graphing. 6x^3-2x=-9x^2
1. 2 answers
2. asked by Anonymous
3. 988 views
Some critics of corporate social responsibility view spending money on CSR as:
1. 1 answer
2. asked by Anonymous
3. 952 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. 951 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. 951 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. 950 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. 945 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. 937 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. 924 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. 919 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. 909 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. 861 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. 861 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. 855 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. 843 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. 834 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. 824 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. 819 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. 819 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. 802 views
What can be said of points with equal ordinates? with equal abscissa?
1. 1 answer
2. asked by angelic
3. 801 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. 799 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. 794 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. 793 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. 789 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. 773 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. 770 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. 745 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. 745 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. 743 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. 723 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. 719 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. 716 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. 708 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. 695 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. 694 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. 693 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. 691 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. 689 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. 679 views

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