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Questions Asked on April 19, 2011

Calculate the lattice energy of potassium oxide from the following data:Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond
1. 2 answers
2. asked by Joanie
3. 13,851 views
A mis amigos 1.___ mucho la comida de la cafetería. A Esmeralda 2.___ las papas fritas y los refrescos. A Rodrigo 3.___ más la
1. 16 answers
2. asked by Aleesha
3. 8,125 views
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12
1. 1 answer
2. asked by cara
3. 6,885 views
A storage tank at stp contains 18.5kg of nitrogen. What is the volume of the tank and what would the pressure be if you added
1. 2 answers
2. asked by Mark
3. 6,179 views
A 10 ft. ladder is leaning against a building and makes an angle of 65 degrees with the ground. How high above the ground is the
1. 2 answers
2. asked by Randi
3. 3,933 views
what shape has 4 equal sides and 4 right angles?
1. 10 answers
2. asked by Andrew-please help!!!!!very important
3. 3,728 views
For trigonometric substitution to solve the above integral, fill in the blanks below using the picture of the triangle given.int
1. 1 answer
2. asked by Chiara
3. 3,617 views
a sample of helium gas is in a closed system with a movable piston. the volume of the gas sample is changed when both the
1. 2 answers
2. asked by Shanee
3. 3,426 views
What do the following people like? Write the correct form of the verb gustar in each sentence.1. A mí la cena que prepara
1. 2 answers
2. asked by Cierrah
3. 3,337 views
In the Sun, an ionized helium atom makes a transition from n =6 state to the n = 2 state, emitting a photon. Can that photon be
1. 1 answer
2. asked by qwer
3. 3,231 views
A grinding wheel 0.28 m in diameter rotates at 2400 rpm. What is the acceleration of a point on the edge of the grinding wheel?
1. 1 answer
2. asked by Cara
3. 3,123 views
An FM radio station broadcasts its signal at a frequency of 9.15 ×107 hertz. Determine the wavelength of the signal in air.
1. 3 answers
2. asked by ashley --
3. 2,943 views
In a rack of 15 billiard balls and one ball is selected at random what are the odds in favor it being a ball other than the 8
1. 1 answer
2. asked by Gerri
3. 2,359 views
I only get one chance for each of these questions so I was wondering if someone could check my answers, thanks!1. Consider the
1. 2 answers
2. asked by Rebekah
3. 2,323 views
2 extension ladders are leaning at the same angle against a vertical wall. The 3 meter ladder reaches 2.4 meters up the wall.
1. 2 answers
2. asked by Katie
3. 2,219 views
Need to underline the noun or pronoun and circle the word that modifies it....1. Countless pioneers crossed this vast continent.
1. 5 answers
2. asked by Ann
3. 1,956 views
A plumber charges $45 for a service call, plus $70/h for her time.a. Find the cost of a two hour service call. b. How long was a
1. 5 answers
2. asked by Jessica
3. 1,937 views
when a car suddenly stops at a red light a book lying on the car seat slides forward why does the book continue to move forward?
1. 3 answers
2. asked by Anonymous
3. 1,886 views
If a circle has a diameter of 2 3/8 inches, then what is the length of the radius
1. 2 answers
2. asked by nysanah
3. 1,859 views
How does nuclear fission create energy?Nuclear energy is produced through the splitting, or fission, of a uranium atom in the
1. 2 answers
2. asked by Anonymous
3. 1,732 views
Which of the following statements are true?Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going,
1. 3 answers
2. asked by Jamie
3. 1,685 views
Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) --> Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of
1. 0 answers
2. asked by Rebekah
3. 1,572 views
Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of
1. 1 answer
2. asked by Robbin
3. 1,536 views
What advantages does H NMR have over melting point in the determination of purity?
1. 2 answers
2. asked by anon
3. 1,418 views
Which of the following statements are true?Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going,
1. 0 answers
2. asked by Sue
3. 1,396 views
The weight of an object on the moon is one-sixth of its weight on the Earth. The ratio of the kinetic energy of a body on the
1. 2 answers
2. asked by Jazo
3. 1,389 views
Solve the linear programming problem by the method of corners.Minimize C = 5x + y subject to x + 3y ≥ 43 x + y ≥ 27 x ≥ 0,
1. 1 answer
2. asked by Leah
3. 1,383 views
Fe2O3+ 3CO=2Fe+3Co2, suppose that 1.64kg of Fe are obtained from a 2.62kg sample of Fe2O3 (ore). assuming that the reaction goes
1. 0 answers
2. asked by becky
3. 1,354 views
An ice skater spins with her arms extended and then pulls her arms in and spins faster. Which statement is correct?A. Her
1. 2 answers
2. asked by Fernando
3. 1,347 views
Much of the time and expense in drilling an oil well goes into changing the drill bit as it wears out. the drilling pipe must be
1. 0 answers
2. asked by micky
3. 1,319 views
) Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of an
1. 1 answer
2. asked by John
3. 1,307 views
What is the lewis structure for In+?I have tried everything and the answer seems wrong? Please help me
1. 1 answer
2. asked by Toni Jones
3. 1,298 views
A centrifuge accelerates uniformly from rest to 18000 rpm in 180 s. Through how many revolutions did it turn in this time?
1. 1 answer
2. asked by Cara
3. 1,294 views
Matching...Heat engine Heat pump Boiler Thermostat -a heating appliance that uses heat energy released from fossil fuels to warm
1. 3 answers
2. asked by Ashley
3. 1,232 views
A cylinder of oxygen has a gauge pressure of 2000psi and a volume of 16L at 70 degrees F. If the oxygen is used as a constant
1. 0 answers
2. asked by Lindsey
3. 1,209 views
Journal Entry of Subordinate of African Americans
1. 1 answer
2. asked by Anonymous
3. 1,202 views
An escalator in a department store is driven by a large electric motor whose power consumption changes with the load to keep the
1. 1 answer
2. asked by micky
3. 1,188 views
a vector has a magnitude of 18.3 cm and a direction of 38 degrees. find the magnitude of its vertical and horizontal components
1. 0 answers
2. asked by Brad
3. 1,178 views
How does nuclear fission create energy?Nuclear energy is produced through the splitting, or fission, of a uranium atom in the
1. 0 answers
2. asked by Anonymous
3. 1,167 views
A ray of light of frequency is 5.09 x 10^14 Hz is traveling from water to medium X. The angle of incidence in water is 45
1. 1 answer
2. asked by Allyse
3. 1,164 views
how much cobalt-60 remains 15 years after it is initially made?cobalt-60 has half life 5.27
1. 0 answers
2. asked by adib
3. 1,145 views
In a fish tank, there are two fewer blue fish than three times the number of yellow fish. If there are 10 blue fish, what is the
1. 1 answer
2. asked by Ali
3. 1,129 views
When NO(g) (0.06623 mol/L) and 422.6 grams of Cl2(g) in a 180.0 L reaction vessel at 565.0 °C are allowed to come to
1. 0 answers
2. asked by ANNA-MARIE
3. 1,129 views
Suppose that you want to take a photograph of yourself as you look at your image in a flat mirror 1.6 away.For what distance
1. 1 answer
2. asked by Lia
3. 1,127 views
(Future Value) Suppose you invest $8000 into an account that pays an annual interest rate of 6.2%. How much is in the account
1. 2 answers
2. asked by Help
3. 1,113 views
Please help with solving this5r(6rs-12st)t
1. 1 answer
2. asked by Lance
3. 1,106 views
A 2340 kg car traveling to the west at 20.7m/s slows down uniformly under a force of 8340 N to the east. a) How much force would
1. 1 answer
2. asked by Anonymous
3. 1,100 views
Deep within the earth, the process of mantle ___ drives plate tectonics.A) Condensation B) Subduction C) Currents D) Convection
1. 1 answer
2. asked by dank
3. 1,093 views
4BF3+3H2O=H3BO3+3HBF4if the reaction vessel contains 0.496 mol BF3 and 5.63g of H2O, which compound is the limiting reactant?
1. 1 answer
2. asked by dana
3. 1,092 views
a very bright source of red light has much more energy than a dim source of blue light, but the red light has no effect in
1. 1 answer
2. asked by myles
3. 1,071 views
A student of MA101 is preparing a course schedule for the next semester. The student may select one of three mathematics
1. 1 answer
2. asked by Amatusi
3. 1,066 views
the workers who have been trying to bring the nuclear crisis under control volunteered 4 the job. what factors might they have
1. 1 answer
2. asked by Anonymous
3. 1,065 views
The third longest wavelength in the Paschen series in hydrogen corresponds to what transitions?
1. 0 answers
2. asked by qwer
3. 1,064 views
The resultant of two forces acting on the same point simultaneously will be the greatest when the angle between them is180⁰
1. 2 answers
2. asked by usman
3. 1,057 views
If your credit card company charges you 1% per month on your balance, what effective annual rate of interest is it charging?
1. 0 answers
2. asked by Deron
3. 1,047 views
I posted this below, and no one answered. Please help with this very complicated question! Using 3(x-3)(x^2-6x+23)^1/2, as the
1. 0 answers
2. asked by Amy
3. 1,041 views
How many license plates consisting of 2 letters (upper case) followed by two digits are possible?
1. 0 answers
2. asked by Alaini
3. 1,038 views
I need help with two questions:1) An object can only have a charge that is an integral multiple of the charge on the ___. Am I
1. 2 answers
2. asked by Sushmitha
3. 1,037 views
You have 16 coins that are heads up and 18 coins that are tails up. After you add some coins that are tails up, the ratio of
1. 0 answers
2. asked by Natalia
3. 1,029 views
Your conclusions are faulty in a cause-and-effect essay if:A. you include secondary effects B. you include only short-term
1. 3 answers
2. asked by melissa
3. 1,027 views
The internal energy of a material is determined by..A)its temperature B)the kinetic energy of its molecules C)the potential
1. 1 answer
2. asked by Ashley
3. 1,019 views
You have 16 coins that are heads up and 18 coins that are tails up. After you add some coins that are tails up, the ratio of
1. 1 answer
2. asked by Natalia
3. 1,009 views
Solve for xlog 1000=x
1. 1 answer
2. asked by Tiffany
3. 989 views
In right triangle ABC below, what is the sine of <A?TRiangle has 7 cenimeters and 24 centimeters
1. 2 answers
2. asked by Maram
3. 987 views
convert the polar equation r^2=2cos^2theta + 3sin^2theta into a rectangular equation
1. 1 answer
2. asked by casey
3. 968 views
What is the theoretical yield of aspirin if you have 2g of salicylic acid and 5 ml acetic anhydride?
1. 1 answer
2. asked by N/A
3. 956 views
If Fx = Fy then the angle è which the vector F makes with the horizontal is of0⁰ 45⁰ 90⁰ 180⁰
1. 1 answer
2. asked by usman
3. 953 views
In triangle ABC ,if <A and <B are acute angles, and sin A=10/13 what is the value of cos A
1. 0 answers
2. asked by Maram
3. 944 views
Four candidates are running for president of the student council. three other candidates are running for vice-president. how
1. 1 answer
2. asked by Mai
3. 942 views
solve for x: 8^x=(1/64)^(x-4)
1. 1 answer
2. asked by Anonymous
3. 938 views
From the top of a lighthouse 210 feet high, the angle of depression to a boat is 27. Find the distance from the boat to the food
1. 1 answer
2. asked by Maram
3. 932 views
a 2 kg object is released from rest from a height of 10 m above the ground.calculate the kinetic energy at the moment it reaches
1. 0 answers
2. asked by zafirah
3. 931 views
ASSUME THE FORMULA OF GASOLINE AS C8H18 AND ITS DENSITY IS 0.71g/ml. IF A CAR GETS 26.2mi/gal (1GAL=3.785L), WHAT IS THE MASSOF
1. 0 answers
2. asked by dana
3. 904 views
To what extent and in what ways did the great depression and the new deal alter americans perception of the legitimate role of
1. 3 answers
2. asked by Trevor
3. 894 views
the area of trianlge ABC is 20 square units. if abgle A=130 and b=6 find the value of c?
1. 1 answer
2. asked by shannon
3. 891 views
how did the Nazi-soviet non-agression pact lead to the war in europe and asia?
1. 2 answers
2. asked by Brittna
3. 888 views
The bolts on the cylinder head of an engine require tightening to a torque of 63 . If the six-sided bolt head is 15 in diameter,
1. 0 answers
2. asked by cara
3. 879 views
Could I know the features of Command Economies/good and bad?I think I found their relative advantages and disadvantages. Down
1. 6 answers
2. asked by Anonymous
3. 877 views
Hello, I am confused on my assignment I have to do. It states to make a list on perspectives of caregivers. Can you explain this
1. 1 answer
2. asked by Nikol
3. 862 views
Sean's mom was 27 years old when he was born. When Sean is 14 years old his mother's age will contain the same two digits as
1. 3 answers
2. asked by Tom
3. 846 views
An airplane flies 200 km due west from city A to city B and then 245 km in the direction of 31.5° north of west from city B to
1. 0 answers
2. asked by diamond
3. 845 views
If a and b are any real numbers such that 0<a<1<b, which of the following must be true ov the value ab??
1. 1 answer
2. asked by Maram
3. 842 views
A dish of hot food has an emissivity of 0.42 and emits 15 W of thermal radiation. If you wrap it in aluminum foil, which has an
1. 0 answers
2. asked by Olga
3. 841 views
describe the procedure you would follow and the information you would need to know to find the mass of a reactant in a chemical
1. 1 answer
2. asked by staci
3. 837 views
A 1.00-L sample of dry air at 25 °C contains 0.0319 mol N2, 0.00856 mol O2, ... The main components of dry air, by volume, are
1. 0 answers
2. asked by Kate
3. 830 views
Today Justin reached 1/11 the age of his mother was when he was bron. Today, Justin's mother is _____ times as old as Justin.
1. 0 answers
2. asked by Tom
3. 820 views
okay so i'm doing a scrapbook for my saint project and i was wondering if there is a software i can download which is like a
1. 4 answers
2. asked by kathy
3. 814 views
The brakes on a parked car fall and it accelerates at a constant rate, rolling into a lamp post down the hill. the car reaches a
1. 2 answers
2. asked by ron
3. 812 views
At a church bazzar they have a game of chance that consists of picking a two digit number(0-9).You can bet 1$ by picking a two
1. 0 answers
2. asked by maya
3. 807 views
If you add heat energy to water molecules i the form of ice,where does the energy go?
1. 0 answers
2. asked by Anonymous
3. 796 views
Which type of graph would be most appropriate to show the students in the debate club, the computer club and the ecology club
1. 2 answers
2. asked by Nick
3. 785 views
If a coffee can has a radius of 63.0 cm and a height of 15.8 cm find its volume round to neaerest cm3
1. 0 answers
2. asked by Anonymous
3. 774 views
Find any absolute max/min and local max/min for the function f(x)=x^3-4x+5 on the interval [0,5). Made sure to prove that these
1. 0 answers
2. asked by Janet
3. 745 views
While on the moon, the apollo astronauts enjoyed the effects on gravity so much smaller then that ont he earth. If neil
1. 1 answer
2. asked by Casey
3. 735 views
"All powers not delegated to the United States by the Constitution . . . are reserved to the States respectively, or to the
1. 5 answers
2. asked by Anonymous
3. 731 views
A small boy is flipping a piece of cake across the lunch room at school. He uses a fork as a catapult by holding the handle on
1. 2 answers
2. asked by micky
3. 725 views
Minimum Wage: The table shows minmum wage for three different years Year 1940 1968 1997 Wage ($) 0.25 1.60 5.15 (a) Make a
1. 0 answers
2. asked by jake
3. 721 views
The variable d represents the cost of a customer's meal, in dollar. The following expression represents the amount paid,
1. 4 answers
2. asked by chaya
3. 715 views
Suppose you deposit $5,000 in a bank which pays 10 percent interest compounded twice a year. The actual annual interest rate you
1. 3 answers
2. asked by mike
3. 713 views
Could I know the difference between these two schools. I go to a public school so Im not sure what a private school is. All that
1. 6 answers
2. asked by Anonymous
3. 713 views

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