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Questions Asked on October 14, 2010

Calculate the enthalpy change for the reaction:2S(s) + 3O2(g) --> 2SO3(g) Use the following thermochemical equations: Reaction
1. 2 answers
2. asked by Jordin
3. 7,374 views
vector b has x,y, and z components of 4.0, 6.0, and 3.0 units, respectively. Calculate the magnitude of b and the angles that b
1. 3 answers
2. asked by Anonymous
3. 6,786 views
For every girl taking classes at the martial arts school, there are 3 boys who are taking classes at the school. If there are
1. 10 answers
2. asked by Joe
3. 5,093 views
a 0.100m k2so4 solution has a freezing point of -0.43 degrees. what is the van hoff factors for this solution? kf=1.86degree/m?0
1. 3 answers
2. asked by lulu
3. 3,875 views
a rectangle with perimeter of 198 cm is divided into 5 congruent rectangles. What is the perimeter of one of the five congruent
1. 3 answers
2. asked by Kevin
3. 3,281 views
The following information applies to the market for a particular items in the absence of a unit excise tax:Price($ per unit)
1. 1 answer
2. asked by Anonymous
3. 3,064 views
How many silver atoms are there in 3.88g of silver
1. 2 answers
2. asked by ria
3. 2,995 views
How do command economies and market economies affect a worker's life?
1. 7 answers
2. asked by Cassie
3. 2,862 views
A daredevil on a motorcycle leaves the end of a ramp with a speed of 34.5 m/s as in the figure below. If his speed is 32.1 m/s
1. 2 answers
2. asked by blake
3. 2,498 views
A 0.25 mF capacitor is connected to a 9.0 V battery. What is the charge on the capacitor?
1. 1 answer
2. asked by sam
3. 2,414 views
a solution of sulfur (2.560g) in naphthalene (100g) freezes 0.68K lower the freezing point of pure naphthalene (353.10K). for
1. 3 answers
2. asked by lulu
3. 2,313 views
1.Tienes la maleta? No, no (lo/la) tengo.2. Mi tio tiene las maletas en su coche. Va a facturar (los/las) en el aeropuerto. 3.
1. 2 answers
2. asked by Jim
3. 2,209 views
How many kilograms of chlorine are in 26 kg of C2F3CL3?
1. 2 answers
2. asked by Palo Alto College
3. 2,072 views
Arthur (mass 78 kg) and Violet (mass 31 kg) are trying to play on a seesaw. If Violet sits 3.6 m from the fulcrum, at what
1. 5 answers
2. asked by Alexis
3. 2,045 views
calculate the theoretical yield (in grams) of the solid product, assuming that you use 1.0 g FeC2O4×2H2O and that oxygen is the
1. 2 answers
2. asked by sonya
3. 1,853 views
A. find y' by implicit differentiation.B. solve th equation explicitly for y and differentiate to get y' in terms of x. cos (x)
1. 1 answer
2. asked by Sasha
3. 1,736 views
"How fast is the area of the triangle formed by the ladder, the house, and the ground when the base of the ladder is 7 ft. away
1. 2 answers
2. asked by Guy
3. 1,735 views
Search: The barrels of the 16 in guns (bore diameter = 16 in. = 41 cm) on the World War II battleship U.S.S. Massachusetts were
1. 2 answers
2. asked by Anonymous
3. 1,605 views
wha tis the exact value of sin 9pi/4
1. 1 answer
2. asked by kia
3. 1,544 views
a ball is thrown directly upward with a velocity of 40 feet/seconds. its height in feet after t seconds is given by h(t)equals
1. 0 answers
2. asked by gabby pomle
3. 1,533 views
What mass of electrons would be required to just neutralize the charge of 3.9 grams of protons?
1. 1 answer
2. asked by Alyssa
3. 1,466 views
2-methyl-2hexanol is reacted with sulfuric acid at around 800C. The two products formed are 2-methyl-1-hexene (19%) and
1. 1 answer
2. asked by Deon
3. 1,427 views
In Fig. 8-49, a block slides down an incline. As it moves from point A to point B, which are 3.0 m apart, force acts on the
1. 2 answers
2. asked by Anonymous
3. 1,373 views
please help if you canAt a sand & gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic
1. 2 answers
2. asked by kim
3. 1,369 views
What is $1500 with 7% of tax?
1. 2 answers
2. asked by Owen
3. 1,360 views
A student's scores on four math tests were 89,92,95, and 85. What will he need to make on the 5th test to have an average of 93?
1. 2 answers
2. asked by Kenya
3. 1,347 views
What is the cube root of x to the 7th power?
1. 2 answers
2. asked by Natalie
3. 1,345 views
find the greatest four-digit number that has exactly three positive factors.
1. 1 answer
2. asked by Emma
3. 1,343 views
What are the charges of the ions in an ionic compound containing iron(III) and fluoride ions?a)iron(III)- i got 3+ b) flouride-
1. 2 answers
2. asked by Hannah
3. 1,341 views
what are two ways the united states government helped the former slaves after the civil war
1. 1 answer
2. asked by Anonymous
3. 1,293 views
A rock with a Weight of 156.8 newtons falls 5 meters. What potential energy does it have left before the end of its fall?
1. 4 answers
2. asked by Chris
3. 1,291 views
Two parallel wires in a horizontal plane carry currents I1 and I2 to the right. The wires each have a length L and are separated
1. 1 answer
2. asked by Anonymous
3. 1,291 views
Copper metal can be obtained by heating copper oxide in the presence of carbon monoxide, CO, according to the reaction:CuO(s) +
1. 2 answers
2. asked by Jordin
3. 1,220 views
Calculate the tangential speed of the earth around the sun (assuming a circular orbit).
1. 2 answers
2. asked by Tamara
3. 1,200 views
my ten digit is double my one digit. i am less than 70 and greater than 60. what number am i
1. 7 answers
2. asked by san miguel elementary
3. 1,193 views
Can you please check the following sentences? I really hope you can have a look at them.1) The King of Sicily gave a jeweller
1. 2 answers
2. asked by Franco
3. 1,179 views
Three girls paid $100 each, a total of $300, to share a Motel Room. Later, the desk clerk realizing she should have only charged
1. 2 answers
2. asked by Delaney
3. 1,175 views
a ball rolls off an incline at an angle of 30 below the horizontal at a velocity of 22m/s. how far from the base will the ball
1. 1 answer
2. asked by jane
3. 1,163 views
Write a formula for the compound that forms from barium and the following polyatomic ion.(a) hydroxide (b) carbonate (c)
1. 3 answers
2. asked by Hannah
3. 1,155 views
Underline each compound subject once and each compound predicate twice. Then write compound subject or compound predicate.1.
1. 4 answers
2. asked by 3 GRADE
3. 1,134 views
Find the linearization of the function below at x = π/3.?y=sin(x)/x Your answer should be a linear function of x where the
1. 1 answer
2. asked by Vick
3. 1,129 views
A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees
1. 0 answers
2. asked by Melanie
3. 1,110 views
A bullet with a mass of 55 grams moving with a speed of 100 m/s slams into and wedges in a 1.9 kilogram block of wood supported
1. 4 answers
2. asked by Fred
3. 1,109 views
What are some examples of theories concerning sexual orientation, hormones, and the brain? Which one do you feel is most
1. 1 answer
2. asked by Sue
3. 1,107 views
What is the effect of the following on the separation of the mixture(hexane and toluene)?a. A soluble, nonvolatile impurity b. a
1. 1 answer
2. asked by Anonymous
3. 1,095 views
Determine the rate at which the surface area is changing with respect to time at t=2 min, assuming that r = 3 at t = 0Assume
1. 0 answers
2. asked by Help asap!! plz
3. 1,090 views
For my speech class we need to make a speech on a persuasive topic that will be interesting and fun to hear. It needs to be a
1. 1 answer
2. asked by Rachel
3. 1,083 views
Find the 1st derivative of the function:y = 1/4 sin^2 (2x) So confused...
1. 1 answer
2. asked by Jack
3. 1,071 views
What credential must you possess to obtain a teaching certificate in Florida:
1. 1 answer
2. asked by Anonymous
3. 1,036 views
express 55 minutes as a fraction of 1 1/3 hours
1. 2 answers
2. asked by Kris
3. 1,027 views
A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from
1. 1 answer
2. asked by sandhya
3. 1,024 views
what volume of hydrochloric acid of density 1.18g cm3 and containing35.0% by mass must be allowed to react with zinc in order to
1. 3 answers
2. asked by lulu
3. 1,022 views
A dog is tied to a leash 15 feet long. The dog wants to get to a bone that is 20 feet away. How will he get to the bone?
1. 2 answers
2. asked by Rebbeca
3. 1,013 views
We have to find the first and second derivative of f(x)=x^(2/3)(6-x)^(1/3)I have the first derivative as being
1. 3 answers
2. asked by Please help
3. 997 views
Eight books, each 8.5 cm thick with mass 1.3 kg, lie flat on a table.How much work is required to stack them one on top of
1. 1 answer
2. asked by Anonymous
3. 992 views
Nafari Company's sales budget has the following unit sales projection for each quarter of the calendar year 2011.January -March
1. 0 answers
2. asked by sylvia
3. 980 views
In 2009 the American League’s New York Yankees won the World Series. The Yankees have played in a total of 40 World Series. Of
1. 1 answer
2. asked by pow
3. 980 views
The half-life of Radium-223 is 11.43 days. If a sample has a massof 900 mg, find the mass (in mg) that remains after 5 days
1. 2 answers
2. asked by Connor
3. 969 views
A group of friends took a bus trip. Each traveler gave the bus driver a tip using the same nine coins. The total tip was $8.41.
1. 1 answer
2. asked by October
3. 959 views
An empty elevator of mass 2.7x10^2kg is pulled upward by a cable at an acceleration of 1.2m/s. What is the tension in the cable?
1. 1 answer
2. asked by Jill
3. 940 views
from civil peace by chinua achebeehy do the theives help the lwegbus shout for the poice? that's is ironic about what they say
1. 0 answers
2. asked by steph
3. 927 views
Variation in biology isa) inevitable b) exciting c) the raw material for natural selection d) best described by statistics e)
1. 1 answer
2. asked by Bala
3. 919 views
Determine the number of terms in the expression 14m - 16.
1. 0 answers
2. asked by Jack
3. 913 views
I am very confused with this problem, i tried using the percent yeild but i got stuck. Can u help?The O'Keefe's have 75 gallons
1. 1 answer
2. asked by Ingrid J.
3. 908 views
Rosalyn works no more than 16 hours a week during the school year. she is paid $10 and hour for tutoring geometry students and
1. 2 answers
2. asked by jeanne
3. 902 views
Nafari Company's sales budget has the following unit sales projection for each quarter of the calendar year 2011.January -March
1. 1 answer
2. asked by sylvia
3. 900 views
A liter of perspiration lost by the body represents _____ kcalories?
1. 1 answer
2. asked by Tawny
3. 896 views
would sarcasm be also considered as ironic?
1. 2 answers
2. asked by Amy
3. 894 views
a circuit contains a 9v battery and two 1 ohm bulbs. what is the voltage drop across each.
1. 2 answers
2. asked by yUo
3. 893 views
At some amusement parks, to get on a moving "car" the riders first hop onto a moving walkway and then onto the cars themselves.
1. 0 answers
2. asked by Danielle
3. 888 views
the graph of f(x) passes through the point (0,6). the slope of f at any point P is 2 times the y-coordinate of P. find f(1)
1. 0 answers
2. asked by Beth
3. 871 views
I know nothing about chemistry, but am wondering if someone could help me with these.1) Balance this redox reaction using the
1. 2 answers
2. asked by Sara
3. 870 views
A track athlete runs exactly one complete lap of the track, 400 m circumfrence, in 4.02x10^1 seconds. What is the velocity of
1. 2 answers
2. asked by annonomus
3. 868 views
A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s.What is the average power of the engine?
1. 1 answer
2. asked by mike
3. 865 views
Rewrite each sentence, placing commas where they are needed. Uderline each compound subject once compound predicate twice.1.Your
1. 2 answers
2. asked by LUZ
3. 863 views
A skier skiing downhill reaches the bottom of a hollow with a velocity of 20.0m/s, and then coasts up a hill with a 12 degree
1. 0 answers
2. asked by Jill
3. 861 views
half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 grams?
1. 3 answers
2. asked by Anonymous
3. 853 views
An excess of aqueous AgNO3 reacts with24.5 mL of 5 M K2CrO4(aq) to form a precip- itate. What is the precipitate? 1. AgNO3 2.
1. 1 answer
2. asked by John
3. 849 views
Determine the work a hiker must do on a 15.8 kg backpack to carry it up a hill of height h = 13.5 m. The hill is not an even
1. 1 answer
2. asked by Anonymous
3. 849 views
Are these correct?lim x->0 (x)/(sqrt(x^2+4) - 2) I get 4/0= +/- infinity so lim x->0+ = + infinity? and lim x->0- = + infinity?
1. 1 answer
2. asked by Chelsea
3. 820 views
Baseball player A bunts the ball by hitting it in such a way that it acquires an initial velocity of 1.9 m/s parallel to the
1. 0 answers
2. asked by Stacy
3. 812 views
a ball is thrown directly upward with a velocity of 40 feet/seconds. its height in feet after t seconds is given by h(t)equals
1. 0 answers
2. asked by gabby pomle
3. 811 views
Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.
1. 1 answer
2. asked by Amber
3. 807 views
a spotlight on the ground shines on a wall 12 m away. if a man 2m tall walks from the spotlight toward the building at a speed
1. 1 answer
2. asked by Sasha
3. 791 views
Your school has contracted with a professional magician to perform. The school has guaranteed an attendance of at least 1000
1. 1 answer
2. asked by connie
3. 789 views
U.S. cigarette makers face enormous punitive damage penalties after losing a series of class-action lawsuits that heaped
1. 0 answers
2. asked by raja
3. 780 views
Assume that showing a car is a Bernoulli trial, and each time she shows a car,there is a probability of 0.25 that the customer
1. 0 answers
2. asked by Hoon
3. 779 views
Is there any way i can just get these problems set up? I just need help with the steps on how to do it.A box weighing 600 N is
1. 2 answers
2. asked by Samantha
3. 774 views
The force shown in the figure below is the net eastward force acting on a ball. The force starts rising at t=0.020 s, falls back
1. 2 answers
2. asked by jaz
3. 773 views
I have a few questions about T-Matrix.In excel, I am suppose to work with powered matrices to construct a weighted T matrix,
1. 0 answers
2. asked by Lisa
3. 772 views
Can you check these thanks.Part 1 Directions: Répondez selon le modèle. Elle va souvent à Montréal? Oui, elle y va souvent.
1. 1 answer
2. asked by Rachel
3. 770 views
An executive invests $25,000, some at 8% and some at 4% annual interest. If he receives an annual return of $1600, how much is
1. 1 answer
2. asked by Jay
3. 770 views
Given the graph of f(x) find the graph of 2 f( -3x - 2) - 4Is this correct??? First, compress the graph horizontally by 3.
1. 1 answer
2. asked by Blake
3. 770 views
The side lengths of two different cubes are 36 cm and 45 cm. What is the ratio of the volume of the smaller to the volume of the
1. 3 answers
2. asked by Anonymous
3. 766 views
I have a series of questions that I did. They lead up to the last question I can't solve. Could you check my math and help me
1. 0 answers
2. asked by Shane
3. 765 views
15. Observation reports need to make a clear distinction between the description of behaviors and the ____ drawn from the
1. 3 answers
2. asked by Leyanet
3. 750 views
what happened during the spanish invasion of mexico?
1. 1 answer
2. asked by deisharis
3. 748 views
A 30 ounce iron bar at 425 degrees Fahrenheit is placed in 2.00 quarts of water at 80.0 degrees Fahrenheit. What will be the
1. 1 answer
2. asked by Samantha
3. 746 views
There are 16 tennis players in a single elimination tournament. How many tennis mathches will be played during the
1. 1 answer
2. asked by somej
3. 734 views
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 62 kg person
1. 2 answers
2. asked by Blake
3. 726 views

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