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Questions Asked on February 7, 2013

At 298 K, the Henry\'s law constant for oxygen is 0.00130 M/atm. Air is 21.0% oxygen.At 298 K, what is the solubility of oxygen
1. 3 answers
2. asked by Colleen
3. 14,503 views
A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat. Given the specific heat of lead is 0.128 J/g∙°C, what
1. 1 answer
2. asked by Suizaranne
3. 10,323 views
a car starts from rest at constant acceleration of 2m/s2 at the same instant, a truck travelling at a constant speed of 10m/s
1. 16 answers
2. asked by kexy
3. 8,284 views
In a baseball a pitcher can accelerate a .15kg ball from rest to 98 mi/h in a distance of 1.7ma) what is the average force
1. 2 answers
2. asked by Lisa
3. 6,843 views
A rectangular garden 50 m. long and 34 m. Wide is surrounded by a uniform dirt road. Find the width of the road if the total
1. 1 answer
2. asked by Linda
3. 6,171 views
The parachute on a race car of weight 8,810 N opens at the end of a quarter-mile run when the car is traveling at 34 m/s. What
1. 1 answer
2. asked by Ray
3. 3,835 views
Nitric oxide reacts with chlorine to form nitrosyl chloride, NOCl. Use the following data to determine the rate equation for the
1. 1 answer
2. asked by Anonymous
3. 3,495 views
mention the types of disposal of fullness?
1. 5 answers
2. asked by joshua
3. 3,403 views
1.Which is the BEST summary of "LAFFF"? (1 point) Angela used a time machine to win a writing contest. Peter and Angela invented
1. 9 answers
2. asked by Erin
3. 3,393 views
Why are the tires for trucks carrying gasolineand other ﬂammable ﬂuids manufactured to be electrically conducting? 1. To
1. 1 answer
2. asked by Tiffany
3. 3,174 views
4Fe + 3O2 -> 2Fe2O3 + 1.65E3 kJ C) what is the enthalpy change for the formation of 23.6 g of iron(iii) oxide? I'm trying to
1. 1 answer
2. asked by A Canadian
3. 3,093 views
Ammonium ion (NH4^+) reacts with nitrite ion (NO2^-) to yield nitrogen gas and liquid water. The following initial rates of
1. 1 answer
2. asked by Anonymous
3. 3,046 views
lewis acid or lewis base? then draw the product.H3C^+ :NH3 ----> I'm assuming H3C is the acid and :NH3 is the base? As for
1. 8 answers
2. asked by Maura
3. 2,995 views
Find sec θ and csc θ. If tan θ =3 and cos θ>0. Please helpp, i don't get identities
1. 1 answer
2. asked by Oscar
3. 2,967 views
The length of a rectangular garden is 4 m greater than the width. the area is 77m^2. find the dimensions of the garden.
1. 2 answers
2. asked by Chrissy
3. 2,944 views
What fraction of a circle is 33-1/3% of a circle?
1. 2 answers
2. asked by Tim
3. 2,513 views
Calculate the theoretical percentage of water in gypsum, rounded to the nearest whole number %. (calcium sulfate dihydrate;
1. 2 answers
2. asked by tina
3. 2,493 views
a solution of h2so4 (aq) with a molal concentration of 6.25 m has a density of 1.3 g/mL. what is the molar concentration of this
1. 2 answers
2. asked by Felicia
3. 2,452 views
Freud's techniques and assumptions are most evident in today'sA) cognitive therapies. B) behavior therapies. C) biomedical
1. 5 answers
2. asked by Brook
3. 2,366 views
A scientist is performing an experiment on apowder. Which of the following is a sign that a chemical change has definitely
1. 2 answers
2. asked by Fatima
3. 2,249 views
At a concession stand, popcorn costs $1.10 and nachos cost $2.35. One day, the receipts for a total of 172 popcorn and nachos
1. 1 answer
2. asked by Annie
3. 2,135 views
a man stands on the roof of a building that is 30m tall and throws a rock with a velocity of magnitude of 40m/s at an angle of
1. 1 answer
2. asked by jm
3. 2,065 views
Alexandra decides to climb Mt. Krumpett, which is 5000 high. She determines that this will require a total of 3600 of energy for
1. 2 answers
2. asked by chemistry
3. 2,026 views
At constant volume, the heat of combustion of a particular compound is –3323.0 kJ/mol. When 1.489 g of this compound (molar
1. 1 answer
2. asked by Brianna
3. 1,975 views
A plastic rod is rubbed against a wool shirt,thereby acquiring a charge of −4.9 µC. How many electrons are transferred from
1. 1 answer
2. asked by Tiffany
3. 1,927 views
Calculate the molarity of a solution that contains 48g of NaCl in 250ml of solution.
1. 1 answer
2. asked by James
3. 1,919 views
Do you think that Joyce has the ability to beautifully describe scenery? Why or why not? Answer in complete sentences.
1. 3 answers
2. asked by kody
3. 1,912 views
Which best describes the transition from gas to liquid?
1. 2 answers
2. asked by Fatima
3. 1,906 views
The activation energy for a certain reaction is 113 KJ/mol. By what factor (how many times) will the rate constant increase when
1. 1 answer
2. asked by Anonymous
3. 1,890 views
In selecting software for the classroom, it is first necessary to ensure thatA) the software features both text and colorful
1. 1 answer
2. asked by Lor
3. 1,790 views
25.9 kJ + 1/2 H2 + 1/2 I2 -> HIB) how much energy is needed for the reaction of 4.57E24 molecules of iodine, I2, with excess
1. 1 answer
2. asked by A Canadian
3. 1,775 views
Mary's yard is a mess. She needs to hire someone to prune her trees and shrubs. A landscaping service she calls quotes her a
1. 4 answers
2. asked by Bell
3. 1,774 views
a projectile is launched in the horizontal direction. It travels 2.050 m horizontally while it falls 0.450 m vertically, and it
1. 1 answer
2. asked by Anonymous
3. 1,754 views
What other challenges do you think there would be for engineers designing a spacecraft to travel to mercury?
1. 4 answers
2. asked by Angie
3. 1,747 views
Write a division story of 25 divide by 5
1. 4 answers
2. asked by Lize
3. 1,727 views
An astronaut has a mass of 100 kg. She recedes from her spacecraft using spurts of gas from a small unit on her back. If the
1. 3 answers
2. asked by tash
3. 1,673 views
Heres a balanced equation:Na2CO3(aq)+2AgNO3 (aq) --> 2NaNO3(aq)+Ag2CO3 (s) From this equation, 10 mL of AgNO3 in this contains
1. 1 answer
2. asked by Jennifer
3. 1,659 views
''Dan saved $463 over the 12 weeks of summer break He saved$297 of it during the last 4 weeks. How much did he save during the
1. 4 answers
2. asked by Kiley
3. 1,635 views
A copy machine makes 60 copies per minute. A second copy machine makes 80 copies per minute. The second machine starts making
1. 1 answer
2. asked by Jacob
3. 1,632 views
a particle is subject to a force fx that varies with a position shown in figure P 7.15.find the work done by the force on the
1. 1 answer
2. asked by Anonymous
3. 1,551 views
1. Walking consumes approximately 100 kcal/mi. In the hydrolysis of ATP (ATP → ADP + Pi), the reaction that drives the muscle
1. 2 answers
2. asked by Blake
3. 1,500 views
Which of the following statements best describes what is happening in a water softening unit?The hard ions are all trapped in
1. 1 answer
2. asked by Layla
3. 1,487 views
An electroscope is a simple device consistingof a metal ball that is attached by a conductor to two thin leaves of metal foil
1. 1 answer
2. asked by Tiffany
3. 1,473 views
Equation:3CaCl2 (aq) + 2 Na3PO4 (aq) → Ca3(PO4)2 (s) + 6 NaCl (aq) How many grams of Ca3(PO4)2 are formed when 450.0 g NaCl
1. 2 answers
2. asked by Sarah
3. 1,464 views
Heres a balanced equation:Na2CO3(aq)+2AgNO3 (aq) --> 2NaNO3(aq)+Ag2CO3 (s) From this equation, 10 mL of AgNO3 in this contains
1. 1 answer
2. asked by Sarah
3. 1,456 views
Write an inequality that describes the region of the coordinate plane not included in the graph ofy<5x+1
1. 1 answer
2. asked by Casey
3. 1,437 views
What fraction is half of the fraction that is half of 1/2?
1. 4 answers
2. asked by Tim
3. 1,408 views
What is the Product of 1,4-Cyclohexadiene + KMnO4?
1. 1 answer
2. asked by Anonymous
3. 1,399 views
Nate's front yard was 50 feet wide. each time he pushed the mower along the length of the yard, he mowed a path 24 inches wide.
1. 2 answers
2. asked by Nakia
3. 1,368 views
I need help solving the integral of t * e^-3t dtI know that I have to solve using integration by parts and so I've let u=t to
1. 2 answers
2. asked by Anonymous
3. 1,366 views
Median family income in country x between 1990 and 1999 can be modeled by f(x)=1144.7(x-1990)+35,834 where x is the year.
1. 1 answer
2. asked by Anonymous
3. 1,349 views
Which of the following would be coded within the HCPCS Level II series code range of A4206-A8004?A. Ambulance ride to an
1. 1 answer
2. asked by arlene
3. 1,335 views
the 4th term of a geometric sequence is 1/2 and the tenth term is 1/128 find the 10th term?
1. 2 answers
2. asked by ian relacion
3. 1,314 views
Use the following values for mass and charge: an electron has mass me = 9.11×10-31 kg and charge -e, a proton has mass mp =
1. 0 answers
2. asked by R
3. 1,305 views
Maria throws an apple vertically upward from a height of 1.3m unit an initial velocity of velocity of 12.4m/s1. will the apple
1. 1 answer
2. asked by Jessica
3. 1,273 views
Potassium superoxide (KO2)reacts in the following equation:4KO2 + 2H2O +4CO2 =4KHCO3 + 3O2 If a person wearing an oxygen mask
1. 1 answer
2. asked by Alexus
3. 1,258 views
1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a
1. 5 answers
2. asked by Louis
3. 1,202 views
A golfer has to hit a ball over a tree that is 12.0 meters high from 40.0 meters away. The ball is hit with speed v at an angle
1. 2 answers
2. asked by Emilea
3. 1,169 views
1. When you hold a piece of chocolate in your hand, why does thechocolate melt? 2. Which is a larger unit of heat: calorie,
1. 3 answers
2. asked by alex
3. 1,163 views
A block of mass 3 kg is hung from a spring,causing it to stretch 21 cm at equilibrium, as shown below. The 3 kg block is then
1. 0 answers
2. asked by Anonymous
3. 1,135 views
The Industrial Revolution led to changes as the U.S. became more economically independent. Which of these changes occurred
1. 4 answers
2. asked by Cassie
3. 1,133 views
A sample of sucrose(table sugar) with a mass of 1.32g is burned in a 1L bomb calori meter. The temperature changed from 25degree
1. 1 answer
2. asked by Shazra
3. 1,127 views
it is a rectangle with a height to length ratio of 2 to 25 . if the window is 24 feet high. how long is it?______ft
1. 6 answers
2. asked by Zach
3. 1,126 views
What type of questions should a patient ask a doctor before getting cosmetic surgery?A. How many years has the doctor performed
1. 2 answers
2. asked by noah
3. 1,126 views
Which of the following would require more energy to heat it from 10°Cto 20°C? a. 200 kg of water b. 200 kg of aluminum c. 100
1. 1 answer
2. asked by edwin
3. 1,125 views
The temperature increase of an object depends on:a. its mass b. its velocity c. the material from which it is made d. answers a
1. 3 answers
2. asked by ricardo
3. 1,101 views
One of the few xenon compounds that form is cesium xenon heptafluoride (CsXeF7). How many moles of CsXeF7 can be produced from
1. 1 answer
2. asked by Kenah Smith
3. 1,100 views
A person invests $4500.oo into 2 different mutual funds. The first has a 4.5% interest rate the second 6%. He made a total of
1. 1 answer
2. asked by Skyler
3. 1,099 views
A runner covers one lap of a circular track 40.0 in diameter in 63.3 .For that lap, what was her average velocity? If she
1. 1 answer
2. asked by Anonymous
3. 1,071 views
During an occluded front, a fast-moving cold front overtakes a slower moving ____ front.
1. 2 answers
2. asked by Bell
3. 1,052 views
Can you please check my semester exam before I turn it in?1. Children who do poorly in school are primarily ______ learners. a.
1. 2 answers
2. asked by Cyn
3. 1,043 views
What structure do you get when you mix benzoic acid with H3O+? Where benzoic acid is a benzene ring with COOH attached to one of
1. 3 answers
2. asked by Anonymous
3. 1,039 views
2(7w-1w+7)>122 ? what work would i do? im just learning inequalties and i have a quiz tomorrow with problems like this, please
1. 1 answer
2. asked by PLEASE HELP ME
3. 1,037 views
At the dance, Lyndi and Josh danced 3/4 hour without stopping. This is 3/8 hour more rhan Kecia and Les danced. How long did
1. 2 answers
2. asked by Mike
3. 1,028 views
How to calculate a gravitational force exerted on the paralle to the incline if its mass is 20kg is pulled upwards by a force
1. 1 answer
2. asked by Kenneth
3. 1,020 views
what was travel in east Africa in the past like?
1. 4 answers
2. asked by Anonymous
3. 1,008 views
2. Given the following data, calculate the Keq for the denaturation reaction of β-lactoglobin at 25 oC.Δ Ho = -88 kJ/mol, Δ
1. 3 answers
2. asked by Blake
3. 1,003 views
Write the answer in simplest form: 1. 1/3-2/9=1/9; 2. 3/5-1/10=1/2; 3.1/2-1/8=3/8; 4. 2/3-1/6=1/2; 5. 7/12-1/3=1/4; 6.
1. 3 answers
2. asked by Thea
3. 1,002 views
A 5.7 cm thick layer of oil (n=1.46) is sandwiched between a 1.1cm-thick sheet of glass and a 2.5cm -thick sheet of polystyrene
1. 1 answer
2. asked by Michael
3. 996 views
What is best way to combine the two sentences?Some bands wear uniforms. Some bands play marches. 1> Some bands wear uniforms,
1. 1 answer
2. asked by Hayden
3. 992 views
In order to lose weight you have to ________.A. Burn more calories than you consume B. Eat less C. Burn less calories than you
1. 3 answers
2. asked by noah
3. 971 views
Two identical rods are placed end to end, separated by a gap of width D. Each rod has charge Q spread uniformly along its length
1. 1 answer
2. asked by Lindsey
3. 961 views
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water.4 Au(s) + 8
1. 3 answers
2. asked by Kenah Smith
3. 958 views
The development of an atomic bomb by the United States did which of these?A. pressured German leaders to surrender B.increased
1. 1 answer
2. asked by Sam
3. 954 views
We want to ﬁnd how much charge is on theelectrons in a nickel coin. Follow this method. A nickel coin has a mass of about 4.9
1. 1 answer
2. asked by Tiffany
3. 940 views
A helium-neon laser beam has a wavelength in air of 633 nm. It takes 1.48 ns for the light to travel through 34.0 cm of an
1. 0 answers
2. asked by Michael
3. 937 views
A block,mass 20kg,is pulled upwards by a force F along a plane inclined at 30 degree to the horizontal.it accelerate along the
1. 1 answer
2. asked by Kenneth
3. 930 views
Near San Francisco, where the vertically downward component of the earth's magnetic field is 6.8 x 10-5 T, a car is traveling
1. 0 answers
2. asked by PLEASE HELP
3. 927 views
One of the few xenon compounds that form is cesium xenon heptafluoride (CsXeF7). How many moles of CsXeF7 can be produced from
1. 1 answer
2. asked by Kenah Smith
3. 920 views
Would someone please proofread my broadcast news story.. I'd appreciate feedback.Thanks in advance A University student ran into
1. 8 answers
2. asked by Blaze
3. 915 views
My family went to starbucks. We ordered 3 drinks. My daughter's drink was .90 cents less than my drink and my sons drink was
1. 1 answer
2. asked by Molly
3. 914 views
At some automobile toll-collecting stations, athin metal wire sticks up from the road and makes contact with cars before they
1. 0 answers
2. asked by Tiffany
3. 914 views
A mass of 1kg on the earth is attracted with a force of 9,8 N.The raduis ofthe earth is 6,38 X 10m,calculate the mass of the
1. 0 answers
2. asked by Nobuhle
3. 913 views
No one, or Someone who bought a car for transportation was not considered sane.
1. 1 answer
2. asked by robin
3. 911 views
Which material would have a higher specific heat:a. a material made of heavier particles b. a material made of lighter particles
1. 1 answer
2. asked by ricardo
3. 909 views
Thursday, December 4, 2008 at 10:30pm by kim. PHYSICS 1. A 4.0 N force acts for 3 ... The following is a list of figures for a
1. 0 answers
2. asked by Anonymous
3. 907 views
The burning if 18.0 g of carbon produces 55.0 g of carbon dioxide. What is the theoretical yield of CO2? Calculate the percent
1. 2 answers
2. asked by Tim
3. 879 views
Which of the following describes why waves form?
1. 2 answers
2. asked by Bell
3. 867 views
1. When you summarize an informational article, you should (1 point)leave out minor details. use the author's words, including
1. 4 answers
2. asked by Someone
3. 859 views
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water.4 Au(s) + 8
1. 0 answers
2. asked by Kenah Smith
3. 856 views

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