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Questions Asked on November 17, 2012

Given the following reaction at equilibrium, if Kc = 1.90 x 1019 at 25.0 °C, Kp = __________.H2 (g) + Br2 (g) ↔ 2 HBr (g)
1. 2 answers
2. asked by Josh G.
3. 8,655 views
If √x+√y=10 and y(16)=36, find y'(16) by implicit differentiation.If somebody could please help me by explaining how to
1. 1 answer
2. asked by Ali
3. 7,521 views
Use standard enthalpies of formation to calculate ΔHrxn° for each reaction. (See the appendix. Enter your answer to the tenth
1. 7 answers
2. asked by DeeDee
3. 7,270 views
1.Identify the part, whole, and percent in the following statement: Find 15% of 750. (1 point) part = 750, whole = n, percent =
1. 33 answers
2. asked by Delilah
3. 6,801 views
Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
1. 1 answer
2. asked by JOHN
3. 6,361 views
Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability
1. 2 answers
2. asked by Katy
3. 6,093 views
A 0.08425 g sample of gas occupies 10.0-mL at 292.5 K and 1.10 atm. Upon further analysis, the compound is found to be 13.068% C
1. 2 answers
2. asked by Nikki
3. 6,067 views
Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium
1. 2 answers
2. asked by Josh G.
3. 4,561 views
The value of Keq for the equilibriumH2 (g) + I2 (g) ↔ 2 HI (g) is 794 at 25 °C. What is the value of Keq for the equilibrium
1. 2 answers
2. asked by Josh G.
3. 4,508 views
NH4NO3(s) NH4+(aq) + NO3−(aq)In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in
1. 3 answers
2. asked by DeeDee
3. 4,415 views
A street lamp weighs 150 N. It is supported by two wires that form an angle of 100° with each other. The tensions in the wires
1. 2 answers
2. asked by Lyna
3. 4,190 views
Unpolarized light passes through six successive Polaroid sheets each of whose axis makes a 59 degree angle with the previous
1. 2 answers
2. asked by Lauren
3. 3,966 views
It takes 3.38 J of work to stretch a Hooke’s-lawspring 5.63 cm from its unstressed length. How much the extra work is required
1. 1 answer
2. asked by jason
3. 3,198 views
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of
1. 1 answer
2. asked by Anonymous
3. 3,046 views
A common laboratory reaction is the neutralization of an acid with a base. When 50.0 mL of the .500 M HCl at 25 C is assed to 50
1. 4 answers
2. asked by Jan
3. 3,018 views
Point P is on the rim of a wheel of radius 2.0 m. At time t = 0, the wheel is at rest, and P is on the x axis. The wheel
1. 3 answers
2. asked by terry
3. 2,404 views
Find the ratio of bananas to oranges. WRite the ratio as a fraction in simplest form. Then explain its meaning.1/3? 1 banana to
1. 3 answers
2. asked by Jerald
3. 2,366 views
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a
1. 1 answer
2. asked by Natalie
3. 2,269 views
Write each rate as a unit rate14 hours in 2 weeks 7 hours in 1 week? 36 pieces of candy for 6 children 6pieces of candy for 1
1. 5 answers
2. asked by Jerald
3. 2,224 views
An crate weighing 510 N is resting on a plane inclined 30° above the horizontal.(a) Calculate the magnitude of the acceleration
1. 1 answer
2. asked by yoyoma
3. 2,176 views
A block of mass m = 3.6 kg, moving on a frictionless surface with a speed vi=9.3m/s makes a perfectly elastic collision with a
1. 1 answer
2. asked by terry
3. 2,159 views
The diagram shows a solid metal cylinder.The cylinder has base radius 2x and height 9x. E cylinder is melted down and made into
1. 1 answer
2. asked by Eleanor
3. 1,933 views
Two waves in one string are described by the wave functionsy1 = 2.90 cos (3.80x - 1.50t) y2 = 3.90 sin (4.80x - 2.10t) a) where
1. 1 answer
2. asked by Hau
3. 1,791 views
Terry often gets lost when driving places. It seems he just can't understand maps and often confuses north with south. Terry is
1. 7 answers
2. asked by allee
3. 1,736 views
20+2x/5-x For what value of x is the rational expression below equal to zero?
1. 2 answers
2. asked by myra
3. 1,731 views
How far apart must two protons be if the magnitude of the electrostatic force acting on either one due to the other is equal to
1. 2 answers
2. asked by Guy
3. 1,613 views
estimate the enthalpy change for each of the following reaction:a) H2C=O(g)+HCl(g .....> H3C-O-Cl(g) b)H2O2(g)+2CO(g).....>
1. 3 answers
2. asked by oluchi
3. 1,584 views
Suppose X is a uniform random variable with C = 20 and d = 90. Find the probability that a randomly selected observation is
1. 1 answer
2. asked by Marie
3. 1,567 views
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a
1. 2 answers
2. asked by Natalie
3. 1,400 views
The number of arrivals per period is distributed according to the poisson with the expected value of 0.75 unit per period. the
1. 1 answer
2. asked by FRED
3. 1,395 views
A 50 kg uniform ladder, 5.0 m long, is placed against a smooth wall at a height of h = 3.7 m. The base of the ladder rests on a
1. 0 answers
2. asked by jenn
3. 1,334 views
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a
1. 2 answers
2. asked by Natalie
3. 1,316 views
Three men were walking down a street talking when they met a fourth man. If the fourth man knew that two of the men always lied
1. 1 answer
2. asked by Sara Beth
3. 1,310 views
A uniform ladder 8.09 m long and weighing201.0 N rests against a smooth wall. The coefficient of static friction between the
1. 0 answers
2. asked by helpplz
3. 1,309 views
Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st
1. 18 answers
2. asked by amar chauhan
3. 1,294 views
Use the table to calculate an approximate enthalpy or heat of reaction for the combustion of one mole of methane gas (CH4) to
1. 1 answer
2. asked by Anonymous
3. 1,268 views
A force in the +y direction applied at the point x=2.3m,y=1.4m gives rise to a torque of 39n*m about the origin. Find the
1. 0 answers
2. asked by jenn
3. 1,266 views
A circular disk of radius 30 cm is rotating with an angular velocity of 2 radians / s. What is the tangential velocity of a
1. 0 answers
2. asked by Mark
3. 1,251 views
A vertical tower is supported by guy wires anchored at a point on the ground. The longer wire is attached to the top of the
1. 1 answer
2. asked by Melia
3. 1,242 views
A penny, a nickel and a dime and a quarter are tossed. What is the probability of obtaining at least three heads?
1. 1 answer
2. asked by Sara Beth
3. 1,236 views
The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the
1. 0 answers
2. asked by Erika
3. 1,216 views
Therese Felser manages a grocery warehouse which encourages volume shopping on the part of its customers. Therese has discovered
1. 0 answers
2. asked by Andrew
3. 1,178 views
A farmer is planting a crop straight line with three feet of distance between each plant. If planted 23, what is the distance
1. 2 answers
2. asked by Anonymous
3. 1,174 views
Three blocks are in contact with each otheron a frictionless horizontal surface. A 417 N horizontal force is applied to the
1. 0 answers
2. asked by alice
3. 1,136 views
The price of a small cabin is $40,000. The bank requires a 5% down payment. The buyer is offered two mortgage options: 20-year
1. 5 answers
2. asked by kaitlyn Blackmon
3. 1,131 views
Length of rectanngle is 1 cm more than width. If length of rectangle is doubled the area is increased by 30cm2. find dimensions
1. 1 answer
2. asked by Dipti
3. 1,129 views
A 1.60 102-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The
1. 1 answer
2. asked by Anonymous
3. 1,126 views
To drive a typical car at 40 mph on a level road for one hour requires about 3.2 × 10^7 J of energy. Suppose one tried to store
1. 1 answer
2. asked by terry
3. 1,108 views
A petting zoo has 5 lambs 11 rabbits 4 goats and 4 piglets. Find the ratio of goats to the total number of animals. THen explain
1. 3 answers
2. asked by Jerald
3. 1,108 views
If the multiplier is 4, a $10 billion increase in autonomous investment will cause a
1. 0 answers
2. asked by donald
3. 1,107 views
Charlie and Peter are driving around a racetrack. Charlie drives at an average speed of 108 miles per hour. Peter drives at an
1. 1 answer
2. asked by Chris
3. 1,105 views
Solve the inequality. 42<-6d
1. 2 answers
2. asked by Shay
3. 1,102 views
Consider a 58.4 g sample of H2O(g) at 125°C. What phase or phases are present when -162 kJ of energy is removed from this
1. 1 answer
2. asked by Sarah
3. 1,085 views
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct
1. 7 answers
2. asked by hi
3. 1,082 views
A bus stopped at Gulgong, 25% of the passengers got off the bus and 3 new passengers got on. At the next stop,3 quarter of the
1. 1 answer
2. asked by charlie
3. 1,075 views
Jayson has 789 cubes hammy had 890 how much in all
1. 1 answer
2. asked by Karen
3. 1,058 views
a tank is made in the shape of a rectangular prism, measuring 12 cm by 16 cm by 10 cm.It is full of water.A small rectangular
1. 1 answer
2. asked by charlie
3. 1,053 views
we had to go 30km through the city and then 30km through the country.Through the city we averaged 40km/h and through the country
1. 2 answers
2. asked by charlie
3. 1,047 views
A sphere of copper is subjected to 89.7 MPa of pressure. The bulk modulus is 130 GPa. a) By what fraction does the volume of the
1. 0 answers
2. asked by Brenda
3. 1,044 views
The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 5.4 m/s. If nonconservative
1. 0 answers
2. asked by Donald
3. 1,037 views
the temperature of 50.0g of water changes from 28.5°C to 26.9°C when 1.00g of ammonium bromide, NH4br(s), dissolves. What is
1. 1 answer
2. asked by Anonymous
3. 1,029 views
3. Ohm’s law states that the current flowing in a circuit varies directly as the applied voltage and inversely as the
1. 1 answer
2. asked by David
3. 1,027 views
Vectors A and B are in the xy plane and their scalar product is 20.6 units.?If A makes a 27.8 angle with the x axis and has
1. 1 answer
2. asked by Emma
3. 1,011 views
According to Gardner,a)a single general ability underlies all of our abilities to adapt to our environment. b)intelligence is a
1. 5 answers
2. asked by allee
3. 1,000 views
How many grams of solute are required to prepare 500ml of 0.5M urea solution,CO(NH2)2?
1. 1 answer
2. asked by miah
3. 981 views
what number is 100 times less than 600
1. 1 answer
2. asked by charlie
3. 969 views
Use the table to calculate an approximate enthalpy or heat of reaction for the combustion of one mole of methane gas (CH4) to
1. 1 answer
2. asked by Anonymous
3. 965 views
Cross-cultural data find that when racial gaps exist in other cultures, it is the _____________________ groups that typically
1. 1 answer
2. asked by allee
3. 942 views
a bolt located 50mm from the center of an auto wheel is tightened by the couple shown for .10 seconds. determine the resulting
1. 0 answers
2. asked by george
3. 932 views
A sample containing 4.8g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant.What is the new volume if
1. 2 answers
2. asked by Boo Boo
3. 902 views
One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site.
1. 0 answers
2. asked by Allen
3. 902 views
Suppose the coefficient of static friction between the road and the tires on a Formula One car is 0.7 during a Grand Prix auto
1. 1 answer
2. asked by fadsfads
3. 902 views
For the emission spectrum of Be3+, calculate the lowest wavenumber νˉ (in inverse meters) of light produced by electron
1. 3 answers
2. asked by Anonymous
3. 900 views
Fig P9 shows a drawbridge being rasied by a cable EI. The structure is a loaded truss consisting of a pinned assembly of
1. 0 answers
2. asked by CHAI
3. 890 views
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a
1. 1 answer
2. asked by Natalie
3. 884 views
A mother wnats to invest $6,000 for her son's future education. She invests a portion of the money in a bank certificate of
1. 1 answer
2. asked by Mark
3. 870 views
Suppose x is a uniform random variable with c=10 and d=70. Find the probability that a randomly selected observation is between
1. 0 answers
2. asked by Deane
3. 838 views
A cubic centimeter is the same as 1 mL. If a humpback whale has more than 1 kL of blood, how many cubic centimeters of blood
1. 1 answer
2. asked by Mary
3. 825 views
In Larry Niven’s science fiction novelRingworld, a ring of material of radius 1.54 × 1011 m rotates about a star with a ro-
1. 1 answer
2. asked by helpplz
3. 821 views
A uniform rod of length L and mass m initially at rest is struck by a horizontal force F0 a distance x below the pivot O. The
1. 1 answer
2. asked by Jake
3. 810 views
Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
1. 1 answer
2. asked by Josh G.
3. 799 views
he kind of economy that was created in Pittsburgh is calleda. post-industrial. c. post-modern. b. commodity-based. d.
1. 3 answers
2. asked by Katt13unknownchika
3. 798 views
atoms contain charged particles called protons and electrons. each proton has a charge of +1, and each electron has a charge of
1. 1 answer
2. asked by Shay
3. 784 views
Harriet needs to ship a small vase. The box she will use has a volume of 216 cubic inches. If the side lengths are all the same,
1. 3 answers
2. asked by Lisa John
3. 782 views
Calculate the molarity of 38.5 mL of 1.80 M HNO3 diluted to 0.130 L with water
1. 1 answer
2. asked by Linda
3. 750 views
A recording camera is located 2500 feet from the launch pad for recording a rocket launch. As the rocket lifts off, the angle of
1. 3 answers
2. asked by BA
3. 717 views
A 5-kg box is released on a 30 degree incline and accelerates down the incline at 2.79 m/s^2. To the nearest tenth of a Newton,
1. 1 answer
2. asked by Danielle
3. 713 views
A shot-putter puts a shot (weight = 71.3 N) that leaves his hand at distance of 1.62 m above the ground.(a) Find the work done
1. 0 answers
2. asked by Anonymous
3. 712 views
At a certain hospital, 40 patients have lung cancer, 30 patients smoke, and 25 havelung cancer and smoke. Suppose the hospital
1. 1 answer
2. asked by Sara Beth
3. 711 views
Two radar stations A and B, are separated by horizontal distance of (a=500 metres), they both track the position of a plane C by
1. 0 answers
2. asked by ryan
3. 700 views
An investor invested a total of $500 in two mutual funds. One fund earned a 8% profit while the other earned a 4% profit. If the
1. 1 answer
2. asked by Samantha
3. 684 views
Jose has 9 more comic books than Robin.Robin has 5 more comic books than Lee. If jose has 23 comic books,how many comic books
1. 2 answers
2. asked by Shay
3. 682 views
A heat engine operates between two reservoirs at temperatures of 19.7oC and 294oC. What is the maximum efficiency possible for
1. 0 answers
2. asked by Erika
3. 678 views
anton plan that he can throw at a dart board from a distance of 2 meters and hit the 5 centimeters wide bull's eye if he throw
1. 0 answers
2. asked by michaelangelo
3. 676 views
What is magnesium oxide?a. Polyatomic ion b. Ionic compound containing polyatomic ion c. Monatomic ion d. Oxyanion Is the answer
1. 2 answers
2. asked by Anonymous
3. 667 views
Estimate the change in energy when solid rubidium reacts with gaseous diatomic chlorine molecules. Express your answer in units
1. 10 answers
2. asked by amar chauhan
3. 667 views
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct
1. 7 answers
2. asked by Basim
3. 661 views
Estimate the change in energy when solid rubidium reacts with gaseous diatomic chlorine molecules. Express your answer in units
1. 7 answers
2. asked by Basim
3. 656 views
When saving a document or drawing, you determine the destination folder in which the file will be save byA. Making a selection
1. 0 answers
2. asked by bambi
3. 656 views
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy
1. 0 answers
2. asked by Erika
3. 652 views

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