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Questions Asked on March 17, 2012

Calculate ΔSfus and ΔSvap for HF.Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I
1. 4 answers
2. asked by Srah
3. 20,827 views
A block of mass 0.229 kg is placed on top of a light, vertical spring of force constant 4665 N/m and pushed downward so that the
1. 1 answer
2. asked by beavis
3. 11,158 views
The balanced net ionic equation for the neutralization reaction involving equal molar amounts of HNO3 and KOH is ________.Expres
1. 2 answers
2. asked by Anonymous
3. 6,432 views
Consider the following reaction at 298 K:C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139
1. 3 answers
2. asked by Leila
3. 5,875 views
The diagram shows a spinner with six numbered sections.(where it has number 2 twice, # 1 triple & # 6 once )Some of the sections
1. 5 answers
2. asked by pooja
3. 5,239 views
A law firm has six senior and fourteen junior partners. A committee of 3 partners is selected at random to represent the firm at
1. 1 answer
2. asked by Emma
3. 5,133 views
Write the slope -intercept equation for the line with the slope-1/4 and y-intercept(0,-2) and graph the line.Show work.
1. 2 answers
2. asked by sherry
3. 3,180 views
Which of the following is not amphiprotic?a)H2O c)NH4+ e)all choices are amphiprotic b)HSO4 – d)H2PO4– need help!
1. 1 answer
2. asked by bob
3. 2,976 views
A submerged scuba diver looks up towards the calm water of a lake and notes that the Sun appears to be 20 from the vertical. The
1. 2 answers
2. asked by Barry
3. 2,829 views
a rectangular pool has an area of 880ft. the lenght is 10 feet longer than thw width. find the dimensions of the pool. solve by
1. 2 answers
2. asked by Anonymous
3. 2,664 views
what are the spectator in this equation Ba(aq)+2I(aq)+2Na(aq)+SO4(aq)=BaSO4(s)+2I(aq)+2Na(aq)Isn't it 2I(aq) and the Na(aq)?
1. 1 answer
2. asked by diane
3. 2,445 views
Spam Corp. is financed entirely by common stock and has a beta of 1.0. The firm is expected to generate a level, perpetual
1. 2 answers
2. asked by Samantha
3. 2,323 views
In 1980, over San Francisco Bay, a large yo-yo was released from a crane. Suppose the yo-yo was 153 kg, and it consisted of two
1. 2 answers
2. asked by M
3. 2,281 views
Find an angle between 0 and 2ð that is coterminal with the given angle.-8pi/3 A sector of a circle has a central angle of 60°.
1. 2 answers
2. asked by John
3. 2,267 views
A large fish tank is filled with water (of refractive index 1.33). One side of the tank is made of a parallel-sided piece of
1. 3 answers
2. asked by Barry
3. 2,252 views
The pendulum bobs in the figure are made of soft clay so that they stick together after impact. The mass of bob B is 14 times
1. 3 answers
2. asked by Angelina
3. 2,170 views
Two children, each with mass m = 11.0 kg, sit on opposite ends of a narrow board with length L = 4.5 m, width W = 0.30 m, and
1. 1 answer
2. asked by Katie
3. 2,157 views
The price of a pair of shoes is $63.20. The sales tax rate is 4.5 percent. How much sales tax would you pay if you bought these
1. 3 answers
2. asked by lol
3. 2,147 views
The Acme Car Company claims that at most 8% of its new cars have a manufacturing defect. A quality control inspector randomly
1. 1 answer
2. asked by vikram
3. 2,043 views
A train is rounding a circular curve whose radius is 1.87E+2 m. At one instant, the train has an angular acceleration of 1.51E-3
1. 2 answers
2. asked by Katie
3. 1,922 views
How many liters of gaseous carbon monoxide at 27 Celsius and 0.247 atm can be produced from the burning of 65.5 g of carbon
1. 4 answers
2. asked by Anonymous
3. 1,715 views
Exactly 100 mL of 0.14 M nitrous acid (HNO2) are titrated with a 0.14 M NaOH solution. Calculate the pH for the following.(a)
1. 2 answers
2. asked by Tanya
3. 1,705 views
Why is a measured amount of water needed to determine the specific heat of a metal object?
1. 1 answer
2. asked by Doreen
3. 1,680 views
Three particles, each of mass 3.0 kg, are fastened to each other and to a rotation axis by three massless strings, each 0.360 m
1. 2 answers
2. asked by Katie
3. 1,655 views
What geometric figure does a regular polygon begin to resemble as the number of sides increases?
1. 2 answers
2. asked by Anonymous
3. 1,581 views
An urn contains four red balls and three white balls. A sample of 2 balls is selected at random from the urn. What is the
1. 2 answers
2. asked by Emma
3. 1,542 views
Right triangle ABC is similar to triangle XYZ. If the length of side AB is 30 inches, the length of side BC is 60 inches, and
1. 2 answers
2. asked by Vanessa
3. 1,508 views
Suppose the spring in this spring-powered rifle has a spring constant of k = 1,000 N/m. How much work can it do in accelerating
1. 1 answer
2. asked by christina
3. 1,414 views
Could someone explain this question to me?I attempted the question and here is why I chose the answer below. Thank you!
1. 1 answer
2. asked by Melinda
3. 1,413 views
The ion HPO4–2 has both a conjugate base as well as a conjugate acid. The conjugate base of this ion is (1) while the
1. 1 answer
2. asked by bob
3. 1,276 views
A 0.01-kg baseball traveling in a horizontal direction with a speed of 11 m/s hits a bat and is popped straight up with a speed
1. 1 answer
2. asked by opp
3. 1,251 views
In the railroad freight yard, an empty freight car of mass m rolls along a straight level track at 1.1 m/s and collides with an
1. 2 answers
2. asked by Priyanka
3. 1,247 views
I posted this question already but you never replied back :(Consider the following reaction at 298 K: C(graphite) +2Cl2 (g)
1. 3 answers
2. asked by Leila
3. 1,223 views
If a bottle of nail polish remover contains 176 mL of acetone, how much heat would be released by its complete combustion? The
1. 1 answer
2. asked by Anonymous
3. 1,211 views
You are asked to hang a uniform beam and sign using a cable that has a breaking strength of 372 N. The store owner desires that
1. 0 answers
2. asked by Keith
3. 1,211 views
A 30.00mL sample of a clear saturated solution of PbI2 requires 14.7mL of a certain AgNO3 for its titration.I^-(saturated
1. 4 answers
2. asked by brad
3. 1,178 views
Consider the function f(x)=3x^2 – 5x on the interval [-4,4]. Find the average slope of the function on this interval.By the
1. 1 answer
2. asked by john
3. 1,175 views
It is pretty common across most schools to find the grades at the MBA level divided between A’s and B’s. As such, you expect
1. 1 answer
2. asked by Mark
3. 1,174 views
Writeacher, I really need you to check these sentences and tell me which are possible. Thank you.1) I really hope we can start
1. 1 answer
2. asked by Matthew
3. 1,143 views
A factory produces fuses, which are packaged in boxes of 17. Three fuses are selected at random from each box for inspection.
1. 2 answers
2. asked by Emma
3. 1,140 views
what argument did johnson give for vetoing the civil rights bill of 1866
1. 1 answer
2. asked by Peaches
3. 1,122 views
Reposted:Use Hess's law to calculate the enthalpy change for the reaction: 3C(s) + 3H2(g) yield C3H6(g) Given the following
1. 1 answer
2. asked by Hailee
3. 1,105 views
365 people watched a show on monday,78 more people watched the show on tuesday.105 more people watched the show on tuesday than
1. 1 answer
2. asked by Nantha
3. 1,038 views
Hi,Please help me fix grammatical and any other mistakes in my writing. #1- So the story begin when a small aerobic prokaryote
1. 10 answers
2. asked by zee
3. 1,030 views
consider the function f(x)=x^3 - x^2 - 3x -2. find the average slope of this function on the interval (-2,3). by the mean value
1. 1 answer
2. asked by matt
3. 1,026 views
a triangle have lengths that are consecutive whole numbers and its perimeter is greater than 2008 cm.If the least possible
1. 1 answer
2. asked by Anonymous
3. 1,022 views
A car manufacturer has 96 cars to paint. Each batch of paint can paint 12 cars. Which equation can be used to find b, how many
1. 2 answers
2. asked by Mia
3. 1,000 views
Which of the following is an example of an innate UCS-UCR connection?sneezing in response to pepper a temper tantrum raising
1. 3 answers
2. asked by Venessa
3. 987 views
how does the number of electron pairs around a central atom determines its shape
1. 1 answer
2. asked by Doreen
3. 966 views
Write a slope-intercept equation of the line whose graph is desrcibed,parallel to the graph of 3x+2y=5;y-intercept(0,-1)
1. 1 answer
2. asked by sherry
3. 960 views
A turntable must spin at 33.7 rpm (3.53 rad/s) to play an old-fashioned vinyl record. How much torque must the motor deliver if
1. 1 answer
2. asked by Keith
3. 956 views
A ball of radius 0.211 m rolls along a horizontal table top with a constant linear speed of 3.41 m/s. The ball rolls off the
1. 1 answer
2. asked by Katie
3. 897 views
An air plane with
1. 1 answer
2. asked by badi
3. 880 views
A diver jumps off a 10m diving board with an initial upward velocity of 5.0 m/s. What is the diver's velocity after 1.5 seconds?
1. 1 answer
2. asked by Anthony
3. 875 views
A prism, made of glass of refractive index 1.50, has two plane faces at an angle 33 to each other. A ray of light enters the
1. 2 answers
2. asked by Barry
3. 854 views
A rectangular lot is surrounded by a rock wall 46 meters in length. What are the dimensions of the lot if its length is 5 meters
1. 1 answer
2. asked by Kassie
3. 836 views
A house painter stands 3 m above the ground on a 5.3-m-long ladder that leans against the wall at a point 4.7 m above the
1. 0 answers
2. asked by Keith
3. 833 views
by applying rolle's theorem, check whether it is possible that the function f(x) = x^5 + x -17 has two real roots. your reason
1. 0 answers
2. asked by don
3. 799 views
18.0 ml of 0.122 M diprotic acid was titrated with 0.1017 M NaOH. The acid ionization constants for the acid are Ka1 = 5.2*10^-5
1. 1 answer
2. asked by Nymei
3. 782 views
If HClO2 is a stronger acid than HF, which is stronger than HOCl, thenthe order of strengths of the conjugate bases of these
1. 1 answer
2. asked by bob
3. 781 views
A hydrocarbon gas contains 92.26% carbon and7.74% hydrogen, by mass. At one atmosphere pressure and 25°C, 4.20 L of the gas has
1. 1 answer
2. asked by harley
3. 762 views
A 0.6753 g sample of an unknown metal wasconverted to the nitrate, MCl2, then a solution of the nitrate was treated with silver
1. 1 answer
2. asked by harley
3. 762 views
A race car, starting from rest, travels around a circular turn of radius 20.8 m. At a certain instant, the car is still
1. 1 answer
2. asked by Katie
3. 752 views
x^2/x^2+3x-10 - 1/x^2+8x+15Simplify Leave in factored form and put () around polynomials
1. 1 answer
2. asked by Nancy
3. 752 views
Which salt below will dissolve in water to yield an acidic solution?a) NaNO2 b) K C§¤O4 c) NH4NO3 d) Na2CO3 e) Mg Br2 help!
1. 1 answer
2. asked by bob
3. 739 views
Doing an assignment on act 4 scene 1-2 of Romeo and Juliet's symbolsI have to use these symbols and find an object for each one
1. 3 answers
2. asked by Haley
3. 734 views
Laser light with a wavelength = 665 illuminates a pair of slits at normal incidence.What slit separation will produce
1. 1 answer
2. asked by Barry
3. 730 views
Find the x and y intercepts and graph the equation plotting the intercepts.Show work...-5x+8y=-40
1. 1 answer
2. asked by sherry
3. 727 views
Hi Dr. Bob,I am quite stumped on how to figure out when chemical equations have a REACTION or NO REACTION. I have read the
1. 1 answer
2. asked by Julie
3. 715 views
Bond valuation Callaghan Motors’ bonds have 10 years remaining to maturity. Interest is paid annually; they have a $1,000 par
1. 1 answer
2. asked by Sharon
3. 714 views
A lunch tray is being held in one hand, as the figure below illustrates.The mass of the tray itself is 0.182 kg, and its center
1. 0 answers
2. asked by Katie
3. 713 views
Which of the following is a Bronsted-Lowry base but not a Lewis base?a) H2O c) CN– e) all choices are both a B/L and Lewis
1. 1 answer
2. asked by bob
3. 712 views
Which of the following statements are incorrect?1) Gases are not included in the equilibrium constant expression. 2) Equilibrium
1. 2 answers
2. asked by David
3. 698 views
what distance formula would you use to solve this problem? A boat starts at point A, moves 3 km due north, then 2km due east,
1. 1 answer
2. asked by trey
3. 682 views
A neon sign is made of glass tubing with an insidediameter of 12.7 mm and length of 16.0 m. If the sign contains neon at a
1. 1 answer
2. asked by harley
3. 678 views
For the period 1500-1830, compare Nirth American racial ideologies and their effects on society with Latin American/Caribbean
1. 2 answers
2. asked by Kole
3. 670 views
Choose the equation that best represents an ellipse for the given foci and co-vertices. foci (+or- 3,0) co-vertices (o, + or- 6)
1. 2 answers
2. asked by bree
3. 650 views
A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic
1. 1 answer
2. asked by Angela
3. 633 views
For the following reaction, the equilibrium constant Kc = 97.0 at 900K. If the initial concentrations of NH3 and H2S are both
1. 1 answer
2. asked by David
3. 627 views
which of the following chemical substances would you expect to exhibit the greatest degree of hydrogen bonding?A. ethanol
1. 1 answer
2. asked by jessica
3. 613 views
If you are calculating surface area of a right circular cone topped with a hemisphere. the radius is 4 cm and the rt angle is 8
1. 1 answer
2. asked by trey
3. 608 views
Without consultation, each of four organizations announces a one-day convention to be held during July. Find the probability
1. 0 answers
2. asked by Emma
3. 608 views
Calculate whether or not a precipitate will form if 1.30 mL of 0.80 M NH3 are added to 2.2 L of 1.0 10-3 M FeSO4. Calculate Q.
1. 1 answer
2. asked by Tanya
3. 606 views
evaluate the function f(r)= sqrt25-r-6 at the given values of independent variables f(16), f(-x), f(25-2x) and simplify
1. 1 answer
2. asked by Melanie
3. 605 views
In a certain manufacturing process the probability of a type I defect is 0.21, the probability of a type II defect is 0.31, and
1. 1 answer
2. asked by Emma
3. 604 views
In a classroom of children (10 boys and 8 girls), six students are chosen to go to the blackboard. What is the probability that
1. 1 answer
2. asked by Emma
3. 598 views
What is the role of promoter in lac operon?
1. 0 answers
2. asked by John
3. 589 views
A spinning flywheel has rotational inertia I = 401.9 kg · m2. Its angular velocity decreases from 20.5 rad/s to zero in 257.1 s
1. 1 answer
2. asked by Keith
3. 580 views
Given the linear equation y=-4/3x+1,find the y-coordinates of the points (-6),(-3) and (6).Show work.Plot these points and graph
1. 1 answer
2. asked by sherry
3. 577 views
Predicting Home Prices Selling prices of homescan depend on several factors such as size and age. The accompanying table shows
1. 0 answers
2. asked by Lulu
3. 577 views
How do i write this in French with all correct conjugations?if someone could rewrite this in French with all the proper tences
1. 2 answers
2. asked by Needhelp
3. 568 views
What geometric figure does a regular polygon begin to resemble as the number of sides increases? How come the answer is a
1. 2 answers
2. asked by Anonymous
3. 561 views
at a playground, the ratio of boys to girls was 5:6. if 2 over 5 of the boys and 1 over 2 of the girls left, there were 54
1. 2 answers
2. asked by Anonymous
3. 555 views
The equilibrium constant Kp for the following reaction is 4 atm^2 at 300 K.AB(s) = A(g) + B(g) What is the equilibrium pressure
1. 1 answer
2. asked by David
3. 555 views
An object is thrown upward at a certain angle above the ground, eventually returning to erth.1.Is there any place along the
1. 1 answer
2. asked by badi
3. 554 views
Could you please check these other sentences? They are the last on the same topics. Thank you.1)You can't get around it: you
1. 1 answer
2. asked by Matthew
3. 548 views
The subject of this unit is the role of those mythologies which determine the meaning of being male or female in American
1. 3 answers
2. asked by Katie
3. 540 views
So I'm doing a paper regarding the industrial revolution and the working class.. I need your opinion with regards to the idea
1. 2 answers
2. asked by jamie
3. 539 views
The following objects are released from rest and allowed to roll down an inclined plane. Rank the objects by the order of which
1. 1 answer
2. asked by Katie
3. 538 views
Given the linear equation y=-4/3x+1,find the y-coordinates of the points (-6),(-3) and (6).Show work.Plot these points and graph
1. 1 answer
2. asked by sherry
3. 525 views

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