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Questions Asked on November 2, 2010

The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H
1. 5 answers
2. asked by Willy
3. 8,327 views
Michael Jordan was said to have a hang time of 3 seconds. Use kinematic equations to determine the height to which MJ could leap
1. 4 answers
2. asked by Lilly
3. 4,929 views
What volume of HCl gas is produced by the reaction of 2.4 liters of H2 gas with 1.5 liters of Cl2 gas? (Volumes are at the same
1. 1 answer
2. asked by Bob
3. 4,834 views
The observation deck of tall skyscraper 370 m above the street. Determine the time required for a penny to free fall from the
1. 4 answers
2. asked by CASS
3. 4,746 views
A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves
1. 3 answers
2. asked by Cassie
3. 4,733 views
4Al(s) + 3O2(g)2Al2O3(s)Delta H reaction = -3351.4 kJ How much energy is transferred when 42.6 g of aluminum reacts to form
1. 3 answers
2. asked by John
3. 3,316 views
In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.80 m/s relative to the ground. A
1. 7 answers
2. asked by bobjahng
3. 3,200 views
The circumference of a circle is approximately 28.26 cm. Find its diameter and radius
1. 9 answers
2. asked by Cynthia
3. 3,190 views
You place a test-tube of a room temperature reagent into a beaker of hot water. Which of the following statements are true?
1. 3 answers
2. asked by John
3. 3,098 views
Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 20 meter high platform into a shallow
1. 2 answers
2. asked by Lilly
3. 3,044 views
A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before
1. 1 answer
2. asked by Jordan
3. 2,881 views
The length of each side of a triangle is an even number. If no two of the sides are equal, what isthe smallest perimeter the
1. 3 answers
2. asked by dhiraj
3. 2,749 views
Determine between which consecutive integers one or more real zeros of f(x) = –x3 + 2x2 – x – 5 are located
1. 3 answers
2. asked by shayla
3. 2,644 views
The equation for synthesis of the poisonous gas COCl2 isCO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2
1. 2 answers
2. asked by Melissa
3. 2,492 views
Write the equilibrium constant expression for the reaction: 2NO +2H2 =N2+2H2OKc=?
1. 2 answers
2. asked by Stephany
3. 2,345 views
If 30 L of Oxygen are cooled from 200 degrees celsius to 1 degree celsius at constant pressure, what is the new volume of
1. 2 answers
2. asked by Heather
3. 2,287 views
A certain brand of iron suppluement contains FeSo4 7H20 with miscellaneous binders and fillers suppose 22.93 mL of KMnO4
1. 1 answer
2. asked by Anna
3. 2,236 views
If 0.2178 g of a diprotic solid acid is neutralized by 44.81 mL of 0.0953 M NaOH, calculate the molar mass of the solid acid
1. 1 answer
2. asked by Jake
3. 2,204 views
2 B5H9(l)+12 O2(g)---->5 B2O3(s)+9 H2O(l)Calculate the kilojoules of heat released per gram (kJ/g) of the compound reacted with
1. 1 answer
2. asked by W
3. 2,161 views
A woman runs a kilometer using a force of 210 N and a power output of 500 W. How long in minutes does it take this woman to
1. 2 answers
2. asked by Josh
3. 2,083 views
Indicate the effect that each of the following conditions will have on a company's average variable cost (AVC) and average total
1. 2 answers
2. asked by G
3. 1,979 views
1)If 36 mL of KMnO4 solution are required to oxidize 25 mL of 0.02932 M NaC204 solution, what is the concentration of the
1. 3 answers
2. asked by yipez
3. 1,887 views
If Michael Jordan has a vertical leap of 1.29 m, then what is his takeoff speed and his hang time?
1. 1 answer
2. asked by Catherine
3. 1,847 views
A 150-g block on the end of a spring with a spring constant of 35N/m is pulled aside 25 cmand released from rest. In the
1. 1 answer
2. asked by Anonymous
3. 1,840 views
DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)
1. 2 answers
2. asked by ISABEL
3. 1,756 views
The cariable x satisfies the equation 3^x.4^(2x+1)=6^(x+2).By taking logarithms of both sides,show that x=log9/log8
1. 2 answers
2. asked by Matteo
3. 1,729 views
What were the factors responsible for western europe's domination of world trade from 1650-1800?i have to know 2 economic
1. 7 answers
2. asked by Sally Sue
3. 1,643 views
balance the followig example of a heterogeneous equilibrium and write its reaction quotient, Qc:S8 + F2=SF6 i've balanced it i
1. 2 answers
2. asked by Stephany
3. 1,627 views
Which of the following statements most accurately characterizes immigrants' accommodation to city life in the United States
1. 2 answers
2. asked by John
3. 1,563 views
If you have red solution, at what wavelengths should it absorb light, at what wavelengths should it NOT absorb light?
1. 1 answer
2. asked by samantha
3. 1,522 views
CH3COOH + C5H12O -> C7H14O2 + H2OIf the yield for the reaction is 45%, how many grams of the product are formed when 3.58 g of
1. 1 answer
2. asked by David
3. 1,495 views
Calculate the change in heat for the reactionSO2 + 1/2O2 --> SO3
1. 1 answer
2. asked by Mary
3. 1,420 views
A piece of solid carbon dioxide, with a mass of 7.4 g, is placed in a 4.0-L otherwise empty container at 27°C.(a) What is the
1. 1 answer
2. asked by Mattie
3. 1,389 views
Smithson Corporation had a 1/1/10 balance in the Allowance for Doubtful Accounts of $10,000. During 2010, it wrote off $7,200 of
1. 1 answer
2. asked by Shamy
3. 1,366 views
Can someone please explain this question to me, i am not sure if i am right but i think the answer is 2?How many of the
1. 1 answer
2. asked by sam
3. 1,342 views
Use 6 digits from 1 through 7, each once, to make two 3-digit numbers whose sum is 670 and whose difference is 376. Give both
1. 3 answers
2. asked by Anonymous
3. 1,339 views
After 10.0 s, a spinning roulette wheel at a casino has slowed down to an angular velocity of +1.56 rad/s. During this time, the
1. 0 answers
2. asked by Danica
3. 1,309 views
To push a 25.0kg crate up a frictionless surface incline angled at 25 degrees to the horizontal, a worker exerts a force of
1. 1 answer
2. asked by Lyss
3. 1,293 views
Does anyone has questions (page 22) from pearson math makes sense grade 6 book? Please, help. I forgot my book at school and I
1. 2 answers
2. asked by Anonymous
3. 1,277 views
A lighthouse is built on an exposed reef, 5.5 miles off-shore. The shoreline is perfectly straight, and a town is located 6.5
1. 2 answers
2. asked by Anonymous
3. 1,219 views
Company A charges $55 per day plus $0.35 per mile to rent a car. Company B charges $50 per day plus $0.40 per mile. Jack wants
1. 5 answers
2. asked by CHANTELL
3. 1,214 views
if a thermometer contained a gram of mercury, how much would the volume of the mercury change when the temperature rose from 0
1. 2 answers
2. asked by james
3. 1,199 views
What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Explain why the
1. 1 answer
2. asked by Kathy
3. 1,195 views
Can you please let me know if the following exercises are correct? In particular, can you help me formulate the questions more
1. 1 answer
2. asked by Franco
3. 1,179 views
After the party, tell a friend who was in charge of each task. Use direct-object pronouns in your answers.¿Quién compró los
1. 2 answers
2. asked by AYUDA ME PORFAVOR!! :)
3. 1,173 views
In "There is no frigate like a book," the lines "Nor any coursers like a page/of prancing poetry" use meter to show
1. 4 answers
2. asked by ink
3. 1,164 views
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each transitions.?n=4 => n=3 ? v =
1. 2 answers
2. asked by AMY F
3. 1,164 views
I don't get how to do this. I'm so lost please help me.Determine the equation of the parabola with roots 2+√3 and 2-√3, and
1. 1 answer
2. asked by priya
3. 1,159 views
A single-engine airplane carries enough fuel for an 8-hour flight. After the airplane has been flying for 1 h, the fuel tank
1. 1 answer
2. asked by Heidi
3. 1,154 views
Find the product of (x^2 - 3x + 5) with the quotient of (10x^6 - 15x^5 - 5x^3) ÷ 5x^3.I need some help with this. I'm really
1. 3 answers
2. asked by Acezar
3. 1,143 views
A 12.0g bullet is accelerating from rest to a speed of 700m/s as it travels 20.0cm in a gun barrel. How large is it's
1. 1 answer
2. asked by Reema
3. 1,143 views
Write a balanced chemical reaction to show the reaction between ammonium and a chlorite?Is this correct? 2NH3 + CLO2 + H2O ⇒
1. 0 answers
2. asked by dan
3. 1,127 views
A novice skier, starting from rest, slides down a frictionless 35.0 degrees incline whose vertical height is 140 m.1. How fast
1. 1 answer
2. asked by Nick
3. 1,125 views
What would be the reaction between Mn2+ and NH3? is it Mn(NH3)? and would this solution react with HNO3, considering it would
1. 0 answers
2. asked by nicole
3. 1,102 views
how do seed banks preserve seeds for future generations?
1. 3 answers
2. asked by David
3. 1,092 views
Consider the following chemical equation.Na3PO4(aq) + Ca(OH)2(aq) → Ca3(PO4)2(s) + NaOH(aq) How many grams of calcium
1. 1 answer
2. asked by Anonymous
3. 1,080 views
Use principles of force and kinematics to answer these:a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they
1. 0 answers
2. asked by jen
3. 1,073 views
Why are so many niches available on recently devastated islands such as Galapago's island?
1. 2 answers
2. asked by Dj Murray
3. 1,067 views
A 3.0 kg block is being pulled with a horizontal force of 29.7 N. If the block is accelerating at 3.2 m/s/s, what is the
1. 0 answers
2. asked by keith
3. 1,044 views
A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole)Calculate the gas
1. 1 answer
2. asked by ally
3. 1,034 views
i need help setting it up to find the answers. (answers included)two masses are connected together by a string which is then
1. 1 answer
2. asked by danielle
3. 1,019 views
true or false1 to the negative fifth power=(-1) fifth power
1. 4 answers
2. asked by Bryan
3. 997 views
In a game of pool, the cue ball strikes another ball of the same mass and initially at rest. After the collision, the cue ball
1. 1 answer
2. asked by Vipre
3. 992 views
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How long was
1. 0 answers
2. asked by Coby
3. 983 views
A tank is 180cm long, 90cm deep and 90cm wide at the top, tapering to 30cm wide at the base. If the tank is completely filled
1. 2 answers
2. asked by Claire
3. 977 views
Joe Nautilus has $120,000 and wants to retire. What return must his money earn so he may receive annual benefits of $20,000 for
1. 0 answers
2. asked by Ann
3. 972 views
if bisector of any angle of triangle bisects he opposite side then it is isoceles triangle
1. 1 answer
2. asked by abhiskar
3. 965 views
1. George W. Bush has called for an expansion in the role of __ in administering federal social programsa. colleges and
1. 5 answers
2. asked by Amy
3. 960 views
What is the approximate mass of air in a living room 6.0 m times 3.9 m times 2.7 m?
1. 2 answers
2. asked by emily
3. 945 views
factor x2-3x+4
1. 6 answers
2. asked by ariyonia
3. 945 views
i need to simplifys to the tenth power over s to the sixth power
1. 3 answers
2. asked by Bryan
3. 942 views
A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a
1. 1 answer
2. asked by jason
3. 940 views
It says, A plane travels 400 mi/h relative to the ground. There is a 25 mi/h wind blowing from the west to the east. Find the
1. 1 answer
2. asked by spandana siram
3. 905 views
IQ test scores are normally distributed with a mean of 97 and a standard deviation of 11.An individual's IQ score is found to be
1. 3 answers
2. asked by Rachel
3. 905 views
A student, crazed by final exams, uses a force P of magnitude 80 N to push a 4.0 kg block across the ceiling of his room. If the
1. 1 answer
2. asked by Lily
3. 901 views
can you help me unscramble these compound words?sbytb-ai,rliagotelsnkr-,vindr-ie,oc-lletnsfro,pa-ttiemr,tecaei-kds,vitfyin-een,r
1. 1 answer
2. asked by JW
3. 899 views
ifA(aq) + B(aq) = AB(aq), and the molarity of A in the solution is 0.60 M and the molarity of B in solution is 0.60M, calculate
1. 1 answer
2. asked by alex
3. 895 views
a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object
1. 0 answers
2. asked by juan
3. 881 views
How many mL of 0.25 M H2SO4 can be made from 50.0mL of 0.50 M H2SO4?Also in this case, what does the capital M stand fro?
1. 1 answer
2. asked by James
3. 876 views
¿Quién va a preparar la ensalada? Mirta y LidiaYour response: mirta y lidia las va a preparar 3.¿Quién va a cocinar la
1. 2 answers
2. asked by HELP
3. 873 views
A 13.0 mL sample of an unknown HClO4 solution requires titration with 25.2 mL of 0.180 M to reach the equivalence point.What is
1. 1 answer
2. asked by john
3. 871 views
Today, most psychologists take ____ approach to human development.a nativist an empiricist a dualist an interactionist
1. 7 answers
2. asked by erica
3. 855 views
What is poverty? Why is important to understand the different context in which poverty manifests itself? Its an essay question
1. 1 answer
2. asked by Gibbons
3. 851 views
Have 2 questions:1. Factor Trinomial competely x^2 + 8x + 53 (reads as x squared plus 8x plus 53) I am thinking it is prime. 2.
1. 3 answers
2. asked by Lynne
3. 841 views
A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot.a
1. 2 answers
2. asked by robin
3. 835 views
Why do you think employers don't want you to use social networking sites at work?What would be the consequence of dressing
1. 1 answer
2. asked by Anonymous
3. 832 views
You place a box with a mass of 20kg on an inclined plane that makes a 35.0° angle with the horizontal. What is the component of
1. 0 answers
2. asked by Johnaton
3. 830 views
A spring (70 {\rm N/m}) has an equilibrium length of 1.00 {\rm m}. The spring is compressed to a length of 0.50 {\rm m} and a
1. 0 answers
2. asked by Anonymous
3. 827 views
A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot.a
1. 1 answer
2. asked by robin
3. 823 views
4. If Britain and France had not adopted a policy of appeasement, would Adolf Hitler have been as successful as he was in
1. 2 answers
2. asked by mysterychicken
3. 822 views
A 0.25 kg ball is thrown straight up into the air with an initial speed of 20 m/s. Find the momentum of the ball at the
1. 1 answer
2. asked by Blair
3. 817 views
Prove: sin3x-sinx/cos3x-cosx=-cot2
1. 1 answer
2. asked by Dini
3. 799 views
You are given the following protein sequence: NH2-Met-Trp-Trp-Met-Trp-Met-COOH What was the sequence of the mRNA? You must write
1. 1 answer
2. asked by Dean
3. 794 views
1)If 36 mL of KMnO4 solution are required to oxidize 25 mL of 0.02932 M NaC204 solution, what is the concentration of the
1. 1 answer
2. asked by yipez
3. 794 views
For my pro side on the paper 'should the richer countries of the world help the poorer countries?'I have written about two pages
1. 1 answer
2. asked by y912f
3. 788 views
in triangle GHJ, k(2,3) is the midpoint of GH, l(4,1) is the midpoint of HJ and m(6,2) is the midpoint of GJ. Find the
1. 0 answers
2. asked by maria
3. 787 views
the dissociation of molecular iodine into iodine atoms is represented as: I2 =2I Suppose that .0256 mole of I2 was placed in a
1. 1 answer
2. asked by Claire
3. 784 views
Simtek currently pays a $2.50 dividend (D0) per share. Next year’s dividend is expected tobe $3 per share. Aft er next year,
1. 0 answers
2. asked by Linda Chapman
3. 784 views
A beam of microwaves with = 0.7 mm is incident upon a 12 cm slit. At a distance of 2 m from the slit, what is the approximate
1. 0 answers
2. asked by big
3. 784 views
The restriction enzyme BamHI recognises the sequence 5’-G^GATCC-3’, cleaving between the first and second G, as indicated.
1. 2 answers
2. asked by Arran
3. 782 views

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