# If the relative atomic mass of CH2O is calculated it's empirical formula (C=12,H=1,O=16)

46,086 questions, page 446

An Astronut is working in space station when he notices that his safety rope tying him to the station has come undone. He is 5.00 meters away and drifting further away at 0.100 m/s. Fortunately he is holding a 1.00 kg hammer as well as a 15.00 kg antenna

asked by Miso on April 25, 2012
2. ## Physics

1. What is the best way to determine levelness? Plot Position versus Time and compare the linear fit from each direction of travel; slopes should be equal. See if the Acceleration versus Time for both directions are both zero. Plot the Acceleration versus

asked by Sandhya on March 27, 2008
3. ## SAT Practice Essay

Think carefully about the issue presented in the following excerpt and the assignment below. In many circumstances, optimism—the expectation that one's ideas and plans will always turn out for the best—is unwarranted. In these situations what is needed

asked by Sahil on November 23, 2008
4. ## Health

3. Which is not a health professional who treats mental and emotional disorders? A psychiatrist B neurologist C social worker D psychologist 4. Arachnophobia, the fear of spiders, is an example of a(n) A. Personally disorder B. Anxiety disorder C. Mood

asked by Iloveyou on November 1, 2016
5. ## science PLZ HELP

electric charges that are different A) attract each other B) repel each other C) exist in pairs D) do not interact Magnetic field lines around a bar magnet A) are only perpendicular to the magnet B) spread out from one pole and curve around the other C)

asked by Anonymous on March 31, 2015
6. ## English12 (EssayCheck Part 2)

I know I posted this but, I need suggestions on my essay. I'm going to break this into parts so it doesn't look so long make it easier. Please give me any feedback. I just want to know what you think about it. Don't worry about grammar errors for now. I

asked by NeedHelp on December 3, 2011
7. ## Chemistry

Earth's oceans have an average depth of 3800 m, a total area of 3.63 108 km2, and an average concentration of dissolved gold of 5.8 10-9 g/L. (a) How many grams of gold are in the oceans? (b) How many cubic meters of gold are in the oceans? Assuming the

asked by Anonymous on August 25, 2013
8. ## Physics C: Mechanics

A yo-yo has a rotational inertia of 760 g·cm2 and a mass of 200 g. Its axle radius is 4.0 mm, and its string is 100 cm long. The yo-yo rolls from rest down to the end of the string. (a) What is the magnitude of its linear acceleration? cm/s2 (b) How long

asked by Xavier Hernandez on October 26, 2010
9. ## AP Chemistry

This is the question I am having trouble with: A voltaic cell consists of a strip of lead metal in a solution of Pb(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution, with Cl2 gas bubbled around the electrode.

asked by Sarah on April 20, 2015
10. ## U.S. History

How did the influx of immigrants affect cities? A: The influx of immigrants led architects to develop new approaches to housing and transporting large numbers of people. This resulted in the development of skyscrapers, horsecars, cable cars, and electric

asked by Victoria on October 7, 2015
11. ## Chemistry

13. Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? 2Na + 2H2O = 2NaOH + H2 So far I have this much figured out: Mass to

asked by Mitch n' Joey on December 12, 2017
12. ## CHM Lab

Calibration of a 50 ml buret (10 ml,15 ml,20ml, 25 ml,30ml,35ml,40ml,45ml,50ml)(repeated the procedure 3 times) for experimental ; i have observed vol(ml) , temp.C ,for true i have mass(g), true vol. ml and for calibration i found error ml /correction

asked by Jesi on September 17, 2014
13. ## physics

Pleaseee help explain how to draw the free body diagrams for this problem!!! Two blocks with masses m1 = 10.9 kg and m2 = 79.3 kg, shown in the figure (in the figure the 79.3kg block(m2) is on a flat surface, the 10.9kg(m1) block is pinned against the

asked by dave on November 9, 2011
14. ## Physics

Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. When the drive force is shut off, the snowmobile coasts to a halt. The snowmobile and its rider have a mass of 136 kg. Under the

asked by jim on October 24, 2012
15. ## Physics

Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. When the drive force is shut off, the snowmobile coasts to a halt. The snowmobile and its rider have a mass of 136 kg. Under the

asked by Kane on October 21, 2012
16. ## physics

A car P is moving with uniform speed of 5m/s towards a carriage of mass 9kg at rest kept on the rails at point B. the height of AC is 120m.cannon balls of 1kg are fired from the car with an initial velocity of 100m/s at an angle 30 degree with the

asked by sreeram on January 16, 2011
17. ## Chemistry

I need to take some following samples of these: *a hydrocarbon w/a molecular mass greater than 100 g/mo *something w/ L-carvone or D-carvone in it *a non-electrolyte that dissloves in water *something w/a pressure greater than 2.o atom *a proton donor can

asked by VaNeSsA on February 4, 2007
18. ## physics

1. When material decays, it emits a particle. An experiment similar to the J.J. Thomson experiment is performed to determine the charge-to-mass ratio of this particle. It is found that the particle moves undeflected through mutually perpendicular magnetic

asked by sam on September 9, 2013
19. ## Physics (help steve)

A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in

asked by Kay on July 9, 2013
20. ## chemistry

Water softeners often replace calcium ions in hard water with sodium ions. Since sodium compounds are soluble, the presence of sodium ions in water does not cause the white, scaly residues caused by calcium ions. However, calcium is more beneficial to

asked by M on January 25, 2010
21. ## Physics - ice to liquid

Fifty grams of hot water at 80oC is poured into a cavity in a very large block of ice at 0oC. The final temperature of the water in the cavity is then 0oC. Show that the mass of ice that melts is 50 g. To melt ice to 50g of water, I think that it will

asked by Ceres on September 24, 2009
22. ## Complex Physics Problem

A ladder can fall for two reasons. If it is set too steep and climber gets their mass to the left of the ladder's base, the ladder likely will fall over backwards. If the ladder is set at too shallow of an angle the required force of friction between the

asked by Devin on June 29, 2013
23. ## Physics

1. A 5 kg weight is hung from a vertical spring. The spring stretches by 5 cm. How much mass should be hung from the spring so it will stretch by 10 cm from its original length? A. 15 kg B. 10 kg C. 20 kg D. 25 kg 2. What is the spring constant of a spring

asked by Amber on March 4, 2019
24. ## Chemistry

1. The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrofluoric acid. F2(g) + NH3(g) „³ N2F4(g) + HF(g) a. If you have 66.5g NH3, how many grams of F2 are required for complete reaction? b. How many grams of NH3 are required

asked by Sulon on March 26, 2011
25. ## fizik

Two shuffleboard disks of equal mass, one orange and the other yellow are involved in a perfectly elastic glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving initially to the right at 7.00 ms"1. After the

asked by alya on April 11, 2011
26. ## chemistry

I think, by convention, most would consider the solvent as the major component and the others as solutes. Actually, however, it dosesn't matter. I just read that when one liquid is dissolved in another, the minor component is usually considered the solute

asked by DrBob222 on February 28, 2007
27. ## Physics

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. Hint: At three earth radii from the surface of the Earth, the gravity force (weight) of the spacecraft will be reduced to (1/4)^2 =

asked by Scotty on January 7, 2007
28. ## physics

steam at 100 degree C is passed into a container of negligible heat capacity containing 20 g of ice and 100 g of water at 0 degree C, until the ice is completely melted. Determine the total mass of water in the container. ( specific latent

asked by Anita Iwu on February 11, 2016
29. ## physics

A skier of mass 70kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8m/s^2. How much work is required to pull him 60m up a 30.7º slope (frictionless) at a constant speed of 3 m/s? answer in units of kJ. In this question, I

asked by puff puff on September 17, 2006
30. ## Social Studies

“In 1860, after a tenement fire took 20 lives, New York City's building laws were extensively revised and strengthened. At that time, the position of "Superintendent of Buildings" was created within the Fire Department to enforce the new structural

asked by rideon on April 6, 2017
31. ## Physics

A cannon is rigidly attached to a carriage,which can move along horizontal rails but is connected to a post by a large spring, initially unstretched, of force constant 60000 N/m. The cannon ﬁres a 305 kg projectile at a velocity of 174 m/s directed

asked by amanda and leah on January 29, 2012
32. ## SAT Essay

REFORMATTED Think carefully about the issue presented in the following excerpt and the assignment below. In many circumstances, optimism—the expectation that one's ideas and plans will always turn out for the best—is unwarranted. In these situations

asked by Sahil on November 27, 2008
33. ## physics

A yo-yo has a rotational inertia of 860 g·cm2 and a mass of 150 g. Its axle radius is 3.4 mm, and its string is 90 cm long. The yo-yo rolls from rest down to the end of the string. (a) What is the magnitude of its linear acceleration? 1 cm/s2 (b) How long

asked by Joey on January 5, 2011

5. A 1,600 kg car is moving south at 24 m/s. What is its momentum? (Points : 1) 66 kgm/s south 66 kgm/s north 38,000 kgm/s north 38,000 kgm/s south Question 6. 6. The velocity of a 150 kg cart changes from 6.0 m/s to 14.0 m/s. What is the magnitude of the

asked by Anon on January 27, 2014
35. ## Chemistry

A 205 mg sample of a diprotic acid is dissolved in enough water to make 250.0 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hydroxide (Ksp= 1.3 x 10-6) is prepared by adding excess calcium hydroxide to water and then

asked by Summer on February 25, 2013
36. ## Chem HW!! Difficult! HELP!

Urea (H2NCONH2) is used extensively as a nitrogen source in fertilizers. It is produced commercially from the reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g) ---Heat pressure---> H2NCONH2(s) + H2O(g) Ammonia gas at 223°C and 90. atm flows into a

asked by Jane on April 5, 2013
37. ## Physics!!

A cart loaded with bricks has a total mass of 25.2 kg and is pulled at constant speed by a rope. The rope is inclined at 21.6 ◦ above the horizontal and the cart moves 13.7 m on a horizontal floor. The coefficient of kinetic friction between ground and

asked by Bob on May 8, 2012
38. ## Physics - pls help

A heavy conductor (mass m, length `, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field ~B is now imposed. The acceleration of gravity is 9.8

asked by cr on April 14, 2011
39. ## Introductory Chemistry

Calcium chloride is 36.11% calcium by mass. How many grams of calcium are in 40.0 grams of calcium chloride

asked by Lisa on October 15, 2014
40. ## PHYSICS

PARTS C AND D ARE WHAT I'M HAVING TROUBLE WITH. a tobaggan of mass 20kg is dragged horizontally across snow by someone who exerts a force of 45N. the tobaggan travels 8m under the action of the force and has a final speed of 2.6 m/s. a)calculate the actual

asked by Sarah N H on January 30, 2010
41. ## Physics

A 2.5 kg block sits on an inclined plane with a 30 degree inclination. A light cord attached to the block passes up over a light frictionless pulley at the top of the plane and is tied to a second 2.5 kg mass freely hanging vertically. The coefficients of

asked by Margaret on October 11, 2013
42. ## physics

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k

asked by Anonymous on October 14, 2013
43. ## Physics

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k

asked by Anonymous on October 14, 2013
44. ## physics

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k

asked by ss01 on October 15, 2013
45. ## PHYSICS (HELP)

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k

asked by Anonymous on October 14, 2013
46. ## Geometry

In what direction must a plane head if it can maintain 350 km/h in still air, wishes to fly 500km in a diirection 040degree and the wind is blowing at 56km/h from 100 degree? howlong would the journey take(to the nearest minutes)? how long would the return

asked by Pauline on March 30, 2007

Spectroscopic studies have shown that the fusion reaction in the sun's core proceeds by a complicated mechanism. One proposed overall equation for the solar fusion reaction is 411H+2 0−1e→42He which is also accompanied by the release of "massless"

asked by sarah on March 8, 2015
48. ## physics

A circular blade on a radial arm saw is turning at 257 rad/s at the instant the motor is turned off. In 17.0 s the speed of the blade is reduced to 90 rad/s. Assume the blade to be a uniform solid disk of radius 0.170 m and mass 0.400 kg. Find the net

asked by Jeannine on June 4, 2007
49. ## Physics

Hockey puck A initially travels at  v(initial) = 6.2 m/s in the horizontal direction (East) on a smooth horizontal ice before striking hockey puck B which is initially at rest, off-center.  After the collision, A is deflected at Î¸ =  23 degrees

asked by AH on October 25, 2012
50. ## Astronomy

A cinder block can be weightless in space. Would you want to kick it with your bare foot? Even If it is weightless, does it have mass? An astronaut, circling the earth in the Space Shuttle, senses that his apparent weight is zero. He cannot feel the normal

asked by Sunny on April 10, 2007
51. ## Physics

One ball has 7 times the mass and twice the speed of another. 1. How does the momentum of the more massive ball compare to the momentum of the less massive one? Find the ratio of the momenta. 2. How does the kinetic energy of the more massive ball compare

asked by Mike on June 18, 2016

What is the molar solubility of barium phosphate in a 0.282M barium acetate solution? If I set up and ice table I would have 0.282M - X = ? Would I use the molar mass of barium acetate to complete the equation to find X? Ba3(PO4)2 ==> 3Ba^2+ + 2PO4^3-

asked by Hannah on April 28, 2012
53. ## chemistry

if 10.3 lithium sulfate react with an abundant amount of potassium phosphate, what mass of lithium phosphate can you expect to isolate? lithium sulfate to lithium phosphate : 10.03 x 3 li3PO4 x 115.79 Lipo4 / 109.94 liSo4 / 3 LiSo4 = 10.9016179159

asked by Boberto on January 28, 2016
54. ## physics

While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each

asked by Justin on July 26, 2013
55. ## physics

While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each

asked by Justin on July 28, 2013
56. ## Chemistry

1. Ca(OH)2(aq) + H3PO4(aq) à Ca3(PO4)2(aq) + H2O(l) a. If you have 13.7mol of Ca(OH)2, how many grams of H2O are produced? b. How many grams of H3PO4 are required to produce 102.3g Ca3(PO4)2? c. How many moles of Ca(OH)2 are needed to produce 82.9g of

asked by Sulon on March 26, 2011
57. ## Physics 1111: Orbitals and Distance

A planet has two satellite moons. Moon X has an orbital period of 2.27 days. Moon Y has an orbital period of about 3.40 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center.

asked by Sar on March 8, 2010
58. ## physics

Boxing gloves are padded to lessen the force of a blow. (a) Calculate the force exerted by a boxing glove on an opponent's face, if the glove and face compress 7.00 cm during a blow in which the 8.00 kg arm and glove are brought to rest from an initial

asked by Amelia on April 10, 2012
59. ## new Q science

Give an example of how you've seen the law of conservation of matter in action today. Since we don't know what "you've seen," it is impossible to answer this question. You need to review the law of conservation of matter in your textbook to compare your

asked by Lisa on March 28, 2007
60. ## physics

A railroad car rolling along by itself is passing by a grain elevator, which is dumping grain into it at a constant rate. (a) Does momentum conservation imply that the railroad car should be slowing down as it passes the grain elevator? Assume that the

asked by Sandhya on March 19, 2010
61. ## physics

You are a Middle Ages cannonball scientist attacking a castle a distance D away. Your job is to get a cannonball of mass m over the walls, which are a height H above the top of the cannonball launcher. At the instant when the cannonball leaves the launcher

asked by Henry on January 26, 2014
62. ## would someone please check this math

1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple

asked by larry on February 8, 2007
63. ## CIS/105

Hello I need help with my upcoming finals project here is what I have to do: Use information and data obtained from at least four reliable Internet sources to produce a 12- to 15-slide PowerPoint® presentation about multimedia tools that aid classroom

asked by Kala on February 13, 2014
64. ## Earth Science (check answers)

1. The mass number of an atom is obtained by totaling the number of_____and____. a. electrons and protons b. electron and neutrons c.protons and neutrons d.neutrons and isotopes Is it B? 2. Which of the following statements about the chemical combinations

asked by Ember Lovet on August 8, 2017
65. ## Thermodynamics

Steam in a cylinder-piston arrangement expands from an initial condition of 5 bar, 80% dry to a final state of 2 bar, dry saturated steam. The initial volume of steam is 0.8 m3. The process of expansion can be represented by a straight line on the

asked by Phy on October 17, 2014
66. ## science

Concentrated sulfuric acid (18.4 molar H2SO4) has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar, the solution has a density of 1.38 grams per milliliter and can be used as an electrolyte in lead storage batteries for

asked by raksha on October 24, 2007
67. ## chemistry

Hi you guys please help me with my chemistry homework, i need to find all these items and take them to my class in a ziploc bag *a hydrocarbon with a molecular mass greater than 100g/mol *2 porpanol *an aromatic compound(not the common usage of "aromatic"

asked by desperate on February 4, 2007

A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in

asked by Steve on July 13, 2013
69. ## SCIENCE,PHYSICS

A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in

asked by GT on July 10, 2013
70. ## help physics

A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in

asked by Steve on July 14, 2013
71. ## Physics

3.A car with a mass of 1500 kg is parked on a hill with an incline of 20°. a.What is the weight of the car? b.What is the normal force the car experiences? (hint: balance the forces parallel and perpendicular to the hill using Newton’s second law)

asked by Hunter on June 20, 2011
72. ## Physics

I have no idea of how to solve this problem. Please help. lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.200 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg

asked by Jim on March 22, 2007
73. ## Physics

Superman rushes to save Lois Lane, who has fallen (has been pushed?) from a window 120 m above a crowded street. Superman swoops down in the nick of time, arriving when Lois is 2.0 m above the street and stopping her just at ground level. Lois has a mass

74. ## phy

(Q1)At what altitude above the earth's surface would the acceleration due to gravity be 4.9m/s-2?Assuming the mean radius of the earth is 64000000meters and the acceleration due to gravity 9.8m/s-2 on the surface of the earth

asked by ikye on July 5, 2013
75. ## chemistry

Ammonium bisulfide, NH2HS, forms ammonia NH3, and hydrogen sulfide, H2S through the reaction: NH4HS (s) NH3(g) + H2S(g) Kp value of .120 at 25C in a 5L flask is charged with .300g of H2S at 25C. A) What are the partial pressures of NH3 and H2S at

asked by maura on March 11, 2012
76. ## CHEM

A cylinder with a movable piston contains 2.00g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the

asked by K on October 28, 2007
77. ## chemistry

530 mL solution 10% HCl has been spilt onto the bench. It cannot be diluted or washed away. How much of the granular NaOH from the container seen in a must be used to neutralise the acid? [Using NaOH: MM = 40 g/mol] 1. I have NaOH + HCl --> NaCl + H2O. 10%

asked by Anonymous on October 2, 2014
78. ## Chemistry

Potassium superoxide, KO2, is used for producing oxygen and removing carbon dioxide in selfcontained breathing units, space shuttles, and other enclosed spaces. First the potassium superoxide reacts with moisture to release oxygen and produce potassium

asked by Dean on October 10, 2017
79. ## Science

Hi, I am working on stoichiometry and limiting reactant problems. I have worked through examples in my book and I did them right and can solve for the excess, however there is one problem in the book that has confused me. I don't understand why they

asked by Alexa on March 12, 2014
80. ## Physics

I did a lab about Standing waves on a string and it asked me the following qeuestions: Discuss any errors arising from the method used to establish the standing wave pattern. - I think air resistance, linear density of string is non uniform, tension of the

asked by Anna on June 5, 2015
81. ## Physics

The ski slopes at Bluebird Mountain make use of tow ropes to transport snowboarders and skiers to the summit of the hill. One of the tow ropes is powered by a 22-kW motor which pulls skiers along an icy incline of 14° at a constant speed. Suppose that 18

asked by Honey on April 4, 2013
82. ## Physics

A large kite of mass 3 kg is flying through the air on a windy day. Currently, the tension from the string on the kite has a magnitude of 7.7 N at an angle of θ = 33.5 degrees. The current acceleration of the kite has a magnitude of a = 7.56 m/s2 at an

asked by Ashley on September 16, 2012
83. ## chemistry

write the equation for copper(II) sulfate pentahydrate and ammonium sulfate forming: Cu(NH4)2(SO4)2*6H2O not sure how to balance it Check your question very carefully. Is this a question given to you by a teacher? yeah it is in a lab CuSO4.5H2O + (NH4)2SO4

asked by harry on November 6, 2006
84. ## Chemistry

I have a certain concentration of NaCl (in mg/L). I have to convert it to ppm Na+. I read some of the previous posts, and I understand that if I don't know the density, I should assume that 1ppm = 1mg/L. Does this also apply to ppm Na+ since there is 1 Na+

asked by Maggie on February 20, 2007
85. ## Physics

Rubber Band A 156 g hockey puck is attached to a rubber band and rotated with an angular speed of 9.8 rad/s on frictionless horizontal ice. It takes a force of 1.12 N to stretch the rubber band by 1 cm. (a) If the original length L of the rubber band is 1

asked by Help on December 3, 2010
86. ## AP Physics

A block and a spool have the same mass, and are each pulled across a level, frictionless surface by a string, as shown to the right. The string pulling the spool is wrapped around it many times, and the other string is fastened to the center of the block.

asked by Anonymous on March 15, 2017
87. ## Physics

A block and a spool have the same mass, and are each pulled across a level, frictionless surface by a string, as shown to the right. The string pulling the spool is wrapped around it many times, and the other string is fastened to the center of the block.

asked by Anonymous on March 15, 2017
88. ## Chemistry

Hi everyone, I have been trying to figure out this titration equation all day and for some reason I am stumped. Here is the question in full: Potassium hydrogen phthalate, KHP, can be obtained in high purity and is used to determine the concentrations of

asked by jo on November 29, 2012
89. ## Physics

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k

asked by asha on October 10, 2013
90. ## Physics

The Earth has an angular speed of 7.272·10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 3.45·1022 kg) hits the Earth while traveling at a speed of 4.41·103 m/s (assume the asteroid is a point mass compared to the radius of the

asked by Joe Frank on November 8, 2012
91. ## physics

A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.596 rev/s. A 59.4 kg person running tangential to the rim of the merry-go-round at 3.68 m/s jumps onto its rim and holds on. Before jumping on the

asked by PHYChica on June 6, 2007
92. ## physics

An object with a mass of 3.4 kg is originally at rest on a horizontal, frictionless surface frictionless which is at the top of a frictionless incline with a length of 6 meters which is inclined at 28.9 degrees. Someone's hand applies a force to the object

asked by Chelsea on October 31, 2012
93. ## physics

A .22 rifle bullet traveling at 360m/s strikes a block of wood, which penetrates to a depth of .110m. The mass of the bullet is 1.80g. Assume a constant retarding force.A) how much time is required for the bullet to stop? b) what force in newtons soes the

asked by Chris on November 16, 2006
94. ## Math

How do I figure the ratio of one part liquid to eighteen parts water if I am using four gallons of water? Isn't the water liquid also? So all eighteen parts are liquid. 17 parts water= 17/18*4gal= 17/18*16quarts= ... 1 part solute= 1/18*16 quarts= 3.5 cups

asked by Greg on July 21, 2007
95. ## physics

A large uniform block rests horizontally on two vertical supports(one support at the left end of the block and another at a distance from the other end) and has a weight hanging from its other end. The block has a mass of 100 kg and a length of 2 meters.

asked by sandhya on October 16, 2010

1(a)Let Y have a binomial distribution with parameters n and p. We reject Ho: p=1/2 and accept H1: p>1/2 if Y>=c. Find n and c such that the probability of a Type I error is .10, and P(reject Ho/p=2/3)=.95. (b)What is the probability of a Type II error?

asked by John on May 10, 2010
97. ## College Physics

A child plays on a bungee cord and oscillates with a certain frequency f. An adult with a mass that is 16 times greater than that of the child then uses the same bungee cord. What is the ratio of the frequency with the adult to the frequency with the

asked by Anon on November 6, 2011
98. ## physics

A ladder can fall for two reasons. If it is set too steep and the climber gets their mass to the left of the ladder's base, the ladder likely will fall over backwards. If the ladder is set at too shallow of an angle the required force of friction between

asked by joe on March 31, 2014
99. ## Physics

An object m is released from the top of an inclined, frictionless plane that is inclined at angle theta with the horizontal. The top of the ramp has height h. Which of the following would change the acceleration of the object if it were released from the

asked by Bob Loblaw on October 30, 2012
100. ## PHYSICS

An astronaut of mass 78.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.500 m/s. With the

asked by EDDY on November 2, 2011