# How many moles are there in a 30 cm diameter basketball at a pressure of 160 kpa and temperature of 25 degree celcius

22,676 questions, page 217
1. ## Calculus

Hello. I'm having problems with a couple of Calculus questions that involve maximums of geometric shapes. The first one is: 1. Find the dimensions and minimum volume of a right circular cone which can be circumscribed about a sphere of diameter 8. What I

asked by Alex on January 11, 2007
2. ## AP CHEMISTRY

The molar mass of an unknown organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates

asked by Someone on April 1, 2013
3. ## science

patrick and spongebob love to blow bubbles! patrick found some super bubble soap a sail-mart. the ads claim that supere bubble soap will produce bubbles that are twice as as bubbles made with regular bubble soap. patrick and spongebob made up two samples

asked by aliyaah on September 16, 2008
4. ## chemistry

A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300g instead of8.003g. The calculated molar mass of the unknown acid will be GREATER/LESS than true value b/c mass of

asked by christine on April 3, 2007
5. ## Chemistry

Posted on April 12. From the information below, identify element X. a. The wavelength of the radio waves sent by an FM station broadcasting at 97.1 MHz is 30.0 million (3.00 e7) times greater than the wavelength corresponding to the energy difference

asked by Gabriela on April 18, 2007
6. ## chem

Ammonium carbonate (solid) decomposes when heated to produce three gaseous products - ammonia, water, and carbon dioxide. 1. Write the balanced equation for the reaction. 2. Suppose that ammonium carbonate is heated to 500 K in a sealed vessel. At

asked by jake on May 13, 2010
7. ## college chem

Ammonium carbonate (solid) decomposes when heated to produce three gaseous products - ammonia, water, and carbon dioxide. 1. Write the balanced equation for the reaction. 2. Suppose that ammonium carbonate is heated to 500 K in a sealed vessel. At

asked by jake on May 18, 2010
8. ## Lang. Arts

2. Read the following excerpt from “Signed, Sealed, Undelivered.” Writing letters that will never be read frees you to say anything at all. You can write to those people whose petty meanness stung you or whose significant cruelties really hurt you.

asked by Jman on October 30, 2012
9. ## Math

A rectangular prism has a length of 100 cm, a height of 10 cm and a width of 5 cm. What is the volume of the rectangular prism? A. 3100 square centimeters B. 1550 square centimeters C. 5000 square centimeters D. 1200 square centimeters 2. A cylinder has a

10. ## Chemistry

A 35.00 mL sample of water at 30.0°C is placed in an open container with an external pressure of 1.00 atm. 30.0 kJ of heat is added to the water sample. The density of water is 1 g/mL. (a) How many grams of liquid water remain at the end of the process?

asked by N on February 11, 2015
11. ## essay novel study need ideas and advice

Jane Austen's novels Pride and prejudice and Persuasion both illustrate the challenges of being a woman in the 1900s. The need to find security, obtain wealth, status and marriage becomes necessary for survival and fulfillment. Unfortunatly, Austen shows

asked by cin on November 7, 2008
12. ## English

On Monday, July 30, basketball superstar LeBron James was on his way to the first day of school. This was not just any school, though. He was going to a school he helped start in his hometown of Akron, Ohio. This brought back feelings he had as a kid. He

asked by Barry Vacker on February 7, 2019
13. ## chemistry - Can you please check

Calculate the amount (g) of each of the following salts that need to be added to a 200 mL volumetric flask to produce a 2 M solution of S. CaSO4 (NH4)2SO4 Fe2(SO4)3 Dr. BOB222, Could you please check the following? Thank you. CaSO4: moles x atomic mass =

asked by Sejul on January 23, 2013
14. ## AP CHEMISTRY

The molar mass of an unknows organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates

asked by Ash on March 29, 2013
15. ## Chemistry

The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are 100 mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 degrees Celsius over a solution of ethanol in 1-propanol, in

asked by Arnold on March 18, 2010
16. ## math, word problem

How do I write the equation for this problem in order to solve it.I can solve it as long as someone shows me how to get the equation. (1)Science. Solve the following application. Jose rode his trail bike for 10miles. Two-thirds of the distance was over a

asked by Jasmine on December 5, 2006
17. ## thermodyn. please check work

What is the sign of heat(Q), Work(W), or Temperature for these following situations. Say if it's +,-, or 0. 1)You hit a nail with a hammer: +W, Q=0, T=0 2)You hold a nail over a Bunsen burner: Q=+Q, Temp:constant, W=0 3)You compress the air in a bicycle

asked by Anonymous on August 15, 2009
18. ## chemistry

The figure shows a cube of air at pressure 1.0 atm above a hot surface on Earth. Contact with the hot surface causes the volume of the air to expand from 2.00 × 105 L to 2.20 × 105 L by the transfer of 8.2 × 106 J of heat. Assume the systems are

asked by Morgan on January 31, 2015
19. ## Chemistry

How many kcal of heat energy are required or released when 1.73 moles of butanol , C4H9OH, is warmed from -175.8 degrees F to 360.9 degrees F? The following information concerning butanol applies: normal melting point: 12.5 degrees C normal boiling point:

asked by Garret on September 30, 2007
20. ## physics

Animals in cold climates often depend on two layers of insulation: a layer of body fat [of thermal conductivity 0.200 W/mK] surrounded by a layer of air trapped inside fur or down. We can model a black bear (Ursus americanus) as a sphere 1.50 m in diameter

asked by AE on December 2, 2009
21. ## AP Chemistry

A 5 gram sample of a gaseous substance occupies 10 L at 48◦C and 697 torr. What is the density of the gas under these conditions? Answer in units of g/L I first started converting the temperature to Kelvin, and the pressure to ATM. I then re-arranged the

asked by Jason on November 13, 2017
22. ## chemistry

The concentration of calcium ions in hard water can be determined by titration with reagent X,which forms a complex with Ca2+(aq), giving a change of color. Three moles of X combine with one mole of Ca2+(aq). Since the color change in this titration is

asked by Anonymous on March 3, 2012
23. ## Precalc

okay sorry last two questions! I promise! The sun always illuminates half of the moon’s surface, except during a lunar eclipse. The illuminated portion of the moon visible from Earth varies as it revolves around Earth resulting in the phases of the moon.

asked by anna on August 5, 2011
24. ## math

1.A wind turbine has blades 50m in diameter and an overall height of 125m. If it has four blades instead of three, create four equations modelling the height of a point on the tip for each of the four blades. 2.Create a sine equation for the height of a

asked by josh on April 25, 2016
25. ## Chem Check

Can someone verify my answers please? convert the folowing into a pressure reading expressed in torr A. 1.25atm * 760torr/1.0atm = 950. torr B. 2.48 x 10^-3 atm * 760torr/1.0atm = 1.88 torr C. 4.75 x 10^4 atm* 760torr/1.0atm = 3.61 x 10^7 torr D. 7.60 x

asked by Chopsticks on March 17, 2009

In the following statement, a business owner attempts to explain and justify his slow growth in his business. I limit my growth pace and every effort to service my present customers in the manner they deserve. I have some peer pressure to do otherwise by

asked by Gary on June 6, 2013
27. ## chemistry

One of the steps in the Ostwald process for the production of nitric acid involves oxidation of ammonia. 4NH3 (aq) + 5O2 (g) 4NO (g) + 6H2O (g), Delta H= -905kJ a) State the reaction conditions that favour the production of nitrogen monoxide. b) A

asked by Ahmed on December 4, 2011
28. ## Statistics

. [16 points] A coach uses a nw technique to train gymnasts. 7 gymnasts were randomly selected and their competition scores were recorded before and after the training. The results are shown below. Before After 9.7 9.9 9.4 9.7 9.6 9.2 9.6 9.4 9.6 9.7 9.7

asked by Elyse on April 25, 2010
29. ## chemistry

Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g) + O2(g) + heat =NO (g)

asked by Shanta on January 6, 2010
30. ## Chemistry

A 2B + C at a certain temperature the equilibrium pressure of the system is 0.318atm. Determine Kp for this reaction. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2B + C = 0.318atm /3 = 0.106 CO2 = 0.106 atm NH3 = 2(1.06) atm =0.212 atm Kp = PNH3 ^2 x PCO2 kp

asked by Tri on October 8, 2008
31. ## Food Education

How is Sodium used in the body? I need to know this for some Food Tech reaserch. Thanks. Thank you for using the Jiskha Homework Help Forum. The body uses sodium to regulate blood pressure and blood volume. Sodium is also critical for the functioning of

asked by Paige on November 19, 2006
32. ## science, Chemistry

Sample Results: Mass (g) Trial 1 Trial 2 Filter paper 1.36 1.29 Filter paper + PbI2 3.20 3.09 PbI2 ? ? Calculations and Discussion Questions: ( show the step by step) 1. Calculate the mass of precipitate collected in Trial 1 and Trial 2. Include these

asked by Hiba on April 4, 2019
33. ## Math

1. –(10)^–1 (1 point) –1/10*** -1/-1^10 1/10 10 2. 1/c^-5 (1 point) c^5 5c –c^5*** –5/c 3. What is the value of y^-5/x^-3 for x = 2 and y = –4? (1 point) 10/3 128 -1/128 –128*** 4. Is the number written in scientific notation? If not,

asked by Bethany on April 22, 2016
34. ## Physics

An ornamental thermometer, commonly known as a Galileo thermometer, contains a number of spheres of hollow colored glass, representing different temperatures, immersed in a column of ethanol. A particular sphere rises from the bottom to the top of the

asked by Erin on May 1, 2014
35. ## MIT 2.01X

Posted by MAN on Tuesday, June 18, 2013 at 9:24pm. We will obtain bending moment diagrams for three beams and calculate stresses inside the beams. For each beam, take the x-axis along the neutral axis of the beam, oriented from left to right, with origin

asked by AMK on June 23, 2013
36. ## Chemistry

In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a

asked by Zachary on November 13, 2012
37. ## Chemistry

How would I go about doing this problem? 146 mL of wet H2 gas is collected over water at 29.0 degrees C and room pressure of 750 torr. Give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry

asked by Marie on December 8, 2010
38. ## physics waves transverse longitudinal

i real stuck on this and i really want explanations please. in which sprind do transverse waves travel faster, small diameter spring or slinky? i think this be the transverse waves but i not know how to explain why. in which spring do longitudinal waves

asked by Shreya on January 9, 2012
39. ## physics

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on

asked by Ricky on July 7, 2010
40. ## physics

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on

asked by Ricky on July 7, 2010
41. ## chemistry

Imagine that 25.0 of ice at -3.0C is placed in a container holding water vapor at temperature of 120.0C . After a certain amount of time, the container has expanded slightly, but holds only water vapor at 110.0C. what is the final volume of the container?

asked by Fajer on December 5, 2011
42. ## chemistry

Imagine that 25.0 of ice at -3.0C is placed in a container holding water vapor at temperature of 120.0C . After a certain amount of time, the container has expanded slightly, but holds only water vapor at 110.0C. what is the final volume of the container?

asked by Fajer on December 5, 2011
43. ## chemistry

Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18

asked by Shanta on January 5, 2010
44. ## Related Rates

Water is leaking out of an inverted conical tank at a rate of 500 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 10 meters and the diameter at the top is 4.5 meters. If the water

asked by Tom on October 14, 2006
45. ## ap chem

A mole of helium gas contains 6.02x10^23 helium atoms. How many helium atoms are there in a micromole of helium? How many moles of helium does 1.25x10^20 atoms of helium represent? ~I have no idea how to start or what the value of a micromole is?

asked by sara on December 13, 2006

1. Write the fraction eight-ninths as a percent. Round to the nearest hundredth of a percent where necessary. (1 point) 88.89% 1.13% 44.44% 66.67% 2. Write the decimal 0.041 as a percent. (1 point) 41% 4.1% 410% 0.41% 3. A study in your town found that 54

asked by Delilah on December 5, 2012
47. ## Physics

Calculate how much pressure (due to the liquid) would be on a 83 kg person if they were 53 m deep in... a.)...freshwater. The density of freshwater is 1000 kg/m3. Express your answer in both pascals and atmospheres. 1 atm = 1.013×105 Pa. Pa atm

asked by Cameron on October 21, 2018
48. ## Chemistry

Solarcaine aerosol spray is used for temporarily relieving pain as it works as a topical anesthetic numbing the skin. Solarcaine is in fact benzocaine, C9H11NO2 with molar mass 165.2 g/mol. If a 100.0 mL spray can contains 1.00 g of benzocaine, calculate

asked by Caitie on April 29, 2015
49. ## Chemistry

PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by placing equimolar amounts of the three gases shown in the equation above in a suitable rigid container held at constant volume. Equilibrium is established at 546 K. (A) When equilibrium is

asked by Molly on April 25, 2011
50. ## Accounting

I need to prepare a cash flow statement and determine total cash inflows and total cash outflows. Rent for the month \$650 Monthly take home salary \$1,950 Cash in checking account \$450 Savings account balance \$1,890 Spending for food \$345 Balance of

asked by stuckinmath on July 22, 2008
51. ## Chemistry

1.) It takes 2.085x10^1 mL of 1.30x10^-1 M NaOH to titrate 2.9660x10^-1 grams of solid monoprotic acid (HX). What is the molar mass of this acid. Express in scientific not. w/ 3 sig figs. Here is my work, but I'm not sure if it's right. Please check.

asked by Paige on June 11, 2018
52. ## physics

A primitive diving bell consists of a cylindrical tank with one end open and one end closed. The tank is lowered into a freshwater lake, open end downward. Water rises into the tank, compressing the trapped air, whose temperature remains constant during

asked by kb on November 19, 2008
53. ## Fluid Mechanics

A small rocket motor, fueled with hydrogen and oxygen, is tested on a thrust stand at a simulated altitude of 10 km. The motor is operated at chamber stagnation conditions of 1500 K and 8.0 MPa (gage). The combustion product is water vapor, which may be

asked by Katie on March 22, 2009
54. ## Social Psychology

The topic is Peer-Pressure I see education as such a critical force to "arm children" and combat them into feeling empowered as individuals, not just a face or sheep in the crowd. Although education does a lot to promote team work and collaboration, I also

asked by Sharon on September 2, 2011
55. ## college chemistry

Pentane, C5H12, and hexane, C6H14, combine to form an ideal solution. At 25⁰C the vapor pressure of pentane is 511 torr and that of hexane is 150 torr. In the vapor over a pentane-hexane solution at 25⁰C, the mole fraction of pentane is 0.15. What is

asked by Stephanie on April 28, 2010
56. ## Data managment math

1: What is the probability that at least two of the 12 councillors elected in the next municipal election will have the same birthdays on the same day? 2:Hoyda has 15 percent of the car market. If a random sample of 20 auto mobiles is conducted what is the

asked by Samir on January 27, 2008
57. ## Physics

I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6-kg block of ice has a temperature of -14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final

asked by Sam on April 13, 2008
58. ## Physics

I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6-kg block of ice has a temperature of -14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final

asked by Sam on April 13, 2008
59. ## Physics waves

in which sprind do transverse waves travel faster, small diameter spring or slinky? i think this be the transverse waves but i not know how to explain why. in which spring do longitudinal waves travel faster? i think that be the small spring because it

asked by Shreya on January 8, 2012
60. ## chemistry

Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18

asked by Shanta on January 8, 2010
61. ## Statistics

For questions 1-5, write the null and alternative hypothesis. 1. Does the water temperature have an effect on the number of people in the pool? 2. Does the weather have an effect on the number of people at the beach? 3. A fitness center is running a

asked by Cam on May 3, 2013

A 0.21g sample of sulfuric acid is dissolved completely in sufficient water to make 0.25 litre of final solution. Calculate the hydrogen ion concentration in mol1-1 in this solution and show successive steps in the calculation: If 0.21g in 0.25l then 0.84g

asked by Hol on March 9, 2007
63. ## science

1. Name a Protist that has both plant and animal characteristics. 2. What compound is usually identified by the use of iodine? 3. What important gas is released during photosynthesis? 4. Contrast photosynthesis and respiration. 5. Is movement

asked by Jasmine on November 10, 2008
64. ## Chem II

The equilibrium constant, Kp for the reaction PCl5 PCl3 + Cl2 is 1.05 at 250 degrees C. The reaction is started with PCl5, PCL3 and Cl2 at 0.177, 0.223, and 0.111 atm at 250 degrees C. When the reaction comes to equilibrium, the pressure of _________ PCl3

asked by Ken on June 16, 2008
65. ## Physics

A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38

asked by Angelina on April 10, 2012
66. ## Physics

A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38

asked by Angelina on April 10, 2012
67. ## Physics

A 0.1134kg spherical meteor of diameter 3 cm enters the earth’s atmosphere at an elevation of 121920m with a velocity of 13411.2 m/s. The meteor’s temperature is -73.15˚C. The specific heat at constant volume (Cv) of the meteor is 800 J/kg˚C. (a) If

asked by Jack on November 28, 2016
68. ## chemistry

146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room conditions and the

asked by melanie on December 8, 2010
69. ## Physics

A hydraulic lift in a garage has two pistons: a small one of cross-sectional area 3.70cm2 and a large one of cross-sectional area 210cm2 . Part A If this lift is designed to raise a 3100-kg car, what minimum force must be applied to the small piston? Part

asked by Help! final next weel on December 3, 2013
70. ## Chemistry

A student weights 1.700 g of succinic acid and dissolves it in water in a 250.0 mL volumetric flask. A 25.00 mL sample of this solution is withdrawn and placed in a 125 mL Erlenmeyer flask, to which 5 drops of the acid-base indicator phenolphthalein is

asked by Mary on October 26, 2014
71. ## Chemistry

What is the molality of a glucose solution prepared by dissolving 18.0g of glucose, C6H12O6 in 125g of water? A)0.000794 B)0.144 C)0.699 D)0.794 Molality is the number of moles of solute per kilogram of solvent. Because the density of water at 25°C is

asked by CIndy on April 27, 2007
72. ## chemistry

Calculate ∆T for the reaction. Assume the initial temperature of both reactants is 25.0◦C. Calculate the volume of the reaction mixture. Calculate the mass of the reaction mixture. Assume the density of the mixture is 1.03 g mL^(-1). Calculate the heat

asked by Anonymous on October 22, 2014

A 160-N child sits on a light swing and is pulled back and held with a horizontal force of 100N. The tension force of each of the two supporting ropes is: A uniform plank is supported by two equal 120N forces at X and Y at both ends of the plank.The

asked by Diane on December 10, 2006
74. ## college

The diameter of a wire should be 8 cm. It follows a normal distribution and has a standard deviation of 0.01 cm. A person tests each delivery by taking 5 samples, accepting the goods only if the mean is at most 8.01 a) Find the probability of type 1 error?

asked by Allan on March 14, 2010
75. ## Chemistry

The molecular weight of an unknown gas is found by measuring the time required for a known volume of the gas to effuse through a small hole, under constant pressure. The apparatus is calibrated by measuring the time needed for the same volume of O2

asked by Gi on July 19, 2018
76. ## cHEMISTRY

Strontium metal is responsible for the red color in fireworks. Fireworks manufacturers use strontium carbonate, which can be produced by combining strontium metal, graphite (C), and oxygen gas. The formation of one mole of SrCO3 releases 1.220 x 10^3 kJ of

asked by Jess on February 1, 2007
77. ## Chemistry

It took 109.8 years for a 300.0 mg sample of an unknown radioactive material to completely disintegrate. Calculate the mass of the element (in grams/mole) assuming that the disintegrations per second are constant over the life-time of the sample, and the

asked by Anonymous on November 26, 2006
78. ## science

how the mountain grows? I only know of two ways that a mountain grows. One is if it is volcanic, growing on its own ejection of lava. Another would involve two of earth's tectonic plates exerting pressure on each other, pushing the mountain up.

asked by neri bles on September 2, 2006
79. ## PHYSICS!!!! help!!!

A perfectly spherical, but squishable ball of radius 10 cm is blown up to an internal pressure of 2 atm. The ball is placed between two perfectly vertical walls and the walls are slowly squeezed together. Initially the ball slips down the walls, but when

80. ## Chemistry

Hank Hill loves everything about gas propane, C3H8. One day his son Bobby asks him the following set of questions about propane. Hank hems and haws for a few moments and finally tells his son he'll get back to him with answers but he has to mow the lawn

asked by Anonymous on May 9, 2011
81. ## chemistry

Limestone rock contains solid calcium carbonate that can react with acid to give products. In one experiment, 1.452 g of limestone rock is pulverised and then treated with 25.00 mL of 1.035 M HCl solution. After the reaction is completed, the resulting

asked by Anonymous on February 12, 2016
82. ## Chemistry

If 16.5 g of oxygen gas is required to inflate a balloon to a certain Volume at 26.5 degrees Celcius, what mass of oxygen gas is required to inflate the same balloon to the same volume and pressure at 10.0 degrees Celcius?

asked by Amanda on May 2, 2011
83. ## Physics

A spherical satellite has 12 identical monopropellant thrust chambers for attitude control with the following performance characteristics: thrust (each unit): 5 lbf; Is (steady state or more than 2 sec): 240 sec; Is (pulsing duration 20 msec): 150 sec; Is

asked by Matthew on February 19, 2016
84. ## Physics

Your friend has decided to make some money during the town tombola by inventing a game of skill that can be installed. In the dame as she has developed it so far, the customer shoots a rifle at a 5.00 cm diameter target falling straight down. Anyone who

asked by qwertzuiop on February 8, 2012
85. ## physics Waves

in which spring do transverse waves travel faster, small diameter spring or slinky? i think this be the transverse waves but i not know how to explain why. in which spring do longitudinal waves travel faster? i think that be the small spring because it

asked by Shreya on January 9, 2012
86. ## Chemistry

At 500 degrees celsius, K for the formation of ammonia from nitrogen and hydrogen gases is 1.5x10-5. N2(g)+3H2(g)->/

asked by Jessica on March 21, 2015
87. ## Chemistry

I posted a question like this but my numbers were actually wrong. These are the correct ones. 5.94e-3 / 1.11e-3 = 5.33e-2/2.66e-2 5.35 = 2.00^m I guess this is not correct because I do not know a whole number that will give you 5.35. Chemistry - DrBob222,

asked by Hannah on February 28, 2012
88. ## Physics

Thank you for any help and assistance. Here is the question/problem: Because of the pressure inside a popcorn kernel, water does not vaporize at 100 degrees Celsius. Instead, it stays liquid until its temperature is about 175 degrees Celsius, at which

asked by Demi on March 28, 2010
89. ## Physics

Gas mixture contains 2.50 mol of O2 and 3.00 mol of Ar. Part A What is this mixture's molar specific heat at constant volume? Cv = ________R Part B What is this mixture's molar specific heat at constant pressure? Cp = ________R

asked by Physics on October 1, 2017
90. ## physics

A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2 through a horizontal section of pipe whose cross-sectional area is A2 = 0.0769 m2. The gas has a density of ρ = 1.30 kg/m3. The

asked by Archy on November 22, 2014
91. ## physiscs

A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2 through a horizontal section of pipe whose cross-sectional area is A2 = 0.0779 m2. The gas has a density of ρ = 1.30 kg/m3. The

asked by leena on December 9, 2015
92. ## Chemistry

If an equal number of moles of the weak acid HOCN and the strong base KOH are added to water, the resulting solution will be acidic, basic or neutral? There is a complicated answer and a sensible answer. Both arrive at the same answer. But here is the

asked by Joel on April 27, 2007
93. ## Literature

Polonius is giving advice to his son, Laertes, about living life well among other people. Laertes was about to set off from Denmark to Paris for university. http://www.sparknotes.com/shakespeare/hamlet/section3.rhtml =) I'm much better at science,

asked by Writeacher on February 21, 2007
94. ## physics

Pls help me. Explain the following a. When methylated spirit is poured on the skin, it has cooling effect, b. A piece of ice at 0 degree Celsius cools a drink more effectively than the same mass of cold water at 0 degree Celsius, c Ice floats on water, d.

asked by rita on May 12, 2018
95. ## phy.

Larry weighs 300 N at the surface of the earth. what is the weight of the earth in the gravitational field of Larry? -force= GMm/d^2 would i set it up like force= (9.8m/s^2)(300 N)? an astronaut lands on a planet that has twice the mass as earth and twice

asked by Julie on October 16, 2007
96. ## Chemistry

Tutors: thanks for your help. Is this how this problem is solved ? A sample of Xenon gas at 20degrees celcius and 0.570atm is cooled to a pressure of 0.100atm. If the volume remains constant what is the final temperature in degree celcius? Solution: Using

asked by Cliff on November 23, 2010
97. ## chemistry

How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H

asked by Linda on December 8, 2008
98. ## chemistry

How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H

asked by Linda on December 8, 2008
99. ## Chemistry

A 2.50 L flask was used to collect a 5.65 g sample of propane gas, C3H8. After the sample was collected, the gas pressure was found to be 741 mmHg. What was the temperature of the propane in the flask. P= 741 mmHg(1 atm/760 mmHg)= .975 atm V= 2.50 L n=

asked by Lauren on October 23, 2007
100. ## Chemistry

At a certain temperature, the solubility of N_2 gas in water at 2.38 atm is 56.0 mg of N_2 gas/100 g of water. Calculate the solubility of N_2 gas in water, at the same temperature, if the partial pressure of N_2 gas over the solution is increased from

asked by Becca on February 4, 2012