on a domestic gas cooker the temperture in the hottest part of the flame is about 2200k.if salty eater is spilled in the flame then it becomes yellow-orange.measurements with a spectrometer show the presence of an emission line at 589n

26,142 results
  1. Statistics

    The mean cost of domestic airfares in the United States rose to an all-time high of $385 per ticket. Airfares were based on the total ticket value, which consisted of the price charged by the airlines plus any additional taxes and fees. Assume domestic

  2. chemistry

    Hi! Can you please check if my answers are correct? And, can you please tell me any other details you think are important to add. Also, the last two questions i have no clue how to answer. can you help? thanks so much! 3.A burning candle produces a

  3. Economics

    In the country of Alpha, T-shirts are sold domestically in a competitive market, the equilibrium price is $10, and the equilibrium quantity is 100. (a) Draw a correctly labeled demand and supply graph for the domestic T-shirt market in Alpha. Plot the

  4. university chemistry

    The instruction booklet for your pressure cooker indicates that its highest setting is 11.4 psi. You know that standard atmospheric pressure is 14.7 psi, so the booklet must mean 11.4 psi above atmospheric pressure. At what temperature will your food cook

  5. Chemistry

    a sample of gas of unknown pressure occupies 0.766 L at the temperture of 298k the same sample of gas is than tested under known conditions and has the pressure of 32.6kPa and occupies 0.664 L at 303 k. What is the original pressure of gas

  6. Chemistry -Flame colors (check+help)

    What are the characteristic flame color for sodium, potassium, barium, copper, strontium, and calcium? Explain why? Ans: i know the flame colours, but for the explain why, could the below be a possible answer? The characteristic flame color is due to the

  7. Science-Experiment-Questions

    I did an experiment on a burning candle, and I need help with some of the questions. Thank you very much in return. Please no websites.--more information would be appreciated, thanks:-) I'll list everything of what we went through. Materials: -1 standard

  8. science

    why does a candle appear to go out when a copper coil is placed over the flame? Combustion requires three things: fuel (wax here), oxygen (air here), ignition temperature (a match here probably). Remove one and the combustion stops -- that's the principles

  9. Science

    When you put your hand near a candle, you feel heat directly over the flame but cool on the sides of the flame. Why does this difference occur? I think because of convection the warmer air rises and the cooler air sinks.

  10. Chemistry

    What adjustment would you make to the Bunsen burner (a) to correct a flame with an orange tip (b) to correct a ragged, noisy flame? ..I always get the purpose of the gas inlet / air inlet mixed up

  11. physics

    does the flame of gas stove emit light?explain

  12. Chemistry

    Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution

  13. Chemistry

    When your body breaks down sugar completely, how much heat is released compared to burning the same amount of sugar in a flame? The body releases___ less heat than the flame*** more heat than the flame same amount of heat as a flame the body releases so

  14. Chemistry

    Is the temperature of a luminous flame greater than that of a non luminous flame? Please explain.

  15. math

    A rice cooker was sold for $60 after a discount of 60%. What was the price of the rice cooker?

  16. physics

    This graph in the figure (Figure 1) shows how the temperature of an initially solid sample changes as time goes by when it is placed above a flame that delivers a constant heating power (that is, a fixed amount of energy input in the form of heat each

  17. science

    why is the equator region the hottest part of the earth’s surface?

  18. Chemistry

    Explain why the appearance of the wood flame is yellow whereas the gas flame most often appears blue.

  19. Physics

    A pressure cooker is shaped like a can with a lid 25 cm in diameter. If the pressure in the cooker can reach 3.0 atm, how much force must the latches holding the lid onto the pot be designed to withstand? I have F=PA I have my P: 3.03 * 10^3 N/m^2 A=pi(.25

  20. Chemistry: Bunsen Burner Lab

    Hi! I have recently completed a bunsen burner lab and need help with a few conclusion questions: 1) What kind(s) of energy is released by the reaction of fuel and air in this system? 2) Which part of the Bunsen flame is hottest? How do you know? ->I

  21. Flame Colors - Chemistry

    I've searched the internet but I can't find out what color flame a Nickel (or even better NiSO_4) solution will produce when burned. As well, does Aluminum (Al(SO_4)_3 ) have a flame color from the flame test? Don't know sorry!Wih I could help!Can you help

  22. Maths

    The cash price of a gas cooker is sh. 9000, a customer bought the cooking gas by 15 monthly instalments of sh. 950 each installment. Calculate the carryin charge

  23. SCIENCE

    When a student added Zinc granules to dilute HCI, a colorless and odorless gas was evolved, which was tested with a burning match stick, it was observed that: (a) The match stick continued to burn brilliantly. (b) The match stick burnt slowly with a blue

  24. Physical science

    what is the dependent variable in an experimentthat shows how the volume of gas changes with changes in temperture?

  25. chemistry

    Ammonia reacts with oxygen gas to form nitrogen monoxide and water. At constant temperture and pressure, how many of nitrogen monoxide can be made by the reaction of 800. ml of oxygen gas?

  26. Physics

    1. Water with a mass of 2kg is held at constant volume in a pressure cooker. 10,000 J of energy is added from the heater inside the pressure cooker. The container is not terribly well insulated, so the container leaks 2000 J of energy to the surrounding

  27. chem

    If you have a properly adjusted hot flame, which is pale blue with three distinct cones, what is observed if the gas control valve is slightly closed? Explain.

  28. chemistry

    The instruction booklet for your pressure cooker indicates that its highest setting is 13.5psi psi . You know that standard atmospheric pressure is 14.7 psi \rm psi, so the booklet must mean 13.5psi psi above atmospheric pressure. At what temperature in

  29. Chemistry

    What color would Nickel ions burn (say in a compound of NiSO4)? Green? If you searched this on the web please post the link for a reference I can use. I don't have a reference. In fact, it is not listed in any text book I own and it is not listed on any of

  30. chemistry

    A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constant-temperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in

  31. Chemistry

    There's a test tube filled with a gas, and you bring a flame to the mouth of the tube. Many things could happen... The flame might get snuffed out and there might be a popping sound... so how can you find the density of that gas in relation to the air

  32. Chemistry

    Hii! I have a question: So the flame photometer uses a natural gas flame (1800 oC), what if it uses acetylene - nitrous oxide flame which is ~3000 oC, what would happen to the emission intensities? Thanks!

  33. Physics

    Suppose a flame of a gas burner stove emits light just like a blackbody.The flame appears blue,emiting most of the light as a wave length of 475 nanometers. what is the temperature of the flame. How do I solve this?

  34. 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

  35. Chemistry

    Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation 3H2(g)+N2(g)→2NH3(g) PArt 1: How many grams of NH3 can be produced from 3.26 mol of N2 and excess H2. Part 2: How many grams of H2 are needed to produce

  36. Chemistry

    A eudiometer contains 65.0 ml sample of gas collected by the diplacement of water. The water levels inside and outside the eudiometer are the same. The atmospheric pressure is 92.5 kPa and the temperture is 23 degrees. What volume will the dry gas occupy

  37. chemistry

    The instruction booklet for your pressure cooker indicates that its highest setting is 13.5psi . You know that standard atmospheric pressure is 14.7psi , so the booklet must mean 13.5psi above atmospheric pressure. At what temperature will your food cook

  38. chemistry

    which of the following steps in the formation of KCI releases energy? A.K{solid} -> K{gas} B.K {GAS} -> K+ {GAS} + e- C.C1 {GAS} -> C1- {GAS} D.C1 {GAS} + e- -> C1 - {GAS} E. K+ {GAS} + C1- {GAS} -> KC1 {SOILD} A. A B. C C. B AND A D. D AND E I will be

  39. Chemistry

    A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constant-temperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in

  40. astronomy

    on a domestic gas cooker the temperture in the hottest part of the flame is about 2200k.if salty eater is spilled in the flame then it becomes yellow-orange.measurements with a spectrometer show the presence of an emission line at 589n. 1) the solar

  41. Chemistry

    Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution

  42. Chemistry

    The volume of a gas is increased from 100mL to 250 mL by heating it.If the original temperture of the gas was 15.0°c what will be the final temperture in °c

  43. chemistry

    In a bunsen burner experiment, when you place a piece of soot covered chalk over the hottest part of the flame, it changes back to a white color. What is the equation for this process? Thank you

  44. Chemistry 101

    You have a sample of gas in a flask with a volume of 250 mL. At 25.5 degrees Celcius, the pressure of the gas is 300 mm Hg. If you decrease the temperture to -5.0 degrees celcius, what is the gas pressure at this lower temperture?

  45. Physics

    I had posted this question once before, but no one helped me on this one. So I am posting this question again. Suppose the flame of a gas burner stove emits light just like a blackbody. The flame appears blue emiting most of the light at a wave length of

  46. phy

    During an isovolumetric process, the pressure on the gas is doubled and the amount of gas is tripled. If the initial temperature of the gas is 300k, what is thefinal temperture.

  47. chemistry

    when you hold a hydrogen filled pipet bulb horizontally with its mouth about 1 cm from a falme while gently squeezing what would you observe? a. the flame goes out b. a gentle pop and the flame may have been blown out c. the flame got bigger d. nothing

  48. physics

    Suppose the fame of a gas burner stove emits light just like a blackbody. The flame appears blue,emiting most of its light at a wave lengh of 475nanometers. what is the temperature of the flame? How do I solve this?

  49. chemistry -------------chemistry

    If a flame on the candle burns red , how does energy of that flame compare to that of the Bunsen burner flame ? and why ? ans:The Bunsen burner flame has higher temperature than candle’s flame . Because flame of candle emit red ,and red has the least

  50. geometry

    A slow cooker is used to cook food slowly. The diameter of a slow cooker is 15 inches, and the volume is 1400 cubic inches. A second slow cooker has a diameter that is 20% greater. What is the volume of the larger pot?

  51. chem

    A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?

  52. chem

    A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?

  53. chemistry

    A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?

  54. chem

    what would the temperature inside the pressure cooker beif the vapor pressur of water inside the cooker was 3.08 atm

  55. English

    1. You don't have to unplug the electric cord to the pressure cooker. You can see the light of preserving temperature on the cooker. If you unplug the electric cord, the cooked rice in the cooker will be spoiled with ease. (Is this passage correct? Would

  56. chem

    what would the temperature inside the pressure cooker beef the vapor pressure of water inside the cooker was 3.08 atm

  57. Health and science

    Explains the science, technology, engineering and/or mathematics behind a solar cooker that work day and night and how could a solar cooker that works day ajd night both address the everyday problems and have a broader impact locally or globally.

  58. History

    What weapon/technology would be the most beneficial during WW1? Trench warfare, machine guns, field guns, rifles, poison gas, flame thrower, aircraft, tanks, U-boats, or battleships? I'm not sure but I eliminated trench warfare, flame throwers, aircraft,

  59. Geography

    Does the flame of a gas stove emit light?

  60. science

    Does the flame of gas stove emit light

  61. history

    what are three important US domestic politics(domestic events/issues) from the 1990s? I have been searching for the answer, but I keep on only finding foreign politics and not domestic ones and the domestic issues I do find are not from 1990s...someone

  62. chemistry

    what are the advantages of using a blue flame instead of a yellow flame for heating objects on a bunsen burner?

  63. science

    dose the flame of a gas stove emit light

  64. math

    A flame is ejected vertically upward from the groung at 15m/s.Find the height of the flame after 2.5seconds

  65. engineering

    I need help with my Fire Engineering homework. What is the heat release rate of a flame measuring five feet in height assuming the flame is in the center of a room?

  66. Chemistry

    What is the function of Compressed Air in GC-FID (i.e. Gas Chromatography-Flame Ionization Detector)?

  67. heat

    a silver bar 0.125 meter long is subjected to a temperture change from 200 degree celsius to 100 degree celsius. What will be the lenght of the bar after the temperture change? I will be happy to critique your thinking and/or work on this question. Please

  68. Science

    Some gardening books tell people to water their plants during the morning or the evening instead of during the sunniest , hottest part of the day . Why do you think books say this

  69. English

    1. He made the robot happily. (Does 'happily' modify the verb 'made'?) 2. He made the pressure cooker repaired by the repairman. 3. He made the repairman repair the pressure cooker. (Are both grammatical and have the same meaning?)

  70. inorganic chermistry

    (a)explain why the colour for ions in the flame tests differ (b)Why do the chemicals have to be heated in the flame first before the colour light is emitted?

  71. math

    the temperture was 80 degrees F at noon on tuesday the temperture changed -2 degrees F per hour from noon on tuesday until 10:00 am the next morning what is the new tempeture

  72. Burning Candle experiment

    what is the shape of the candle flame? To me it looks kind of like a leaf--more like a teardrop. Am I correct? where does the wax from the candle go? Does it just burn in the flame?

  73. Economics

    What is the relationship between the level of Gross Domestic Product and economic well-being. What factors of well-being are missing from the Gross Domestic Product? Is there a point where the Gross Domestic Product could increase to such a high level that

  74. Physics

    Two moles of helium gas initially at 213 K and 0.17 atm are compressed isothermally ton1.19 atm. Find the final volume of the gas. Assume that helium behaves as an ideal gas. The universal gas constant is 8.31451 J/K · mol. Answer in units of m3 Part 2

  75. chemistry

    6 part question 1. describe the appearance of a Bunsen flame that is getting insufficient air? 2. describe the appearance of a Bunsen flame that is getting too much air. 3. When inserting glass tubing into a rubber stopper, how far from the stopper should

  76. science

    1.i state of matter a physical change or a chemical change 2.why does heat go to coldest to hottest change? 3.what type of phase change occur when a substance change to solid to gas 4.what is an ex of sublimation

  77. Chemistry

    We did a flame test today to see what substances produce what colors when burned. Can you please explain... Why each of the different elements have a different atomic emission spectrum? Would the flame tests be useful for detecting individual elements

  78. history

    Improved technology in the production of small cars often results in lower production costs. Which of the following will most likely result from these reduced production costs? 1)the price of domestic small cars will decrease. 2)the demand for domestic

  79. social studies

    improved technology in the production of small cars often results in lower production costs? which of the following will most likely result from these reduced production costs? (1)the price of domestic small cars will decrease. (2)the demand for domestic

  80. science

    Name the type of lens required to obtain 3tymes magnified img of a candle flame on a wall. The candle flame is 6m away from the wall calculate the focal length..???

  81. physics

    An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the

  82. physics

    An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the

  83. physics

    An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the

  84. science

    I put a peice of copper into a flame and I need to write a word equation for it. Whats a flame made up of cause I wanna write copper + _____ -> _______ + ________ I know its a synthesis reaction.

  85. physics

    You can comfortably hold your fingers close beside a candle flame, but not very close above the flame. Why? In a still room, smoke from a candle will sometimes rise only so far, not reaching the ceiling. Explain why.

  86. physics

    Find the heat flux due to radiation from a gasoline pool fire whose flame is 3 m tall with a 1 m diameter, and it is 3.5 m away from a target fuel. Assume e = 0.98 with a flame temperature of 1,300 K. Solve this problem by determining the configuration

  87. grammar

    does this word make sense in this sentence? domestic The minister saw from the statistics that imported goods were cutting into the domestic market.

  88. chemistry

    some oxygen occupies 500.0 ml when its temperature is 40.0 C . if you wished to decrease the volume by 100.0 ml, to what temperture celsius would you need to lower the gas? not sure how to set this up right..keep thinking i need to subtract 100.0 from

  89. chemistry

    when doing a flame test: the hydrated salt is overheated and the anhydrous salt thermally decompose, one product being a gas; will the reported value of x be too high, too low on the unaffected?

  90. Chemistry

    1. List all the possible actions that give a red flame test and precipitate in the presence of sulfate ions. 2. If all traces of the two metal cations are removed from the solution at test 4, what might the flame colour be when a sample of the solution is

  91. science

    as temperture rises,solids generally become more soluable in water but gases become less soluble.if a soft drink comtains high concentrations of sugar and carbon dioxide.which of the following may be expected to happen if it is cooled down? 1)sugar may

  92. Alg2

    the annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.2% per year, measured in

  93. Alg2

    he annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.2% per year, measured in 1996

  94. Alg2

    The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.2% per year, measured in

  95. Science-Urgent

    I did an experiment on a burning candle, and I need help with some of the questions. Thank you very much in return. Please no websites.--more information would be appreciated, thanks:-) I'll list everything of what we went through. Materials: -1 standard

  96. Mico Econ

    Which of the following situations will arise in the domestic market following the imposition of an import ban? Question 13 options: imports increase, domestic production increases, prices increase imports increase, domestic production decreases, prices

  97. Chem

    A 1.00-mole sample of ammonia at 13.0 bar and 20°C in a cylinder fitted with a movable piston expands against a constant external pressure of 1.00 bar. At equilibrium, the pressure and volume of the gas are 1.00 bar and 22.0 L, respectively. a) calculate

  98. Math

    a 20cm candle has wick at each end.if each end is lit, the lower flame burns at a rate of 9 cm/hr and the upper flame burns at a rate of 6 cm/hr, how long will it take for the flames to meet?

  99. Science

    Does anyone have the spectra for sulfur? In class we did this using a flame test, where we put the sulfur in a flame over a bunsen burner and used a spectra scope to find sulfur's spectra, but I seem to have lost this data. I've been looking on the web,

  100. heat

    20 cubic inches of a gas with an absolute pressure of 5 psi is compressed untill its pressure reaches 10 psi. what is the new volume of the gas? ( assuming that there s no change in temperture) a. 5 cubic inches b. 10 cubic inces c. 40 cubic inches d. 100

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