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Type: Posts; User: jdziegler

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  1. Answers
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    so does that mean you times the answer you get in...

    so does that mean you times the answer you get in the equation by 6.022 *10^23 moles?
  2. Answers
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    2,954

    Im having trouble calculating it up to mole per...

    Im having trouble calculating it up to mole per photons or mole of photons..
  3. Answers
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    2,954

    Argon laser emits a blue beam with wavelength

    An argon ion laser emits a beautiful blue beam with a wavelength of 488.0 nm. What is the energy per mole of photons emitted?
  4. wavelength of visible lines in the line spectrum of hydrogen

    Calculate the wavelengths (in nm) of the visible lines in the line spectrum of hydrogen using the Rydberg equation (nf = 2; ni = 3, 4, 5, and 6).
  5. Inner electron configuration format of Na+ and Li+

    What is the electron configuration of Na+?

    What is the electron configuration of Li+?
  6. Answers
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    2,881

    Caramelization of sugar

    Why can one readily burn oneself caramelizing sugar or making sugar-based candies?
  7. Answers
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    4,801

    Fluorescein and rhodamine b

    What is the role of fluorescein and rhodamine b? Describe in one word.
  8. Answers
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    5,956

    Im so lost here! I don't understand what you are...

    Im so lost here! I don't understand what you are saying can you please explain this to me!
  9. Answers
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    1,572

    Comparing specific heats to atomic weights

    How do I compare the specific heats of the metals with their atomic weights. Should I see any trends?
  10. Answers
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    5,956

    Heat capacity of a calorimeter

    Assume you are performing the calibration step of Experiment 8 and you begin with 50 g of water at 20 C and 50 g of water at 80 C. After adding the two portions of water into your calorimeter setup...
  11. Answers
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    2,123

    Grams of neon in a neon sign

    A neon sign is made of glass tubing whose inside diameter is 2.0 cm and length of 4.0 m. If the sign contains neon at a pressure of 1.5 torr at temperature of 35C, how many grams of neon are in the...
  12. Answers
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    6,883

    Lead nitrate reacts with sodium sulfide

    Lead nitrate reacts with sodium sulfide ion to make lead sulfide and sodium nitrate. How much lead sulfide can one make from 15.05g lead nitrate and 10.02 g sodium sulfide?
  13. Answers
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    4,883

    Hexane reacts with Oxygen

    Hexane (C6H14) reacts completely with oxygen (O2) to make carbon dixode and water. Balance the equation. How many mole of oxygen are consumed per mole of hexane burned?
  14. Answers
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    1,179

    Grams of potassium dichromate

    How many grams of potassium dichromate should be added to a 50 mL flask to prepare a 0.02505 M solution when the flask is diluted to the water with water?
  15. Answers
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    641

    Concentration of new solutions

    Using a pipet, 10 mL of a 0.1005 M HCl solution was paced in a 50 mL volumetric flask and the flask was filled to the mark with water. What is the concentration of the new solution?
  16. Answers
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    5,213

    Local atmospheric pressure

    Look up the atmospheric (or barometric) pressure in your area in the newspaper, on television, or through another news outlet. What are the units used? Convert to mm Hg. Convert to mm H2O.
  17. Answers
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    1,951

    Water barometers in mm Hg

    If the column of water in the water barometer rose to a height of 33 feet, what would the atmospheric pressure be in mm Hg?
  18. Answers
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    2,128

    Atmospheric Pressure

    Should atmospheric pressure increase or decrease as one goes from the beach to the mountains? Explain.
  19. Correction to Calculate % H20 in hydrates and number of moles

    After 0.6523 g of CoCl2 * 6H20 is heated, the residue has a mass of 0.3423 g. Calculate the % H2O in the hydrate.

    What was the actual number of moles of water per formula unit CoCl2?
  20. Caculate % H20 in hydrates and number of moles

    After 0.6523 g of is heated, the residue has a mass of 0.3423 g. Calculate the % H2O in the hydrate.

    What was the actual number of moles of water per formula unit CoCl2?
  21. Answers
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    4,280

    Hydrate Formula decomposes to produce HCl

    If a hydrate of the formula MClY*H20 decomposes when heated to produce HCl, what change would you expect to occur when a piece of blue litmus paper is held in the path of vapor released? Explain.
  22. Answers
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    10,154

    Cobalt Chloride in Hygrometers

    Why is Cobalt II Chloride (CoCl2) often used in hygrometers?
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