Gweedo8

Most popular questions and responses by Gweedo8
  1. Chemistry

    What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according to the following reaction? 2C6H6(l)+15O2(g)-->12CO2(G)+6H2O(g) :delta:Hrxn=-6278kj

    asked on July 6, 2009
  2. Chemistry 101

    Aluminum reacts with sulfur gas to form aluminum sulfide. Initially 1.18 ml of aluminum and 2.25mol of sulfur are combined. 1. write a balanced equation? 2. what is the limiting reaction? 3. what is the theoretical yield of aluminum sulfide in moles? How

    asked on May 31, 2009
  3. Chemistry limiting reactants

    A student prepares phosphorous acid by reacting solid phosphorous triodide with water PI3+H2O-->H3PO3+HI The student needs to obtain 0.250L of phosphorous acid. (d=1.651g/mL). The procedure calls for a 45.0% excess of water and a yield of 75.0%. How much

    asked on May 31, 2009
  4. Chemistry

    1. Tin and oxygen gas are reacted together to form Tin (IV) oxide, a solid. If a piece of tin foil, 8.25cm x 21.5cm x 0.60mm (density = 7.28g/cm3) is exposed to oxygen and all the tin reacts, what is the mass of the oxidized tin foil? (98.4g) 2. From the

    asked on May 29, 2009
  5. chemistry

    Online chemistry lab preparing standards help? I was told to prepare some standard for a chemistry lab and here where the instructions: Obtain a solution of known phosphate concentration. In this lab we will use (1.e-002M) potassium dihydrogen phosphate,

    asked on July 1, 2009
  6. chemistry

    I have this long online lab that I am working on and I am stuck on converting Molarity then ultimately finding the % of phosphoric acid in the cola? There is all of different steps I went through with information but I am going to try to give only the info

    asked on July 3, 2009
  7. Chemistry 101

    A student prepares phosphorous acid by reacting solid phosphorous triodide with water PI3+H2O-->H3PO3+HI The student needs to obtain 0.250L of phosphorous acid. (d=1.651g/mL). The procedure calls for a 45.0% excess of water and a yield of 75.0%. How much

    asked on May 31, 2009
  8. Chemistry Stoichiometry

    1. Tin and oxygen gas are reacted together to form Tin (IV) oxide, a solid. If a piece of tin foil, 8.25cm x 21.5cm x 0.60mm (density = 7.28g/cm3) is exposed to oxygen and all the tin reacts, what is the mass of the oxidized tin foil? (98.4g) I am so

    asked on May 29, 2009
  9. Chemistry 101

    This is a different question then asked before,I had lab where I mixed 1.365 NaCL + AgNO3-->2.6242 AgCl. The 2 questions that I need help finding the answers to are: How much salt should be used to cause all of the silver nitrate to react? How much silver

    asked on June 8, 2009
  10. Chemistry

    What is the energy of a single photon from a helium -neon laser that emits light 632.8nm?

    asked on June 1, 2009
  11. Chemistry 101

    I had a snag from a question I asked yesterday, here is the thread. (My snag being the final post) I am trying to find the theoretical yield for this lab I am working on. The steps to finidng it would be great. In my lab I took 40mls of H2O + 4g of AgNO3+

    asked on June 8, 2009
  12. Chemistry 101

    Describe the molecular geometry around the carbon and oxygen atoms in oxalic acid. Make sure you include the bond angles.

    asked on June 1, 2009
  13. Chemistry

    I am trying to find the theoretical yield for this lab I am working on. The steps to finidng it would be great. In my lab I took 40mls of H2O + 4g of AgNO3+ 8g of NaCL then I stirred it and filtered in a buchner funnel to be left with 6.7496g of silver

    asked on June 7, 2009
  14. chemistry

    I am trying to answer a bunch of lab questions about a lab I did and am stuck on finding the morality of the diluted vinegar solution? Can anyone help me? (I hope I gave enough info) Here where the lab procedures that I already went through: Transfer 10mls

    asked on June 12, 2009
  15. MOLARITY QUESTION

    I am trying to answer a bunch of lab questions about a lab I did and am stuck on finding the morality of the diluted vinegar solution? Can anyone help me? (I hope I gave enough info) Here where the lab procedures that I already went through: Transfer 10mls

    asked on June 12, 2009
  16. Chemistry 101

    List 15 sets of quantum numbers (n,L,mL,ms) that could be used to describe all the electrons in phosphorous?

    asked on June 1, 2009
  17. INTRO TO STATISTICS HYPOTHESIS TESTING

    Math Horizons is a publication of the Mathematical Association of America. A recent issue reports that in the United States, graduating mathematics majors who also have studied actuarial science have an average first year income of 49,600. Suppose a random

    asked on March 19, 2010
  18. Physics

    a 123 kg man space finds himself 60 m away from his space ship and wants to get back. he holds a 2kg space gun which fires 5.00g bullet at a rate of 1500m/s. if he fires a single bullet in a direction directly away from the spaceship, how long would it

    asked on February 21, 2010
  19. chemistry

    (L2bar/mol2) (L/mol) Acetylene 4.448 0.05136 Calculate the difference in pressure (in atm) when 100.0g of acetylene acts as an ideal gas versus as a real gas in a 100L tank at a temperature of 1000K.

    asked on June 18, 2009
  20. Chemistry 101 Electrolytes

    What is the total number of ions formed when 2.00 grams of calcium chloride are dissolved in 100 grams of water. (Ignore any ions formed by the water). Note, this is a bit of a trick question. Read the problem carefully.

    asked on June 1, 2009
  21. chemistry

    I had to do this online lab and have a total of 8 questions at the end and I am stuck half way through. Can someone please walk me through the last few question? Here is the Lab and my homework: In this experiment, we will determine the heat of reaction

    asked on June 29, 2009
  22. Chemistry 101

    A student needs to run an experiment to determine the amount of substance in the solution. As more of the substance is dissolved, the more red the solution becomes. He is planning on using an absorption spectrometer to measure how much of a wavelength

    asked on June 1, 2009
  23. Physics

    A car accelarates from 40 mph to 60mph in 2.20 sec. determine the car's accelaration in gs. my answer is .911g Determine how far the car went during that 2.20 sec interval. 41.6 m

    asked on February 3, 2010
  24. Chemistry Electrolytes

    What is the total number of ions formed when 2.00 grams of calcium chloride are dissolved in 100 grams of water. (Ignore any ions formed by the water). Note, this is a bit of a trick question. Read the problem carefully.

    asked on June 1, 2009
  25. Chemistry

    find an atom which would have an electron with a quantum number of n=5, l=2, mL=0, mS=1/2 and a valence electron with a quantum number of n=6,l=1, mL=-1, mS=-1/2.

    asked on May 15, 2009
  26. Chemistry

    I am trying to find the theoretical yield for this lab I am working on. The steps to finidng it would be great. In my lab I took 40mls of H2O + 4g of AgNO3+ 8g of NaCL then I stirred it and filtered in a buchner funnel to be left with 6.7496g of silver

    asked on June 7, 2009
  1. Chemistry

    THank you problem solved

    posted on July 6, 2009
  2. chemistry

    Calculate the experimental heat of reaction using qwater = - qreaction. (use the mass of the solution at maximum temperature to be equal to the mass of the water). (57.97C=-57.97C) Calculate the theoretical heat of reaction. Steps.. 1. Write a balanced

    posted on June 29, 2009
  3. chemistry

    (L2bar/mol2) (L/mol) Acetylene 4.448 0.05136 Calculate the difference in pressure (in atm) when 100.0g of acetylene acts as an ideal gas versus as a real gas in a 100L tank at a temperature of 1000K.

    posted on June 18, 2009
  4. chemistry

    I understand how you obtained the grams of acetic acid but how do you find the percent, I am so of acetic acid in vinegar?

    posted on June 15, 2009
  5. chemistry

    The last question on my assignment is to find the % of acetic acid in the vinegar. But their was another previous lab that we did do determine the molarity of NaOH which was .0307. So I started from the point where I took 10 mLs of diluted solution and 2

    posted on June 14, 2009
  6. Chemistry

    Disregard this question I figured it out, THanks for all the help Bob

    posted on June 8, 2009
  7. Chemistry 101

    Disregard this thread I found the answer

    posted on June 8, 2009
  8. Chemistry

    In my math I took 8g of AgNo3/1.69.8731 g/mol=.0471 mol of AgNo3 Then since there is only one AgNO3 and one AgCL, then AgCl's has a mol of .0471, multiply that by its molecular weight of 143.321 and I receive 6.75 grams. not 3.4, where did I did I do

    posted on June 8, 2009
  9. Chemistry

    excuse me the product was AgCl not NaCl, that probably does not change the step but thought I would correct myself.

    posted on June 7, 2009