Recent content by Smith4046

  1. S

    Isopropyl Alcohol Electron Dot Diagram

    Hey chrisjj; This may help you - near the middle of the page. http://wulfenite.fandm.edu/Intro_to_Chem/formulas.htm Good luck. Steve
  2. S

    What Food Can I Bring to Prevent Osteoporosis?

    Try this; Google "osteoporosis" and click in the first reference, [PLAIN]www.FORE.org[/URL] Click on "treatment", then "eat right", then "calcium rich". That should take you to some recipies. Good luck. Steve
  3. S

    Molarity of a solution of silver perchlorate

    n108; Google "molarity", go to the first reference, and look at the equation on the top of the site. Good luck. Steve
  4. S

    How Many Half-Lives Equal a 1/8 Concentration Reduction?

    Yup; half of a half of a half = 1/2 x 1/2 x 1/2 = 1/8 Best of health. Steve
  5. S

    Solve Acid Base Titrations: 0.700-M KOH & 0.350-M H2SO4

    Go to Google, type in "titratiom end points" and look at the top reference. Think that will help you. Good luck. Steve
  6. S

    Physical or Chemical Changes? Classify These Reactions Without Prefixes!

    Hey Zappa; Go to your favorite search engine, type in "Sodium", choose a site, and see what it says about when Sodium is added to water. Good luck. Best of health. Steve
  7. S

    Compare Ions: 1 Mol Nickel (II) vs 1 Mol Copper (I)

    Think your two calculations should have the units of "ions/gm", not just "ions", after you cancel both "mole" units. This and chemisttree's info should lead you to the correct answer. Good luck. Steve
  8. S

    Reaction involving copper (II) sulfate pentahydrate

    "... and the contents of the beaker were dried." Maybe I'm wrong, but that statement doesn't say "heated", so perhaps the water of hydration wasn't driven off. Can anyone back me up or explain my error here? Gracias. Best of luck. Steve
  9. S

    Balancing Net Ionic Equation for Barium Fluoride Precipitate Formation

    "i'm not sure but i put. BaCl + NaF = BaF2 + NaCl2" Check your formulas for barium chloride and sodium chloride. Steve
  10. S

    Which molecule has two lone pairs on the central atom?

    Think you are correct. The three 3p3 electrons of P should be bonded to the three Cls, each one forming single bonds. That leaves the pair of 3s2 electons unshared. Haven't even looked at the other choices, since I feel PCl3 is the one. If incorrect, please someone let me know. Best of...
  11. S

    How Does Changing Pressure and Temperature Affect Gas Volume?

    Maybe I'm wrong, but I'd check your last step (multiplication & division) just before determining V2. Think you might be off by a factor of 10. I used the combined gas law: P1V1/T1 = P2V2/T2 and ended up with 1.13L Also, from the original conditions, isn't the P increasing and the T...
  12. S

    Understanding Principal Quantum Numbers for Sulfur and Arsenic Valence Electrons

    Google "quantum numbers and electron configurations". That should provide you with much info. Best of luck. Steve
  13. S

    Golgi Apparatus: Impact on Cell Functionality

    Go to your favorite search engine and type in "Golgi apparatus". You will find many references, explaining its functions. Should be easy from there on. Best of luck. Steve
  14. S

    PF3(CH3)2 Structure: Molecule & Properties

    Not sure the ratio of 3:5 bonds for P. Cannot comment on your compound. There are many, many more intelligent people at this site than I. Hybridization of orbitals might come into play here. Perhaps someone can correct/add to what has been said so far? I have a possible structure with the P...
  15. S

    PF3(CH3)2 Structure: Molecule & Properties

    P, at times, can have 5 bonds. Hope that helps. Steve
Back
Top