Posts by sari

Total # Posts: 13

  1. Econ Help if you can :P

    Approximately 14 million Americans are addicted to drugs and alcohol. The federal government estimates that these addicts cost the U.S. economy $300 billion in medical expenses and lost productivity. Despite the enormous potential market, many biotech companies have shied away...
  2. Structure

    no one would have attended the lecture if you told truth about the guest speaker
  3. math

    4/4+4/4=2
  4. Math11

    A model airplane is made on a scale of 1:128. A)What is the scale factor of the model? B)If the airplane has a wingspan of 30 cm, what is the wingspan of the actual airplane Need help on this.
  5. Scale Representations

    A model airplane is made on a scale of 1:128. A)What is the scale factor of the model? B)If the airplane has a wingspan of 30 cm, what is the wingspan of the actual airplane?
  6. chemistry

    In a titration experiment, 22.00mL of a NaOH solution are required to neutralize 24.02 mL of a 0.1094 M HCL solution. what is the molarity of H+ in the HCL solution? (same as the molarity of HCL)
  7. chemistry lewis structure

    help me please! dram the lewis structure of CNO - explain me please! thanks
  8. chemistry lewis structure

    please help me i don't know how to do this! Draw the lewis structure for: SiO3 -2
  9. algebra

    Find all positive solutions to x^7 - 5x^4 = 3x^2 - 10
  10. chemistry

    What mass of CO2, a greenhouse gas, is produced per liter of each fuel (assuming complete combustion) I got this data density of ethanol = 0.785 g/mL density of octane = 0.699 g/mL Ethanol) C2 H5 OH + 2O2 -> 2CO2 + 3H2O delta H combustion ethanol = -1234.8 Kj/mol Octane) ...
  11. chemistry

    1) MgO (s) + 2H (aq) -> Mg+2 (aq) + H2O (l) 2) Mg+2 (aq) + H2 (g)-> Mg(s) + 2H+ (l) 3) equation 1+ equation 2 = MgO (s) + H2 (g) -> Mg (s) + H2O (l) is it correct? if so, i need to write an expression which could be used to obtain the heat of formation of magnesium ...
  12. Algebra

    4(7x-1)=3(2x+1)-4(x+6) x=?
  13. Please Help, Physics

    1 A runner dashes from the starting line (x = 0) to a point 130 m away and then turns around and runs to a point 11 m away from the starting point in 21 seconds. To the nearest tenth of a m/s what is the average speed? 2 What is the runner's average velocity in the ...