# sari

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
2. ## Structure

no one would have attended the lecture if you told truth about the guest speaker
3. ## 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.
4. ## 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?
5. ## 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)
6. ## chemistry lewis structure

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

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

Find all positive solutions to x^7 - 5x^4 = 3x^2 - 10
9. ## 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
10. ## 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
11. ## Algebra

4(7x-1)=3(2x+1)-4(x+6) x=?