# Posts by sari

Total # Posts: 13

**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...

**Structure**

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

**math**

4/4+4/4=2

**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.

**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?

**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)

**chemistry lewis structure**

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

**chemistry lewis structure**

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

**algebra**

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

**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 ...

**Algebra**

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

**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 ...