Other Chemistry Answers

1. A flea is located 3.0 cm from convex spherical mirror whose radius of curvature is 8.0 cm. Where is the image of the flea?
2. An object is placed 2.0 cm in front of a concave spherical mirror whose radius of curvature is 8.0 cm. Use the mirror equation to locate the position of the image and its size.
3. a coin 2.0 cm in diameter is held 20 cm in front of a concave spherical mirror of 30 cm radius of curvature. Locate the image of the coin and its height.

1. For the gaseous reaction: 2NO + 2H2 N2 + 2H2O The following data at 1100K were obtained: 

Reactant Concentrations 

[ NO] 

5.0 x 10 -3 

15.0 x 10 -3 

15.0 x 10 -3 

[H2] 

2.0 x 10 -3 

2.0 x 10 -3 

4.0 x 10 -3 

Rate of reaction 

(mol / L. s )

2.4 x10 -5

2.2 x10 -4

4.4 x10 -4

a. Write the rate equation for the reaction. 

b. What is the order of reaction? 

b.1. with respect to NO ______________ 

b.2. with respect to H2 ______________ 

b.3. overall order of reaction __________ 

c. Calculate the rate constant for the reaction at 1100K 

d. Calculate the rate in mol/L. s at 1100K at the instant when [NO] = 2.10 x 10 -3 and 

[H2] = 2.50 x 10 -3  

Which ion has the most shells that contain electrons ?

Al 3+ , Be 2+ , N 3-

5. A gas expands adiabatically and reversibly. What is its change in entropy? Explain and show your answers mathematically.

-

Gas Law- please help!!!

In a mixture of carbon dioxide and oxygen, 40.0% of the gas pressure is exerted by oxygen. If the total pressure is 115 mmHg, what is the pressure of the carbon dioxide in

atm?

Please show work so i can understand!

A ball was kicked horizontally off a cliff at 15 m/s, how high was the cliff if the ball landed 83 m from the base of the clif

Question:

Lomefloxacin (molar mass 351.3g/mole), strongest base pKa is 8.78 and it’s strongest acid pKa is 5.45. At pH 3 Lomefloxacin solubility is 109.3mg/mL.

Determine the minimum solubility of Lomefloxacin to 1 d.p. Express the minimum solubility as a molarity.