Ch. 5, 11, 6 conversion factor, light, moles     test    [60 points]             Honors Chemistry

For problems involving calculations, show the relevant equation (or formula, and conversion factor(s)), show your work in an organized manner, put the proper units in your calculations / answer, have the proper number of significant figures in your answer.

1. conversion factor [10 points]

a. 75 nm = ___ m

b. 360. mm2 = / minutes = __ cm2 / seconds

 

2. light [10 points]

a. what is the frequency of light with a wave length of 875 mm ?

b. what is the energy of a photon of light with a wave length of 65 cm ?

 

3. spectroscopy [10 points]

a. sketch & label an atom’s electron energy level diagram.

b. on the above diagram, draw 3 arrows that corresponds to the emission of light.

c. on the above diagram, label each arrow that corresponds to the emission of green, ultraviolet, and infared light.

 

4. moles [10 moles]

a. 95.7 g carbon dioxide = __ moles carbon dioxide

b. 7.5 millimoles of water = __ g of water

 

5. A compound (its molar mass = 222 g / mole) contains

48.65 % carbon

8.11 % hydrogen

43.24 % oxygen

Determine the compound’s chemical formula. [15 points]

 

6. describe the basis of least-square regression analysis. [5 points]