Review Quiz #2

Comment: Provide ALL correct answers for each problem.

The quizzes become increasingly more interesting. This quiz should take you about 20 minutes if you have good preparation. If you have difficulty with these topics, we STRONGLY recommend that you review the videos that we have listed.

Please remember, you are allowed a calculator AND a periodic table!

1. Considering significant figures, what is the correct answer for 6.546 – 1.21 = ?

 
 
 
 
 

2. Convert 456 nm to meters (note: 1 nm = 10-9 m)

 
 
 
 
 

3. For a 0.20 M aqueous glucose solution, 3.21 mL = ______ grams of glucose (glucose MW = 180 g/mole)

 
 
 
 
 

4. Make this conversion: 3.28 x 103 cm-1 =  ____ nm-1
(100 cm = 1 m;  109 nm = 1 m; comment: the units are in the denominators!)

 
 
 
 
 

5. Considering significant figures, what is the correct answer for 1.200 x 0.0060 = ?

 
 
 
 
 

6. How many moles of hydrogen are in 56 ng water? (water density = 1.0 g/mL; 1 g = 109 ng;  Atomic weights: H = 1; O = 16)

 
 
 
 
 

7. Determine the indicated coefficients for this combustion reaction:

__i_C6H12O +  __ii__O2  —>   ___iii__CO2   +   __iv___H2O

 
 
 
 
 

8. If 13 grams of acetylene (C2H2) were consumed in a combustion reaction (see below), how many moles of CO2 would be formed? (Atomic weights: C = 12; O = 16; H = 1)

2C2H2  +  5O2  —>  4CO2  +  2H2O

 
 
 
 
 

9. Determine the coefficients of this RedOx reaction:

_i___Cl2 +  __ii_Fe°  —>   __iii_ FeCl3

 
 
 
 
 

10. What is the mass of oxygen in 10 grams of glucose (C6H12O6; MW = 180 g/mole)?

 
 
 
 
 

11. What is your current status?