Review Quiz #4

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. A dianion with 12 protons will have ___ electrons.

 
 
 
 
 

2. Make the following conversion:  32.0 lb/in2 = _____ kg/m2
 (2.2 lbs = 1 kg and 1 meter = 3.28 feet)

 
 
 
 
 

3. To make 100 mL of aqueous 0.20 M glucose, water should be added to _____ grams glucose until 100 mL of solution is obtained.   (Note: glucose MW = 180)

 
 
 
 
 

4. What volume of 1.50 M HCl should be added to neutralize 500. mL of 1.00 M NaOH?
(Recall that HCl  +  NaOH  —>  H2O  +  NaCl)

 
 
 
 
 

5. Which atom has the highest propensity for releasing an electron (e.g. loses an electron most easily)?

 
 
 
 
 

6. Calculate the mass of 25.0 mL CHCl3 at 25 °C.
(density = 1.489 g/mL)

 
 
 
 
 

7. Hydrogen adds to compounds having double or triple bond as follows: H2C=CH +  H2  —>  H3C-CH3    (comment: a catalyst is needed!). Which is the limiting reagent if 28 grams of H2C=CH2 is reacted with 10 grams of H2 using a Pt catalyst?

 
 
 
 
 

8. A 1.1 M solution KOH (aq) has this number of K+ cations per mL:

 
 
 
 
 

9. How many O atoms are in Cr2(SO4)3?

 
 
 
 
 

10. Which atom has 5 electrons in the 2p orbitals?

 
 
 
 
 

11. What is your current status?