Exam 1 (3)

1.  Gas is sold for $1.399 per liter in Toronto, Canada. Your car needs 12.00 gallons. How much will your credit card be charged in Canadian dollars?        

1. $4.44
2. $63.54
3. $67.15
4. $16.79

2.    An alligator is 152.4 cm long. How long is he in feet?            

1. 720.0 ft
2. 12.7 ft
3. 5.00 feet
4. 32.2 ft
5. 60.0 ft

3.    Define potential energy.            

1.  energy associated with the force of an object 
2. energy associated with the position or composition of an object
3. energy associated with the temperature of an object
4. energy associated with the gravity of an object
5. energy associated with the motion of an object

4.   Give the number of protons in P -3.          

1. 12
2. 15
3. 19
4. 16
5. 18

5. How many moles are in 2.16 x 10 24 atoms of lead?        

1. 3.59 moles
2. 0.359 moles
3. 1.79 moles
4. 6.08 moles
5. 35.9 moles

6.   Which of the following statements about subatomic particles is TRUE?            

1. A neutral atom contains the same number of protons and electrons. 
2. Electrons make up most of the mass of an atom.
3. Protons have about the same mass as electrons. 
4. Protons and neutrons have opposite, but equal in magnitude, charges. 
5. Neutrons and electrons are found in the nucleus of an atom.

7.   What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest, whole-number coefficients?  
_____ C 2H 6O  ( l) + _____ O 2( g) → _____ CO 2( g) + _____ H 2O( l)            

1.  9
2.  7
3. 3   
4. 5

8.   According to the balanced equation shown below, 4.00 moles of oxalic acid, H 2C 2O 4, reacts with __________ moles of permanganate, MnO 4 -.  
5 H 2C 2O 4( aq) + 2 MnO 4 -( aq) + 6 H +( aq) → 10 CO 2( g) + Mn 2+( aq) + 8 H 2O( l)      

1. 1.60
2. 8.00
3. 9.00
4. 4.00

9.   How many moles of PCl 3 contain 3.68 × 10 25 chlorine atoms?      

1. 54.5 moles PCl3
2. 16.4 moles PCl3
3. 61.1 moles PCl3
4. 20.4 moles PCl3
5. 49.1 moles PCl3

10.   A student prepared a stock solution by dissolving 10.0 g of KOH in enough water to make 150. mL of solution. She then took 15.0 mL of the stock solution and diluted it with enough water to make water to make 65.0 mL of a final solution. What is the concentration of KOH for the final solution?    

1. 0.356 M
2. 3.65 M
3. 2.81 M
4. 0.274 M