436 June 2006

 

  1. C
  2. B
  3. B
  4. C
  5. B
  6. D
  7. C
  8. B
  9. D

 

 

10.       X3Y     X = METAL; Y= NON-METAL

 

11.       Rp = 8 W

 

            Vp = 6(8) = 48 V

 

            Current for top branch = 48V/(24 W) = 2 A

            V1 = ItopR1 = 2(6) = 12 V

 

12.       Use VIt=mcDT

            T = 19 045 seconds = 5.3 h

 

13.      

volume

0.25 L

moles

n = CV= 0.175 moles

mass

27.7 g (multiply moles by molar mass)

 

14.       pH = 10          

 

15.       368 g (moles/92g N2O4)(3 N2O4/2 N2 )(28g N2/mole) = 168 g N2