The heavier noble gases are more reactive than the lighter ones ...

[EAugust]

The heavier noble gases are more reactive than the lighter ones because ________.
 
  A) the lighter noble gases exist as diatomic molecules.
  B) the lighter noble gases have complete octets.
  C) the heavier noble gases are more abundant.
  D) the heavier noble gases have low ionization energies relative to the lighter ones.
  E) the heavier noble gases have greater electron affinities.

Question 2

The combustion of ethylene proceeds by the reaction C2H4 (g) + 3O2 (g)  2CO2 (g) + 2H2O (g) When the rate of disappearance of O2 is 0.13 M s-1, the rate of appearance of CO2 is ________ M s-1.
 
  A) 0.087
  B) 0.043
  C) 0.39
  D) 0.20
  E) 0.26

Question 3

How many significant figures are in the number 4001?
 
  A) 3
  B) 4
  C) 5
  D) 6
  E) 7

[missalyssa26]

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[EAugust]

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[missalyssa26]

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