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Author Question: Oxygen forms an ion with a charge of ________. A) 2- B) 2+ C) 3- D) 3+ E) ... (Read 131 times)

D2AR0N

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Oxygen forms an ion with a charge of ________.
 
  A) 2-
  B) 2+
  C) 3-
  D) 3+
  E) 6+

Question 2

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide:
 
  4Al (s) + 3O2 (g)  2Al2O3 (s)
 
  The maximum amount of Al2O3 that can be produced from 2.5 g of Al and 2.5 g of O2 is ________ g.
  A) 9.4
  B) 7.4
  C) 4.7
  D) 5.3
  E) 5.0

Question 3

At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen:
 
  2N2O5(g)  4NO2 (g) + O2 (g)
 
  When the rate of formation of O2 is 2.2  10-4 M/s, the rate of decomposition of N2O5 is ________ M/s.
  A) 7.2  10-3
  B) 3.6  10-3
  C) 1.8  10-3
  D) 1.4  10-2
  E) 0.00090

Question 4

What is the maximum amount in grams of SO3 that can be produced by the reaction of 1.0 g of S with of O2 via the equation below? S (s) + O2 (g)  SO3 (g) (not balanced)
 
  A) 0.27
  B) 1.7
  C) 2.5
  D) 3.8
  E) 2.0

Question 5

The pH of a solution prepared by dissolving 0.350 mol of solid dimethylamine hydrochloride ((CH3 )2NH2Cl) in 1.00 L of 1.10 M dimethylamine ((CH3 )2NH) is ________. The Kb for methylamine is 5.40  10-4. (Assume the final volume is 1.00 L.)
 
  A) 1.66
  B) 2.77
  C) 11.23
  D) 11.14
  E) none of the above


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Bison

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D2AR0N

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  • Posts: 561
Reply 2 on: Aug 27, 2018
Excellent


irishcancer18

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Reply 3 on: Yesterday
Gracias!

 

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