The combustion of ammonia in the presence of excess oxygen yields ...

[yoroshambo]

The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:
 
  4 NH3 (g) + 7O2 (g)  4 NO2 (g) + 6 H2O (g)
 
  The combustion of 14.4 g of ammonia consumes ________ g of oxygen.
  A) 13.5
  B) 28.8
  C) 54.1
  D) 47.3
  E) 94.6

Question 2

The photoelectric effect is ________.
 
  A) the total reflection of light by metals giving them their typical luster
  B) the production of current by silicon solar cells when exposed to sunlight
  C) the ejection of electrons by a metal when struck with light of sufficient energy
  D) the darkening of photographic film when exposed to an electric field
  E) a relativistic effect

[fromAlphatoOmega22]

Answer to Question 1

D

Answer to Question 2

C

[yoroshambo]

Gracias!

[mohan]

Thanks for the timely response, appreciate it