The combustion of ammonia in the presence of oxygen yields NO2 ...

[cartlidgeashley]

The combustion of ammonia in the presence of oxygen yields NO2 and H2O: 4 NH3 (g) + 7O2 (g)  4 NO2 (g) + 6 H2O (g) The combustion of 43.9 g of ammonia with 258 g of oxygen produces ________ g of NO2.
 
  A) 212
  B) 178
  C) 119
  D) 0.954
  E) 43.9

Question 2

A 25.0 mL sample of a solution of a monoprotic acid is titrated with a 0.115 M NaOH solution. The titration curve above was obtained. The concentration of the monoprotic acid is about ________ mol/L.
 
  A) 25.0
  B) 0.0600
  C) 0.240
  D) 0.120
  E) 0.100

[chinwesucks]

Answer to Question 1

C

Answer to Question 2

D