The combustion of ethylene proceeds by the reaction C2H4 (g) + ...

[rlane42]

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 disappearance of C2H4 is ________ M s-1.
 
  A) 0.087
  B) 0.043
  C) 0.39
  D) 0.20
  E) 0.26

Question 2

The temperature of a 11.8 g sample of calcium carbonate CaCO3 (s) increases from 24.8 C to 38.0 C. If the specific heat of calcium carbonate is 0.82 J/g-K, how many joules of heat are absorbed?
 
  A) 130 J
  B) 0.92 J
  C) -130 J
  D) -0.92 J
  E) 11 J

[chjcharjto14]

Answer to Question 1

B

Answer to Question 2

A

[rlane42]

Excellent

[pratush dev]

Gracias!