When the following reaction is balanced the coefficient in front ...

[EAugust]

When the following reaction is balanced the coefficient in front of oxygen is:
 
  ____ C8H18 + ____ O2  ____ CO2 + ____ H2O
 
  A) 25
  B) 12
  C) 18
  D) 9

Question 2

When the following reaction is balanced the coefficient in front of carbon dioxide is:
 
  ____ C5H12 + ____ O2  ____ CO2 + ____ H2O
 
  A) 5
  B) 6
  C) 12
  D) 10

Question 3

What is the ideal angle between the H-C-H bond in methane?
 
  A) 120
  B) 109.5
  C) 180
  D) 90
  E) none of the above

[peilian]

Answer to Question 1

A

Answer to Question 2

A

Answer to Question 3

B

[EAugust]

Thank you!

[peilian]

Always glad to help...