Which of the following equations if correctly balanced?(1 point)

Question

Responses

C8H8+3O2→3CO2+4H2O
cap c sub 8 cap h sub 8 plus 3 cap o sub 2 rightarrow 3 cap c cap o sub 2 plus 4 cap h sub 2 cap o

C8H8+4O2→3CO2+3H2O
cap c sub 8 cap h sub 8 plus 4 cap o sub 2 rightarrow 3 cap c cap o sub 2 plus 3 cap h sub 2 cap o

C8H8+2O2→CO2+4H2O
C8H8+2O2→CO2+4H2O

C8H8+5O2→3CO2+4H2O
cap c sub 8 cap h sub 8 plus 5 cap o sub 2 rightarrow 3 cap c cap o sub 2 plus 4 cap h sub 2 cap o

Answer 1

To determine which equation is balanced, we need to check the number of atoms of each element on both sides of the equation.

1. Equation 1: $C_8{H}_8+3O_2\to 3C{O}_2+4H_{2}O$

   • Left side:
     • C: 8
     • H: 8
     • O: 3 × 2 = 6
   • Right side:
     • C: 3 × 1 = 3
     • H: 4 × 2 = 8
     • O: 3 × 2 + 4 × 1 = 6
   • Not balanced (C is not balanced).

2. Equation 2: $C_8{H}_8+4O_2\to 3C{O}_2+3H_{2}O$

   • Left side:
     • C: 8
     • H: 8
     • O: 4 × 2 = 8
   • Right side:
     • C: 3 × 1 = 3
     • H: 3 × 2 = 6
     • O: 3 × 2 + 3 × 1 = 9
   • Not balanced (C and O are not balanced).

3. Equation 3: $C_8{H}_8+2O_2\to C{O}_2+4H_{2}O$

   • Left side:
     • C: 8
     • H: 8
     • O: 2 × 2 = 4
   • Right side:
     • C: 1
     • H: 4 × 2 = 8
     • O: 1 × 2 + 4 × 1 = 6
   • Not balanced (C and O are not balanced).

4. Equation 4: $C_8{H}_8+5O_2\to 3C{O}_2+4H_{2}O$

   • Left side:
     • C: 8
     • H: 8
     • O: 5 × 2 = 10
   • Right side:
     • C: 3 × 1 = 3
     • H: 4 × 2 = 8
     • O: 3 × 2 + 4 × 1 = 10
   • Not balanced (C is not balanced).

After checking all four equations, none of them are correctly balanced.

The correct balanced equation for the combustion of octane $C_8{H}_8$ should be: $$C_8{H}_8+9O_2\to 8C{O}_2+4H_{2}O$$

If all four equations provided are the only options, then none of them are balanced.