Question

which equation shows a chemical reaction that involves 6 atoms of carbon? click to highlight the equation 2co + 2h2o → ch4 + 2o2 3co2 + 3h2o → c3h6o3 + 3o2 ch4 + 2o2 → co2 + 2h2o 2c + o2 → 2co

Explanation:

Step1: Analyze first equation

In $2CO + 2H_2O
ightarrow CH_4+2O_2$, the number of carbon atoms on the left - hand side is 2 (from 2CO), not 6.

Step2: Analyze second equation

In $3CO_2+3H_2O
ightarrow C_3H_6O_3 + 3O_2$, the number of carbon atoms on the left - hand side is 3 (from 3$CO_2$), not 6.

Step3: Analyze third equation

In $C_6H_{12}+9O_2
ightarrow6CO_2 + 6H_2O$, on the left - hand side, in $C_6H_{12}$, there are 6 carbon atoms. And on the right - hand side, in 6$CO_2$, there are also 6 carbon atoms (6×1 = 6).

Step4: Analyze fourth equation

In $2C+O_2
ightarrow2CO$, the number of carbon atoms on the left - hand side is 2 (from 2C), not 6.

Answer:

$C_6H_{12}+9O_2
ightarrow6CO_2 + 6H_2O$