Question

Write and balance the equation for the complete combustion of acetylene, C2H2. Phase symbols and energy changes are optional.

Answer 1

$C_2H_2\ +O_2\to CO_2\ +H_2O\\balancing\ carbon\\2C_2H_2\ +O_2\ \to4CO_2\ +H_2O$

$Balancing\ hydrogen\\2C_2H_2\ +O_2\to4CO_2\ +2H_2O\\balancing\ oxygen\\2C_2H_2\ +5O_2\to4CO_2+ 2H_2O\\it \ is \ the \ balanced\ equation$