Question

How to balance a bracket chemical equation 0?

Answer 1

Answer:

Parentheses are useless in a chemical formula if they don't have a subscript, so we'll assume one is always there. In such a formula, the subscript outside the parentheses means that to count atoms, you must multiply that subscript by the numbers of atoms inside. Here's an example.

Answer 2

_ C2H2 + _ O2 -> _ CO2 + _ H2O

Balance all the other elements first and leave oxygen (O2) for last as it is just a single element.

2 C2H2 + _ O2 -> 4 CO2 + 2 H2O

2 C2H2 + 10 O2 -> 4 CO2 + 2 H2O