In balancing a chemical equation, you cannot subtract the number of atoms from one side to the other. Instead, you need to adjust the coefficients (the numbers in front of the chemical formulas) to ensure that the number of atoms for each element is equal on both sides of the equation.
Here’s a general process to follow when balancing a chemical equation:
- Write the unbalanced equation.
- List the number of atoms of each element on both sides (reactants and products).
- Adjust coefficients to balance one element at a time. Start with the most complex molecule if possible.
- Continue adjusting coefficients for other elements until all elements are balanced.
- Check your work to ensure that the number of atoms for each element is the same on both sides.
For example, to balance the equation for the combustion of methane:
Unbalanced equation: \[ \text{CH}_4 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \]
Balanced equation: \[ \text{CH}_4 + 2 \text{O}_2 \rightarrow \text{CO}_2 + 2 \text{H}_2\text{O} \]
In this case, you used coefficients (2) to ensure that the atoms of oxygen are balanced, rather than attempting to subtract atoms from one side.
If you have a specific equation you're trying to balance, feel free to share it, and I can help guide you through the balancing process!
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