Try the following web sites for practice on balancing chemical equations;
1. Jefferson Lab – try 5 “beginner”, 10 “intermediate” and 15 “advanced” level problems.
2. Mark Bishop’s Equation Balancing – 20 examples with “hints” if you need them.
3. Science Geek – 20, simple examples.
4. California State University – PLENTY of (harder) examples here. Some challenging.
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