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Science: Balancing Chemical Equations
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Science: Balancing Chemical Equations
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25 Questions

1. Ca(OH)₂ + CO₂ → Ca(HCO₃)₂

2. Ca₃(PO₄)₂ + H₂SO₄ → CaSO₄ + Ca(H₂PO₄)₂

3. S + N₂O → SO₂ + N₂

4. Zn(OH)₂ + NaOH → Na₂ZnO₂ + H₂O

5. H₂O₂ → H₂O + O₂

6. HgO → Hg + O₂

7. HNO₃ + P₂O₅ → N₂O₅ + HPO₃

8. CaSO₄ → CaS + O₂

9. __MgS + __O₂ → __MgO + __SO₂

10. SO₂ + H₂O → H₂SO₃

11. CaO + H₂O → Ca(OH)₂

12. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

13. H₃AsO₄ → As₂O₅ + H₂O

14. __CH₄ + __O₂ → __CO₂ + __H₂O

15. PCl₅ + H₂O → POCl₃ + HCl

16. CO₂ + NH₃ → OC(NH₂)₂ + H₂O

17. SiO₂ + Na₂CO₃ → Na₂SiO₃ + CO₂

18. N₂ + H₂ → NH₃

19. __C + __O₂ → __CO₂

20. NaOH + FeSO₄ → Na₂SO₄ + Fe(OH)₂

21. __BaCl₂ + __Na₂SO₄ → __NaCl + __BaSO₄

22. KHSO₄ → K₂S₂O₇ + H₂O

23. CaCO₃ → CaO + CO₂

24. Ca(ClO₃)₂ → CaCl₂ + O₂

25. H₂CO₃ → H₂O + CO₂

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