2Sn + 4HNO_{3} -> SnO_{2} + 4NO_{2} + H_{2}O I_{2} + 5Cl_{2} + 6H_{2}O -> 2HIO_{3} + 10HCl Cl + 4Na -> 4NaCl 4P + 5HNO_{3} -> 5NO + 3H_{3}PO_{4}
I gave my students this multiple choice question: The conservation of matter can be demonstrated by using chemical equations. Which chemical equation demonstrates the conservation of matter?

Only one answer is correct among these 4 choices:
- 2Sn + 4HNO_{3} -> SnO_{2} + 4NO_{2} + H_{2}O
- I_{2} + 5Cl_{2} + 6H_{2}O -> 2HIO_{3} + 10HCl
- Cl + 4Na -> 4NaCl
- 4P + 5HNO_{3} -> 5NO + 3H_{3}PO_{4}

Could you tell me which one is correct?

I_{2} + 5Cl_{2} + 6H_{2}O -> 2HIO_{3} + 10HCl