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the conservation of matter can be demonstrated by using chemical equati…

Question

the conservation of matter can be demonstrated by using chemical equations. which chemical equation demonstrates the conservation of matter?
2sn + 4hno₃ → sno₂ + 4no₂ + h₂o
i₂ + 5cl₂ + 6h₂o → 2hio₃ + 10hcl
cl + 4na → 4nacl
4p + 5hno₃ → 5no + 3h₃po₄

Explanation:

Step1: Check the number of atoms for each element in the first equation

  • For \(Sn\): Left - hand side has \(2\) atoms, right - hand side has \(1\) atom.
  • For \(H\): Left - hand side has \(4\) atoms, right - hand side has \(2\) atoms.
  • For \(N\): Left - hand side has \(4\) atoms, right - hand side has \(4\) atoms.
  • For \(O\): Left - hand side has \(12\) atoms (\(4\times3\) from \(HNO_3\)), right - hand side has \(2 + 8+1=11\) atoms (\(2\) from \(SnO_2\), \(8\) from \(4NO_2\) and \(1\) from \(H_2O\)).

Step2: Check the number of atoms for each element in the second equation

  • For \(I\): Left - hand side has \(2\) atoms (\(I_2\)), right - hand side has \(2\) atoms (\(2HIO_3\)).
  • For \(Cl\): Left - hand side has \(10\) atoms (\(5Cl_2\)), right - hand side has \(10\) atoms (\(10HCl\)).
  • For \(H\): Left - hand side has \(12\) atoms (\(6H_2O\)), right - hand side has \(2 + 10=12\) atoms (\(2HIO_3\) and \(10HCl\)).
  • For \(O\): Left - hand side has \(6\) atoms (\(6H_2O\)), right - hand side has \(6\) atoms (\(2HIO_3\)).

Step3: Check the number of atoms for each element in the third equation

  • For \(Cl\): Left - hand side has \(1\) atom, right - hand side has \(4\) atoms (\(4NaCl\)).

Step4: Check the number of atoms for each element in the fourth equation

  • For \(P\): Left - hand side has \(4\) atoms, right - hand side has \(3\) atoms (\(3H_3PO_4\)).
  • For \(H\): Left - hand side has \(5\) atoms (\(5HNO_3\)), right - hand side has \(9\) atoms (\(3H_3PO_4\)).
  • For \(N\): Left - hand side has \(5\) atoms (\(5HNO_3\)), right - hand side has \(5\) atoms (\(5NO\)).
  • For \(O\): Left - hand side has \(15\) atoms (\(5HNO_3\)), right - hand side has \(5 + 12=17\) atoms (\(5NO\) and \(3H_3PO_4\)).

Answer:

\(I_2 + 5Cl_2+6H_2O
ightarrow2HIO_3 + 10HCl\)