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September 3, 2015

Homework Help: ap chemistry

Posted by cheri on Wednesday, October 31, 2012 at 5:43pm.

Which of the following reactions as written
corresponds to a standard formation reaction?
1. 2H (g) + O2(g) ! H2O2 (`)
2. Na(s) +
1
2
Cl2(g) ! NaCl(s)
3. CO2(s) ! CO2(g)
4. SO2(g) +
1
2
O2(g) ! SO3(g)
5. 2 H2(g) + O2(g) ! 2 H2O(`)

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