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Mathematics 22 Online
OpenStudy (anonymous):

2. In which of the following reactions do four total molecules of reactants produce two total molecules of products? (Points : 3) N2 + 3H2 2NH3 SnO2 + 2H2 Sn + 2H2O 2H2S + 3O2 2SO2 + 2H2O 2SO2 + O2 2SO3

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