Problem: Chemistry of Volcanic Gases: Balance the following reactions that occur among volcanic gases. Place coefficient directly in front of the compound, leaving no spaces.3SO2(g) + 3O2(g) → 2SO3(g)H2S(g) + O2(g) → SO2(g) +H2O(g)H2S(g) +SO2(g) → S8(s) +H2O(g)

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Balance the following reactions that occur among volcanic gases


SO2(g) + O2(g) → SO3(g)

Balance O

SO2(g) +  1/2 O2(g) → SO3(g)

Make coefficient whole numbers by multiplying 2.

[SO2(g) +  1/2 O2(g) → SO3(g)] x 2


The balanced reaction is: 

SO2(g) + O2(g) → 4 SO3(g)


H2S(g) + O2(g) → SO2(g) +H2O(g)

Balance O

H2S(g) + 3/2 O2(g) → SO2(g) +H2O(g)

Make coefficient whole numbers by multiplying 2.

[H2S(g) + 3/2 O2(g) → SO2(g) +H2O(g)] x 2


The balanced reaction is: 

 H2S(g) + 3 O2(g) →2 SO2(g) +H2O(g)


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Problem Details

Chemistry of Volcanic Gases: Balance the following reactions that occur among volcanic gases. Place coefficient directly in front of the compound, leaving no spaces.

3SO2(g) + 3O2(g) → 2SO3(g)

H2S(g) + O2(g) → SO2(g) +H2O(g)

H2S(g) +SO2(g) → S8(s) +H2O(g)