Volcanoes emit much hydrogen sulfide gas, H2S, which reacts with the oxygen in t

Question

Volcanoes emit much hydrogen sulfide gas, H2S, which reacts with the oxygen in the air to form water and sulfur dioxide, SO2. Every 73 tons of H2S reacts with 103 tons of oxygen and forms 39 tons of water. How many tons of SO2 are formed?

Explanation / Answer

2H2S + 3O2 ------> 2H2O + 2SO2 Molar mass of H2S = 2 * 1 + 32 = 34 g / mol Molar mass of O2 = 32 g / mol Molar mass of H2O = 2 * 1 + 16 = 18 g / mol Molar mass of SO2 = 32 + 2 * 16 = 64 g / mol According to the Equation , 2*34 g of H2S reacts with 3*32 g of O2 Or 2*34 tons of H2S reacts with 3*32 tons of O2 X tons of H2S reacts with 103 tons of O2 X = ( 2*34*103 )/( 3*32) = 72.958 tons of H2S ----------------------------------------------------------------- 3*32 g of O2 upon reaction produces 2*64 g of SO2 OR 3*32 tons of O2 upon reaction produces 2*64 tons of SO2 103 tons of O2 upon reaction produces Y tons of SO2 Y = ( 2*64*103) / ( 3*32) = 137.33 tons of SO2

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