| 31. | Another product of waterlogging is the increase of sulfide in soil.
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| 32. | Underneath, clouds of ammonia and hydrogen sulfide may be found.
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| 33. | In general, the sulfides of cobalt are black, nonstoichiometric.
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| 34. | They react with strong acids to release hydrogen sulfide gas again.
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| 35. | Hydrogen sulfide at 400 �C produces uranium ( IV ) sulfide.
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| 36. | Hydrogen sulfide at 400 �C produces uranium ( IV ) sulfide.
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| 37. | It can also be produced directly using the Girdler sulfide process.
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| 38. | It occurs naturally as the sulfide mineral greigite and is magnetic.
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| 39. | Cinnabar itself is a mercuric sulfide mineral occurring in red crystals.
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| 40. | The low grade sulfide ore contributes 19 % of recoverable copper.
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