Which of the following process is not a redox reaction? A. Formation of ammonium sulphate from ammonia and sulphuric acid
B. Formation of nitrogen monoxide from ammonia
C. Formation of sulphuric acid from sulphur
D. Formation of zinc from zinc sulphide

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

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Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?