Determine the heat of reaction value
The first step in the industrial production process is the oxidation of ammonia:
4 NH3 (g) + 5 O2 (g) yields 4 NO (g) + 6H2O (g). Determine the Heat of Reaction values:NH3 (g) = -45.9kJ; O2 (g) = 0 kJ; NO (g) =90.3 kJ; H2O (g) = -241.8 kJ
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Determine the age of a rock whose 40Ar/40Kratio is 1.25?(The half-life of 40K is 1.28 109years.) and calculate the age of a rock whose 40Ar/40Kratio is 1.25 where the half-life of 40K is 1.28 times 109years.
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