Chemistry, 30.09.2019 08:30 ayalat9596
Athief plans to steal a gold sphere with the radius of 28.9cm from a museum. if the gold has a density of 19.3 g/cm^3 what is the mass of the sphere in pounds? (volume of a sphere is v= (4/3) pi r^3) is the thief likely to be able to walk off with gold sphere unassisted?
Answers: 1
Chemistry, 21.06.2019 17:10
Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .
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Compare and contrast physical changes with chemical changes.
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Athief plans to steal a gold sphere with the radius of 28.9cm from a museum. if the gold has a densi...
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