Chemistry, 19.09.2019 20:00 ernestsbaby6181
Amass of 13.56 g for an unknown fuel was combusted in a reaction vessel containing an unknown amount of oxygen. at the end of the reaction, there still remained 13.52 g of the fuel as well as 0.0654 g of water and 0.1198 g of carbon dioxide. the oxygen was completely consumed during the reaction. how many molecules of oxygen gas were initially present in the reaction vessel
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8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm
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Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products
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