O 2/2/2017 11:55 PM A 18.4/20 1/28/2017 10:49 AM Gradebook Print calculator Peri
ID: 479127 • Letter: O
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O 2/2/2017 11:55 PM A 18.4/20 1/28/2017 10:49 AM Gradebook Print calculator Periodic Table Question 16 of 16 Incorrect Map Sapling Learning macmillan learning Hydrazine, N2H4, may react with oxygen to form nitrogen gas and water N, g) 2H,O If 3.25 g of N2H4 reacts and produces 0.950 L of N2, at 295 K d 1.00 atm, what is the percent yield of the reaction? Number 0.4 Previous Give Up & View Solution Try Again Next Exit Y Explanation Percent yield can be expressed as the following relation. actual percent yield x 100 n theoretical Find the theoretical yield from the reaction stoichiometry. Find the actual moles of N2 from the ideal gas equation.Explanation / Answer
calculate the moles of N2 formrd from given data
PV = nRT
n = PV /RT = (1.0 x 0.95 / 0.0821 x 295) = 0.95 / 24.2195 = 0.039
now from the balanced reaction
32.04 g N2H4 gives 1 mole of N2
3.25 g N2H4 must form 3.25 / 32.04 = 0.101
% yield = (0.039 / 0.101) x 100
% yield = 38.6
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