Wetlands can play a significant role in removing fertilizer residues from rain r

Question

Wetlands can play a significant role in removing fertilizer residues from rain runoff and groundwater one way they do this is through denitrification, which converts nitrate ions to nitrogen gas: 2 NO^- _3 (aq) + 5 CO (g) + 2 H^+ (aq) rightarrow N_2 (g) + H_2 O (l) + 5 CO_2 (g) Suppose 170.0 g of NO^- _3 flows into a swamp each day. What volume of N_2 would be produced each day at 17 degree C and 1.00 atm if the denitrification process were complete? What volume of CO_2 would be produced each day? Suppose the gas mixture produced by the decomposition reaction is trapped in a container at 17 degree C; what is the density of the mixture assuming P_total = 1 00 atm? volume of N_2 volume of CO_2 density When holding the pressure constant, adding two gases together adds their volumes together. Make sure all of your units are appropriate, and pay attention to the stoichiometry of the reaction.

Explanation / Answer

mass of NO3- = 170 g

mol = mass/MW = 170/62.0049 = 2.741718 moles of NO3-

find N2 produced at T = 17°C = 290 K, P = 1 atm

2 mol of NO3 --> 1 molf of N2

2.741718 mols --> 2.741718/2 = 1.37085 mol of N2

PV = nRT

V = nrT/P = (1.37085)(0.082)(290)/(1) = 32.59 L

b)

find CO2

ratio is 1:5 so

32.59 L of N2 --> 32.59*5 = 162.95 L of CO2

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