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Hydrazine, N2H4 , reacts with oxygen to form nitrogen gas and water.
N2H4(aq)+O2(g)⟶N2(g)+2H2O(l) If 3.15 g of N2H4 reacts with excess oxygen and produces 0.950 L of N2 , at 295 K and 1.00 atm, what is the percent yield of the reaction?

Respuesta :

Neetoo

Answer:

Percent yield = 39.3%

Explanation:

Given data:

Mass of Nâ‚‚Hâ‚„ = 3.15 g

Volume of nitrogen produced = 0.950 L

Temperature = 295 K

Pressure = 1 atm

Percent yield = ?

Solution:

Chemical equation:

N₂H₄ + O₂   →   N₂ + 2H₂O

Number of moles of Nâ‚‚Hâ‚„:

Number of moles = mass/ molar mass

Number of moles = 3.15 g/32 g/mol

Number of moles = 0.1 mol

Now we will compare the moles of hydrazine and nitrogen.

                   N₂H₄             ;              N₂

                      1                 :                1

                   0.1                 :             0.1

PV = nRT

V = nRT/P

V = 0.1 mol ×0.0821 atm.L/mol.K ×295 K / 1 atm

V = 2.42 L

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield = 0.950 L/ 2.42 L × 100

Percent yield = 39.3%

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