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Tamiku [17]
3 years ago
11

4NH3 + 502 --> 4NO + 6H20

Chemistry
1 answer:
gregori [183]3 years ago
7 0

Answer:

5.52 g

Explanation:

  • 4NH₃ + 5O₂ → 4NO + 6H₂O

First we <u>convert the given masses of both reactants into moles</u>, using their <em>respective molar masses</em>:

  • 6.30 g NH₃ ÷ 17 g/mol = 0.370 mol NH₃
  • 1.80 g O₂ ÷ 32 g/mol = 0.056 mol O₂

Now we <u>calculate with how many NH₃ moles would 0.056 O₂ moles react</u>, using the<em> stoichiometric coefficients</em>:

  • 0.056 mol O₂ * \frac{4molNH_3}{5molO_2} = 0.045 mol NH₃

As there more NH₃ moles than required, NH₃ is the excess reactant.

Then we calculate how many NH₃ moles remained without reacting:

  • 0.370 mol NH₃ - 0.045 mol NH₃ = 0.325 mol NH₃

Finally we convert NH₃ moles into grams:

  • 0.325 mol NH₃ * 17 g/mol = 5.52 g
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