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Ammonia nh3 chemically reacts with oxygen gas o2 to produce nitric oxide no and water h2o . what mass of water is produced by the reaction of 8.45g of oxygen gas? round your answer to 3 significant digits.

Respuesta :

Edufirst
1) Balanced chemical reaction

4NH3 + 5O2 ---> 4NO + 6H2O

2) Molar ratios

4 mol NH3 : 5 mol O2 : 4 mol NO : 6 mol H2O

3) Convert 8.45 g of O2 to moles

moles = mass in grams / molar mass = 8.45 g / 32.0 g/mol = 0.264 mol O2

4) Proportion

5 mol O2 / 6 mol H2O = 0.264 mol O2 / x

=> x = 0.264 mol O2 * 6 mol H2O / 5 mol O2 = 0.3168 mol H2O

5) Convert 0.3168 mol H2O in grams

mass = molar mass * number of moles

molar mass H2O = 18.0 g/mol

mass = 18.0 g/mol * 0.3168 mol = 5.7024 g ≈ 5.70 g

Answer: 5.70 g

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