How Do You Calculate the Mass of Water Produced in a Chemical Reaction?

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SUMMARY

The calculation of the mass of water produced in a chemical reaction involving ammonia (NH3) and oxygen (O2) requires understanding limiting and excess reactants. In the reaction NH3 + O2 --> NO2 + H2O, the stoichiometric ratios indicate that one mole of ammonia reacts with one mole of oxygen. Given 10 g of ammonia and 5 g of oxygen, the limiting reactant is oxygen, which determines the maximum amount of water produced. Proper mole conversions and molar mass calculations are essential for accurate results.

PREREQUISITES
  • Understanding of stoichiometry in chemical reactions
  • Knowledge of mole conversions and molar mass calculations
  • Familiarity with limiting and excess reactants
  • Basic principles of chemical equations and reaction coefficients
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  • Learn how to perform mole conversions for various substances
  • Study stoichiometric calculations in chemical reactions
  • Explore the concept of limiting and excess reactants in detail
  • Practice calculating the mass of products from given reactants using balanced equations
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Chemistry students, educators, and anyone involved in chemical engineering or laboratory work who needs to understand reaction yields and stoichiometric principles.

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i have no idea how to do excess and limiting (mole conversions) does this concept even apply to this Question and how to figure out this out?
if 10 g of ammonia gas reacted with 5 g of Oxygen gas, what mass of water is produced? using this eqn: NH3 + O2 --> NO2 + H2O
 
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Figure out how many moles of each substance you have (molar masses).
Then look at your stoichiometric ratios, your equation tells you for every mole of ammonia, one mole of oxygen gas will react. This is given directly from the coefficients of each of the reactants.

If you have X moles of oxygen gas and Y moles of ammonia, then what is the maximum amount you can react if X < Y? Highlight for answer:
X moles, because once you've used up X moles, you have some Y moles left over that have nothing to react with.

Be careful when calculating the mass of oxygen.
 

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