Balancing Equations: 2H2 + O2 -> 2H2O - 180g of Water Produced

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Discussion Overview

The discussion revolves around a homework problem involving the reaction of dihydrogen and dioxygen to produce water. Participants are exploring the stoichiometry of the reaction, specifically how to calculate the mass of water produced from given masses of reactants.

Discussion Character

  • Homework-related
  • Mathematical reasoning

Main Points Raised

  • One participant presents a calculation suggesting that 20.0 g of dihydrogen and 20.0 g of dioxygen would yield 180 g of water, based on their interpretation of the balanced equation.
  • Another participant questions the feasibility of producing 180 g of water from only 40 g of reactants, implying a potential misunderstanding of mass conservation.
  • A participant suggests starting calculations with oxygen to explore the problem from a different angle.
  • Another participant emphasizes the importance of identifying the limiting reagent in the reaction.
  • Some participants express frustration regarding the use of specific terminology, indicating a desire to avoid leading hints in the discussion.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the calculations or the approach to solving the problem. Multiple competing views remain regarding the correct method to determine the mass of water produced.

Contextual Notes

There is an implicit assumption regarding the completeness of the reaction and the definitions of limiting reagents, which are not fully explored in the discussion.

draotic
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Homework Statement


if 20.0 g of dihydrogen is reacted with 20.0 g of dioxygen , how many grams of water is produced?


Homework Equations





The Attempt at a Solution


balancing
2H2 + O2 = 2H20
now 2 mole h2 gives 2mole H2O
so 20/2 moles of H2 will give 10 moles H2O
10 x 18 = 180 g
...
am i right?
 
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You start with 20g + 20g = 40g of reactants, is it possible to produce 180g of water?
 
Borek said:
You start with 20g + 20g = 40g of reactants, is it possible to produce 180g of water?

the nhow do i do it?
 
What if you start calculations with oxygen?
 
Start by finding out the limiting reagent. :)
 
Sigh. I did my best to not use this term as a hint.
 
Borek said:
Sigh. I did my best to not use this term as a hint.

Sorry Borek. :)
 

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