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Consider the equation 2 H2 + O2 → 2 H2O, what does the 2 in the coefficient of H2O molecule represent?
- a)number of particles
- b)the number of molecules
- c)number of moles
- d)number of atoms
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Consider the equation 2 H2 + O2 → 2 H2O, what does the 2 in the c...
Explanation:
Number of moles:
- The number 2 in the coefficient of the H2O molecule represents the number of moles of water produced in the reaction.
- In a balanced chemical equation, the coefficients of the reactants and products indicate the mole ratio in which the substances react and are produced.
- In this case, 2 moles of water (H2O) are produced for every 2 moles of hydrogen gas (H2) reacting with 1 mole of oxygen gas (O2).
Relationship between coefficients and moles:
- The coefficients in a balanced chemical equation represent the number of moles of each substance involved in the reaction.
- For example, if the coefficient of H2O is 2, it means that 2 moles of water are produced for every 2 moles of hydrogen gas reacting.
- This relationship allows chemists to predict the amount of products formed in a reaction based on the amounts of reactants present.
Significance of coefficient 2 in H2O:
- In the given equation 2 H2 + O2 -> 2 H2O, the coefficient of 2 in front of H2O indicates that 2 moles of water are produced for every mole of oxygen gas that reacts with 2 moles of hydrogen gas.
- This balanced equation shows the conservation of mass and the stoichiometry of the reaction, allowing us to understand the quantitative relationship between reactants and products.
By understanding the significance of coefficients in a chemical equation, we can determine the amount of substances involved in a reaction and make predictions about the outcomes of chemical reactions.
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Community Answer
Consider the equation 2 H2 + O2 → 2 H2O, what does the 2 in the c...
In a balanced thermochemical equation, the coefficients always refer to the number of the moles (but never molecules) of reactants and products involved in a reaction so 2 in the coefficient of H2O refers to the number of the moles of water.
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