Multiple Choice
In balancing the equation for the reaction X CO(g) + Y O2(g) → Z CO2(g), what are the correct values for the coefficients X, Y, and Z?
3. Chemical Reactions
Balancing Chemical Equations
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Which of the following sets of reactants correctly balances the chemical equation for the formation of water: 2H₂ + O₂ → 2H₂O?
A
2H₂ + O₂
B
2H₂ + 2O₂
C
H₂ + 2O₂
D
H₂ + O₂
Verified step by step guidance1
Identify the chemical equation for the formation of water: 2H₂ + O₂ → 2H₂O.
Understand that a balanced chemical equation has the same number of each type of atom on both sides of the equation.
Count the number of hydrogen and oxygen atoms on both sides of the equation: Reactants side has 4 hydrogen atoms (from 2H₂) and 2 oxygen atoms (from O₂), while the products side has 4 hydrogen atoms and 2 oxygen atoms (from 2H₂O).
Verify that the equation is balanced: The number of hydrogen and oxygen atoms are equal on both sides, confirming that 2H₂ + O₂ → 2H₂O is balanced.
Conclude that the set of reactants 2H₂ + O₂ correctly balances the chemical equation for the formation of water.
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