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Which of the following chemical equations represents a balanced reaction?
2H2тАЛ + O2тАЛ \rightarrow 2H2тАЛO
H2тАЛ + O2тАЛ \rightarrow H2тАЛO
H2тАЛ + 2O2тАЛ \rightarrow 2H2тАЛO
4H2тАЛ + O2тАЛ \rightarrow 2H2тАЛO
2H2тАЛ + O2тАЛ \rightarrow 2H2тАЛO
A chemical equation is balanced when the number of atoms of each element is the same on both the reactant and product sides, satisfying the Law of Conservation of Mass. In 2H2тАЛ+O2тАЛтЖТ2H2тАЛO, there are 4 Hydrogen atoms and 2 Oxygen atoms on both sides.
A chemical equation is balanced when the number of atoms of each element is the same on both the reactant and product sides, satisfying the Law of Conservation of Mass. In 2H2тАЛ+O2тАЛтЖТ2H2тАЛO, there are 4 Hydrogen atoms and 2 Oxygen atoms on both sides.
Think of it like a sandwich recipe: if one sandwich requires two slices of bread and one slice of cheese, making two sandwiches requires exactly four slices of bread and two slices of cheese.
L-C-M (Law of Conservation of Mass) ensures Atoms count is always the same on both sides.
2H2тАЛ+O2тАЛтЖТ2H2тАЛO тАФ The balanced chemical equation for the formation of water.
тИСreactants=тИСproducts тАФ Law of Conservation of Mass.
The principle of mass conservation dictates that matter cannot be created or destroyed in a chemical reaction. During balancing, coefficients are adjusted to ensure the stoichiometric count of atoms remains constant: 2├Ч2=4 atoms of H and 1├Ч2=2 atoms of O on each side of the equation.
The Law of Conservation of Mass is the foundational principle for balancing equations.
Coefficients (the numbers in front of compounds) must be whole numbers.
Subscripts in chemical formulas cannot be changed when balancing the equation.
Allows for precise stoichiometric calculations.
Helps in predicting the yield of products in industrial synthesis.
Does not account for non-stoichiometric reactions.
Does not reflect the reaction kinetics or mechanism.
Industrial production of ammonia (Haber process).
Calculating fuel requirements for rocket propulsion.
Option B is incorrect because there are 2 Oxygen atoms in reactants but only 1 in products.
Option C is incorrect because it implies 4 Oxygen atoms in products but only 2 in reactants.
Option D is incorrect because it has 8 Hydrogen atoms in reactants but only 4 in products.
A is correct тАФ The equation 2H2тАЛ+O2тАЛтЖТ2H2тАЛO maintains an equal number of atoms for every element on both sides of the arrow.
Always balance Oxygen and Hydrogen atoms last in complex combustion reactions to save time during exams.