Question

Which equation shows conservation of atoms? Group of answer choices 2 H2 + 2 O2 ---> H2O 2 H2 + O2 ---> 2 H2O H + O ---> H2O H2 + O2 ---> 2 H2O

Answer 1

Answer:

2 H₂ + O₂ → 2H₂O

Explanation:

• The equation that shows the conservation of atoms is the balanced one.
• In this case, the balanced equation is;

2 H₂ + O₂ → 2H₂O

Because it has 4 hydrogen atoms and 2 oxygen atoms on both sides of the equation.

• Chemical equations are balanced to obey the law of conservation of mass that requires the mass of the reactant to be equal to the mass of the products.
• Balancing chemical equations makes the number of atoms of each element in the equation equal, thus conserving the mass in the chemical reactions.