Question

1. balance the following chemical equation and choose the correct answer below. h₂ + o₂ → h₂o 2h₂+o₂ → 2h₂o h₂+o₂ → h₂o 3h₂+o₂ → h₂o 4h₂+o₂ → 5h₂o

Explanation:

Step1: Count hydrogen and oxygen atoms on both sides

On the left - hand side of the unbalanced equation $H_2 + O_2
ightarrow H_2O$, we have 2 hydrogen atoms in $H_2$ and 2 oxygen atoms in $O_2$. On the right - hand side, we have 2 hydrogen atoms and 1 oxygen atom in $H_2O$.

Step2: Balance oxygen atoms

To balance the oxygen atoms, we need 2 moles of $H_2O$ on the right - hand side since there are 2 oxygen atoms on the left - hand side in $O_2$. So the equation becomes $H_2+O_2
ightarrow 2H_2O$. But now we have 2 hydrogen atoms on the left and 4 hydrogen atoms on the right.

Step3: Balance hydrogen atoms

To balance the hydrogen atoms, we put a coefficient of 2 in front of $H_2$ on the left - hand side. The balanced equation is $2H_2 + O_2
ightarrow 2H_2O$.

Answer:

$2H_2 + O_2
ightarrow 2H_2O$ (the fourth option)