The decomposition of water into hydrogen gas H2 and oxygen gas O2 can be modeled by the balanced chemical equation

since you want to produce H2O, clearly not B or D

Now, which other equation is balanced?

oops. Sorry. Not A or C. I read it backwards.

what im confused

is it d i think its d

Yes, D

2 H2O molecules have
4 H atoms or 2H2
and 2 O atoms

The balanced chemical equation for the decomposition of water into hydrogen gas H2 and oxygen gas O2 is option (B): H2O -> H2 + O2.

To determine the correct balanced equation, we need to follow a few steps:

Step 1: Identify the elements in the reactants and products.

In the given equation, the reactant is water (H2O), which consists of the elements hydrogen (H) and oxygen (O). The products are hydrogen gas (H2) and oxygen gas (O2).

Step 2: Count the number of atoms of each element on both sides of the equation.

On the reactant side (left side), there is one atom of oxygen and two atoms of hydrogen in water (H2O). On the product side (right side), there are two atoms of hydrogen and two atoms of oxygen.

Step 3: Balance the equation by adjusting the coefficients.

To balance the equation, we need to make sure the number of atoms of each element is the same on the reactant and product sides.

In this case, the equation is already balanced because there is an equal number of hydrogen and oxygen atoms on both sides:
- On the reactant side, there are two hydrogen atoms and one oxygen atom.
- On the product side, there are two hydrogen atoms and one oxygen atom.

Therefore, the correct balanced chemical equation for the decomposition of water is:
H2O -> H2 + O2.