In the equation

Question

2H2+1O2→→2H2O

if you change the 2H2 to 3H2 molecules and balance the equation, identify which statement is correct?

(1 point)
Responses

The result of the equation will be the same.
The result of the equation will be the same.

Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules.
Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules.

It is not possible to produce water without leftover molecules.
It is not possible to produce water without leftover molecules.

The equation will produce three molecules of water.

Answer 1

To analyze the modified equation with \( 3H_2 \):

If we take the original equation:

\[ 2H_2 + O_2 \rightarrow 2H_2O \]

By changing \( 2H_2 \) to \( 3H_2 \), we get:

\[ 3H_2 + O_2 \rightarrow ? \]

To balance this new equation, we need to determine how many water molecules can be produced from \( 3H_2 \). Each water molecule requires \( 2H \) atoms. Therefore, with \( 3H_2 \) providing \( 6H \) atoms:

\[ 3H_2 + O_2 \rightarrow 3H_2O \]

Now, we also need to note that for \( 3H_2O \), we need \( \frac{3}{2}O_2 \) (which is equivalent to 1.5 O2 molecules).

Balanced equation:

\[ 3H_2 + \frac{3}{2}O_2 \rightarrow 3H_2O \]

This means we would need 1.5 molecules of \( O_2 \), but because we typically do not express fractions in balanced equations, we can multiply everything by 2 to avoid fractions:

\[ 6H_2 + 3O_2 \rightarrow 6H_2O \]

Now, examining the options given in the question, we can clarify:

1. The result of the equation will be the same. (Incorrect; changing \( H_2 \) changes the products.)
2. Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules. (Incorrect; that applies to the original equation but not when using 3 \( H_2 \)).
3. It is not possible to produce water without leftover molecules. (Incorrect; we can produce water with no leftovers if balanced correctly.)
4. The equation will produce three molecules of water. (Correct; it produces 3 \( H_2O \).)

Thus, the correct statement is:

The equation will produce three molecules of water.