When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this difference in mass?(1 point) Responses There are more iron atoms in iron oxide than in pure iron. There are more iron atoms in iron oxide than in pure iron. Iron oxide has oxygen atoms, and pure iron does not. Iron oxide has oxygen atoms, and pure iron does not. The iron atoms in iron oxide have more mass than pure iron. The iron atoms in iron oxide have more mass than pure iron. The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron. The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron.

Answer 1

The correct statement that explains the difference in mass between iron and iron oxide is: Iron oxide has oxygen atoms, and pure iron does not.

When iron rusts, it reacts with oxygen in the environment to form iron oxide, which includes these additional oxygen atoms, thus increasing the overall mass compared to pure iron.

Answer 2

In the equation 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. The equation will produce three molecules of water. The equation will produce three molecules of water. It is not possible to produce water without leftover molecules. It is not possible to produce water without leftover molecules. Each oxygen molecule will combine with 2 hydrogen molecules with no leftover molecules.

Answer 3

If you change the equation from \(2H_2 + 1O_2 \rightarrow 2H_2O\) to \(3H_2\), the balanced equation becomes:

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

In this case, for every three molecules of hydrogen \(H_2\), you would need \(1.5\) molecules of oxygen \(O_2\) to fully react with all of the hydrogen molecules, producing three molecules of water \(H_2O\).

Therefore, the correct statement would be: The equation will produce three molecules of water.