Question

rust is produced when iron reacts with oxygen and water. the chemical formula for the reaction is shown below. reaction of iron, water, and oxygen to produce rust
iron (solid) + water (liquid or vapor) + oxygen (gas) → iron(iii) hydroxide (solid)
chemical formula for rust reaction
4fe (iron) + 6h₂o (water) + 3o₂ (oxygen) → 4fe(oh)₃ (rust)
1 given this reaction, which statement correctly identifies the properties of the substances that are different between the reactants and the products?
a the reactant oxygen is a gas, while as a product oxygen is part of solid rust.
b the reactant iron is a solid, while as a product rust is a solid.
c the reactant water is a vapor, while as a product water is a liquid.
d the reactants are a solid, a liquid, and a gas, while the products are a solid and gas.
2 which table shows the total number of atoms in the reactants and the total number of atoms in the products for the chemical reaction?

Explanation:

Step1: Analyze question 1

Check each option against the reaction.

Step2: Evaluate option A

Oxygen is a gas reactant and part of solid - rust product. Correct.

Step3: Evaluate option B

Both iron reactant and rust product are solids, but this doesn't show difference. Incorrect.

Step4: Evaluate option C

Water can be liquid or vapor as reactant and is not a separate product. Incorrect.

Step5: Evaluate option D

Products are only solid (rust), no gas. Incorrect.

Step6: Analyze question 2

Count atoms in reactants and products from the balanced equation $4Fe + 6H_2O+3O_2
ightarrow4Fe(OH)_3$.

Step7: Count iron atoms

In reactants: 4 (from $4Fe$), in products: 4 (from $4Fe(OH)_3$).

Step8: Count hydrogen atoms

In reactants: $6\times2 = 12$ (from $6H_2O$), in products: $4\times3 = 12$ (from $4Fe(OH)_3$).

Step9: Count oxygen atoms

In reactants: $(6\times1)+(3\times2)=12$ (from $6H_2O$ and $3O_2$), in products: $4\times3 = 12$ (from $4Fe(OH)_3$).

Answer:

1. A. The reactant oxygen is a gas, while as a product oxygen is part of solid rust.
2. C.

Element	Reactants	Products
Hydrogen	12	12
Oxygen	12	12