4Fe+3O2→2Fe2O3
What happens to atoms of Fe and O2 during the reaction?
During the reaction, the atoms of Fe and O2 undergo a chemical transformation.
4 atoms of Fe react with 3 molecules of O2 (which contains a total of 6 atoms of O) to form 2 molecules of Fe2O3 (which contains a total of 6 atoms of O).
This means that each atom of Fe reacts with 3/2 atoms of O, leading to the formation of a new compound, Fe2O3.
So they are rearanged?
Yes, during the reaction, the atoms are rearranged to form new compounds. The iron (Fe) atoms combine with the oxygen (O2) molecules to form iron(III) oxide (Fe2O3). This rearrangement of atoms is a characteristic of a chemical reaction.
Do they gain mass?
During a chemical reaction, mass is conserved according to the law of conservation of mass. This means that atoms are rearranged, but no atoms are gained or lost during the reaction. Therefore, the total mass of the reactants (Fe and O2) is equal to the total mass of the products (Fe2O3).
Which is most likely to occur during a chemical reaction?
During a chemical reaction, several possible changes can occur. Here are some common changes that are likely to happen:
1. Formation of new compounds: Reacting elements or compounds combine to form new compounds with different properties.
2. Rearrangement of atoms: Atoms are rearranged to form new compounds, resulting in the breaking and formation of chemical bonds.
3. Changes in energy: Chemical reactions often involve the absorption or release of energy in the form of heat, light, or electrical energy.
4. Change in physical properties: The reaction may result in changes in color, odor, temperature, state of matter, or other observable physical characteristics.
5. Conservation of mass: The total mass of all substances involved in the reaction remains the same before and after the reaction.
It's important to note that the specific changes observed in a chemical reaction depend on the reactants and the conditions under which the reaction occurs.
NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2
A student mixes baking soda (NaHCO3
) and acetic acid (HC2H3O2
) to produce a chemical reaction shown. Which statement about the reaction is correct?
The correct statement about the reaction is that it produces NaC2H3O2 (sodium acetate), H2O (water), and CO2 (carbon dioxide).
In the reaction, baking soda (NaHCO3) reacts with acetic acid (HC2H3O2) to produce sodium acetate (NaC2H3O2), water (H2O), and carbon dioxide (CO2). This reaction is commonly known as a double displacement reaction or an acid-base reaction.
The atoms of the reactants are regrouped during the reaction.
Some atoms gain mass after the reaction.
Atoms of Na are destroyed during the reaction.
There are more H atoms after the reaction.
Which one is the correct statement?