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Definition of chemical reaction?
A chemical reaction is a process that involves the rearrangement of atoms in molecules to form new substances with different properties. This typically involves breaking existing chemical bonds and forming new ones. It is governed by the law of conservation of mass, meaning that the total mass of the reactants must equal the total mass of the products.
Is melting of lead a chemical reaction?
No, melting of lead is a physical change, not a chemical reaction. A chemical reaction involves the breaking and forming of chemical bonds to create new substances, while melting only involves a change in state from solid to liquid with no change in chemical composition.
Is it a chemical or physical change when oxygen is incorporated into hemoglobin to bring it to the cells?
This is a chemical change. When oxygen binds to hemoglobin, it forms a new compound with a different chemical composition. This process involves breaking and forming chemical bonds.
Elements combined to form compounds is a chemical change?
Yes, the combination of different elements to form compounds involves a chemical reaction, which is a type of chemical change. This process typically involves the breaking and forming of chemical bonds between the atoms of various elements to create new substances with different properties.
Why is a phase change not a chemical reaction?
A phase change is a physical change that involves rearranging the molecules in a substance without changing its chemical composition. In contrast, a chemical reaction involves the breaking and forming of chemical bonds, resulting in the formation of new substances with different chemical compositions.
Definition of chemical reaction?
A chemical reaction is a process that involves the rearrangement of atoms in molecules to form new substances with different properties. This typically involves breaking existing chemical bonds and forming new ones. It is governed by the law of conservation of mass, meaning that the total mass of the reactants must equal the total mass of the products.
What type of change when a substance changes into a new substance?
chemical
What is chemical rection?
A chemical reaction is a process where one or more substances (reactants) are transformed into different substances (products) by breaking and forming chemical bonds. This process involves the rearrangement of atoms and the breaking or forming of chemical bonds.
Forming acid rain a chemical or physical change?
Forming acid rain is a chemical change because it involves the reaction of sulfur dioxide and nitrogen oxides with water, oxygen, and other chemicals in the atmosphere to produce sulfuric acid and nitric acid.
Is melting of lead a chemical reaction?
No, melting of lead is a physical change, not a chemical reaction. A chemical reaction involves the breaking and forming of chemical bonds to create new substances, while melting only involves a change in state from solid to liquid with no change in chemical composition.
Is it a chemical or physical change when oxygen is incorporated into hemoglobin to bring it to the cells?
This is a chemical change. When oxygen binds to hemoglobin, it forms a new compound with a different chemical composition. This process involves breaking and forming chemical bonds.
How can you tell when a chemical has reacted?
You can tell when a chemical reaction has occurred by observing changes in color, temperature, formation of a gas, or the formation of a precipitate. Additionally, a chemical reaction often involves the breaking and forming of bonds between atoms, resulting in the rearrangement of molecules.
Elements combined to form compounds is a chemical change?
Yes, the combination of different elements to form compounds involves a chemical reaction, which is a type of chemical change. This process typically involves the breaking and forming of chemical bonds between the atoms of various elements to create new substances with different properties.
What makes up a chemical change?
A chemical change involves the formation of new substances with different chemical properties than the original ones. This can involve the breaking and forming of chemical bonds, resulting in a change in the composition and structure of molecules. Evidence of a chemical change includes the release or absorption of energy, color change, formation of a precipitate, or production of gas.
Why is a phase change not a chemical reaction?
A phase change is a physical change that involves rearranging the molecules in a substance without changing its chemical composition. In contrast, a chemical reaction involves the breaking and forming of chemical bonds, resulting in the formation of new substances with different chemical compositions.
Is burning magnesium oxide a chemical change or physical?
Burning magnesium oxide is a chemical change because it involves a chemical reaction where the magnesium oxide is converted to a new substance (magnesium oxide reacts with oxygen to form magnesium oxide). This process involves the breaking and forming of chemical bonds.
A chemical reaction is the change that takes place when two or more substances?
A chemical reaction is the process in which two or more substances interact to form new substances with different chemical properties. This process involves breaking and forming chemical bonds.
