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If a molecule decomposes, then it is a chemical change.
Like for water (H2O), It will look like this:
2 H2O -> 2H2 + O2
Since the actual original chemical changed, it is a chemical reaction.
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∙ 10y ago
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Is reacts with acid to from H2 a phsical property or a chemical property?
The reaction with acid to form H2 is a chemical property.
Is reacts with acid to form H2 a chemical or physical properties?
Chemical. If a new substance is produced it is a chemical change.
Are the physical and chemical properties of HCl different from those of H2 and Cl2?
Yes, HCl, Cl and H have very different chemical and physical properties.
Is calcium in water a physical or chemical change?
Adding calcium to water results in a chemical change because the calcium and the water that react are combined to form a distinct new substance, calcium hydroxide, that did not exist in either the calcium or the water before their reaction.
Is adding HCl to Mg and physical or chemical change?
Adding Hydrochloric acid to magnesium induces a chemical change, according to the reaction: Mg(s) + 2HCl(aq) > MgCl2(aq) + H2(g)
Reacts with acid to form h2 is physical or chemical property?
If a new substance has been produced it must be a chemical change.
Is reacts with acid to from H2 a phsical property or a chemical property?
The reaction with acid to form H2 is a chemical property.
Is reacts with acid to from h2 physical property or chemical property?
This reaction is chemically: acid (2H+) is converted tohydrogen (H2) by picking up 2 electrons from a reactive metal. This metal is changed to an ionic salt compound.
Is electricity seperateing water into h2 and o2 a physical or chemical change?
This is a chemical change. Chemical reactions are chemical changes.
Is reacts with acid to form H2 a chemical or physical properties?
Chemical. If a new substance is produced it is a chemical change.
Are the physical and chemical properties of HCl different from those of H2 and Cl2?
Yes, HCl, Cl and H have very different chemical and physical properties.
Why is mixing hydrochloric acid and sodium a chemical change?
It is a chemical change because the products, H2 and HCl, are completely different from the reactants in their physical and chemical properties.
Why is it chemical when water is separated into o2 and h2?
It is a chemical change (reaction) because the chemical composition of the products (O2 and H2) is different from the chemical composition of the water (H2O).
Is calcium in water a physical or chemical change?
Adding calcium to water results in a chemical change because the calcium and the water that react are combined to form a distinct new substance, calcium hydroxide, that did not exist in either the calcium or the water before their reaction.
What is the chemical formulae of hydrogen?
H2
Is a salt getting formed a chemical change or physical change?
I think it is a chemical change Forming underground it is a chemical change Salt forming from a saline solution for example h20 + NaCl --delta-> h2 + O2 + NaCl (This is not a balanced solution) This is a physical change, since there is no change to the Sodium Chloride
What is the chemical of hydrogen gas?
The chemical formula for Hydrogen gas is H2
