When you combust hydrogen in air, the hydrogen will combine with oxygen to form water. Therefore, the hydrogen and oxygen are undergoing a chemical change to become bonded together producing H2O: 2H2 + O2 → 2H2O + Heat
It is both bumblehead. What do you mean by chemical or physical anyway?
Is it a chemical or physical change?*
It is a chemical change because whenever you burn something it is always a chemical change.
chemical..
it is chemical change
chemical
It is a Chemical change
No this is a chemical change- sodium reacts with chlorine gas to form sodium chloride and a lot of heat.
Chemical, producing hydrogen chloride which when added to water produces hydrochloric acid.
chemical
chemical
this is a chemical change.
Chemical
This is a chemical change.
It is a physical change because the chemical composition has not changed.
this is a chemical change.
Easy, chemical change.
burning in presence or absence of oxygen is a chemical change.
chemical change
It is a chemical change because of sodium and hydrogen bonds forming