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As a result of a chemical reaction with gas release.

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14y ago

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In a candle explain both changes using the big idea of energy?

When a candle is burnt a physical AND chemical change takes place. Its a physical change when the wax is being melted because the chemical structure has not change, meaning it cannot be a chemical change. Its also a chemical change because you are burning the string. When you burn something the chemical structure DOES change, meaning it is a chemical change.


If a piece of metal bubbles was place in acid is that a chemical change?

No, it is not a chemical change. For example, if you put gold bubbles into any single acid, no chemical change will take place.


What identifies a chemical change has taken place?

Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.


When cheese is cut into a slices does a chemical formula takes place.?

I assume you mean chemical "change" and the answer is no, it is a physical change that takes place.


What are facts about physical and chemical change?

Chemical changes take place on the molecular level


Is melting ice into water a chemical change?

No. It is a physical change. The chemical formula for water is H2O, and that is also the chemical formula for ice. So there is no chemical change taking place, only a change in the state of matter.


What kind of change that takes place when sugar is heated at a short time?

a chemical change take a place


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A chemical change has taken place


Is energy always given out when a chemical reaction takes place?

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This question doesn't make any sense, if you're trying to ask "How can you tell when a chemical reaction has taken place?" the answer would vary according to the chemicals, the concentrations of these chemicals and what conditions the reaction is taking place under. The next time you ask a question please be more specific and use correct grammar, thanks. A thought, you may also have been asking "How did this chemical reaction take place?" and that would also depend on the same variables.