Question

With the help of an activity show that there is no change in mass when a chemical change or reaction takes place.

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Answer 1

If we burn wood then it will convert into ash which is the remaining carbon and burning of wood is a chemical change. The if we add the weight of the carbon (ash)+the water vapours released(hydroxide)+the carbon dioxide=the weight of wood.

According to the law of conservation of mass, matter can neither be created nor destroyed, so the total quantity of matter, i.e., the total mass, before and after a change, remains the same. So, the mass of the substances, taken together, before and after a chemical change, will also remain same. From this, it can be concluded that any new substance formed during a chemical change is due to the rearrangement of the atoms of the original substance. The number of atoms of each kind remains the same, before and after the chemical change.

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Answer 2

Answer:

if we burn wood then it will convert into ash which is the remaining carbon and burning of wood is a chemical change. The if we add the weight of the carbon (ash)+the water vapours released(hydroxide)+the carbon dioxide=the weight of wood

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