Why does burning wood leaves an ash that is only a small fraction of the mass of the original wood.?

Explanation:

Burning wood leaves an ash which is a small amount of original mass of wood because when we burn wood, large amount of wood is converted into carbon dioxide and water vapor. In complete combustion, there would be no ash remaining, because all the fuel have been consumed completely. When we sum up the mass of gasses released in burning and the ashes we get the original mass.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

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decision-making capabilities.

accountability.

delegation and empowerment.

creativity and innovation.

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