Combustion, or __________, is an example of one of the most familiar chemical changes. Melting of ice, likewise, is one of the most common e

Question

Combustion, or __________, is an example of one of the most familiar chemical changes. Melting of ice, likewise, is one of the most common examples of physical changes. When a piece of coal burns, combines with the carbon in the coal. The products are carbon dioxide gas, water vapor, and a lot of ash. After careful measurements are taken, the of the reactants (coal and oxygen) is to the mass of the products (carbon dioxide, water vapor, and ash). During the_________ reaction, the quantity of matter is unchanged. Similarly, when 10 grams of ice__________ , grams of water is obtained. Mass is_________ in this change as well.

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Orla Orla 3 years 2021-08-31T22:27:35+00:00 1 Answers 327 views 0

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  1. ngocdiep
    -1
    2021-08-31T22:29:07+00:00
    Reply

    Answer:

    a) Burning

    b) physical

    c) 10

    d) constant

    Explanation:

    Mass remains same in a physical reaction. It changes only in chemical reactions where some of the mass is lost as energy /heat.

    Thus, during combustion mass changes while during melting mass of water do not changes.

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