I NEED YOUR HELP GUYSSS Light can pass through different materials, including air, water, and glass. When light passes from one material to another material with a different density, its wavelength may change. However, its frequency does not change. Based on that information and the formula for the speed of a light wave, what can you say about the speed of light in materials of different densities? Explain your answer.

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

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

yes

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