Chemistry, 14.12.2021 01:00 MrJonezy4529

Which two observations are evidence that a chemical change is happening? A. A yellow liquid forms as a yellow solid is slowly heated.
I B. Bubbles of gas are released when a solid is combined with a
liquid.
I c. Solid crystals form as the temperature of a liquid is lowered.
D. Light and heat are given off after a spark ignites a substance,

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Which two observations are evidence that a chemical change is happening? A. A yellow liquid forms...