Chemistry, 04.12.2021 20:30 dollaass17

Which TWO observations are evidence that a chemical change is happening? A. A yellow liquid forms as a yellow solid is slowly heated.

B. Bubbles of gas are released when a solid is combined with a liquid.

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...