Chemistry, 20.11.2020 17:10, estherboocx

2 Na (s) + Cl2 (g) → 2 NaCl (s) is an example of a physical or chemical change?

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Chemistry, 22.06.2019 12:00, sophiaa23

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.