CH. 20, 0, 2,0 in the chemical reaction if 10 moles of H2O are produced,
bank moles of CO2 are also produced

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.