Two unknown compounds made of P and Cl are tested. Compound 1 contains 3.097g of phosphorus and 10.63 g of chlorine. Compound 2 contains 1.548 g of phosphorus and 8.863g of chlorine. Show that this
experimental data follows the law of multiple proportions

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.