Calculate the density of oxygen, O2, under each of the following conditions: STP
1.00 atm and 35.0 ∘C

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.