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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.

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn

What is the volume of 3.2 moles of chlorine gas (cl2) at 295 k and 1.1 atm?