What volume is occupied by 12.0 moles of gas at 3.5 atm pressure and t = 40 °c? (r = 0.0821 l atm/mole k)

Compare and contrast physical changes with chemical changes.

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.

Select the correct answer a modure consists of glucose and water. what is the percent composition of glucose in the mixture if it contains 1.3 moles of glucose (cho total mass of the mature is 276 grams? ) and the a 1775