A volcano erupts and lava flows for 10 miles before slowly cooling into solid rock. Is this change endothermic or exothermic

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

Which of the following is a physical property flammability heat of combustion solubility and toxicity

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.