Please answer as many question as possible ty

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Mercury turns to vapor at 629.88 k how much heat is lost 175 g of mercury vapor at 650 current condenses to a liquid at 297 ca mercury turns to weber at 629.88 kelvin how much he is lost 175 g of mercury vapor and 650 coming condensers to liquidate 297 kevin