. boiling 21.1 g of water at 100°C

What is the value of keq for the reaction expressed in scientific notation?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

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