Suppose a solution at 70 oC (degrees Celsius) contains 50 g NH4Cl/100 g of water. Based on the solubility curve shown here, what additional mass of NH4Cl would be required to saturate the solution at the same temperature? *

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

This drawing shows a human body system. what is the primary function of this body system?

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?