How much does 1 mole of a substance weigh?
. o a. equal to its atomic number
• o b. 1 a. m.u.
• o c. 1 gram
. o d. equal to its atomic mass

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

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

When a septic tank backs up a goes in to clean it out