Which of the following equations shows a chemical change? * O H20 (1)+ heat - H20(g)
O H20 (s) - H20 (1) + heat
Na20(s) + H20 (1) – 2Na+(aq) + 2OH- (aq) + heat
All of the above

What would you do if you told the guy you liked that you liked him

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

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?