Hess’s original hypothesis was that sea-floor spreading is driven by deep mantle ____. 

The head of large plumes that form “hot spots” may cause uplift and ____. 

When seawater evaporates, its sodium and chlorine are electronically attracted to one another and crystallize into ___.       

Write a balanced chemical equation for the following combustion reactions.  (2 marks each) a)  The complete combustion of 2-butanol, C4H10O b) The incomplete combustion of butane, C4H10 (Hint: For balancing, the coefficient in front of the oxygen gas reactant will be 4 and the products will be H2O, CO2, CO, and C)

It is important to handle and store organic compounds, such as ethers, carefully because:

One of the main reasons that there are so many different organic compounds is:

The temperature-time graph above represents the distillation of a mixture of unknown alcohols and water. Explain how you can use a temperature-time graph of a distillation to determine what compounds are present in an unknown mixture.  (3 marks)

Consider the following pairs of reactants which will be mixed in solution: a)  K2S(aq)  +  CaBr2(aq)  –> b)  KOH(aq)  +  BaCl2(aq)  –> c)  Na3PO4(aq)  +  AgNO3(aq)  –> If the products include a precipitate, write the balanced chemical equation for the reaction (including all subscripts). If no precipitate will form write “no precipitate” after the reaction arrow.      (8 marks)

When applying NMES Russian to the anterior tibialis, which is the proper electrode placement? 

A patient is receiving NMES for strengthening.  What is the preferred on time & off time for the initial treatment?