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The dissolving of ammonium nitrate (NH4NO3 = 80.06 g/mol) in water can be described by the following: NH4NO3 (s) –> NH4NO3 (aq)                  DH = +25.4 kJ   How much heat will be absorbed when 175 g of sodium acetate dissolves in water?

Given the accompanying partial activity series, which of the following elements can reduce copper(II) to elemental copper? Zn –> Zn2+ + 2e– Fe –> Fe2+ + 2e– Co –>Co2+ + 2e– Ni –>Ni2+ + 2e– Cu –>Cu2+ + 2e–

The reaction between copper and hydrochloric acid is best represented by which of the following? * hint: look at the activity series 

A sample of ammonium chloride dissolves in water, absorbing heat from the surrounding water, and causing the temperature to drop by 20 °C.  If the heat change for the reaction is +300 J, what is the heat change for the surrounding water?

How much heat is released when 35.0 g of water are cooled by 40.0°C?  

Which balanced equation best describes this reaction?   image.png

Identify the compounds that are soluble  in water:

Given the following net ionic equation, select the correct pairing of half-reactions. Mg(s) + Zn2+(aq) à Mg2+(aq) + Zn(s) 

Considering the following net ionic equation: Mg + Fe2+ à Mg2+ + Fe the species oxidized is ___ and the oxidizing agent is ___.

Which of these has a net dipole?