Blog

Given the accompanying partial activity series, predict which of the following will react with cobalt, Co.   Zn –>Zn2+ + 2e– Fe –> Fe2+ + 2e– Co –> Co2+ + 2e– Ni –> Ni2+ + 2e– Cu –> Cu2+ + 2e–  

A neutral carbon atom has                   valence electrons.

Write the balanced net ionic equation for the reaction consisting of the two half-reactions given. Cu –> Cu2+ + 2e– Au3+ + 3e––> Au

The Lewis structure of the cyanide ion is shown here.  How many valence electrons are in this ion?  -1:C = N:  

  In H3C-BCl2 , which atom does NOT have a complete valence? ( Hint: you may need to draw the Lewis structure first)

ClO2⁻  ion    1 pts: Draw the lewis structure of the ion shown above 2 pts. Calculate the number of valence electrons: Show your work  2 pts. Calculate the formal charge of Cl. 2 pts. Calculate the formal charge for each Oxygen.

Energy is often stored in the form of chemical bonds.  This is a type of ___.

Consider the reaction below. How much heat is absorbed if 5.00 moles of nitrogen react with excess oxygen? 2 N2 (g) + O2 (g) –> 2 N2O (g)     ΔHrxn =  +163.2 kJ    

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–