Balance the following equations and state whether the reaction is a decomposition, single displacement, synthesis or double displacement reaction.  a)   HgO  –>  Hg   + O2  b)   Sr(OH)2  + Na2SO4 –> SrSO4  +  NaOH   c)   Mg  + HCl  –>  H2   +  MgCl 

If the % yield for a reaction is 60%, and the actual yield is 15g, what is the theoretical yield?

Given the equation: 2KOH + H2S –> K2S + 2H2O, if you had 4 mol KOH and 5 mol H2S, what would be the limiting reagent?

The number 6.02 x 10 23 describes which of the following:

The total number of atoms in one molecule of the compound sulphuric acid H2SO4 is:

An atom will lose or gain electrons to become stable. What is the name of this rule? 

What is devolution?

Write the balanced equation for the complete combustion of ethyne (C2H2). 

How many moles are there in 4.5 g of K?

Which of the following is considered a beneficial component of the stratosphere but a pollutant in the troposphere?