2. Answer the following: a. When an aqueous solution of Pb(NO3)2 is mixed with an aqueous solution of NaI, a yellow precipitate forms.  What is the identity of this precipitate? b. What is the mass of BaCl2 in a 0.250 L bottle of 0.200 M BaCl2 solution? c. What is the bond angle exhibited in boron trichloride, BCl3?

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".