Which number best approximate the value of this expression

             Have you prayed yet?  You should before you start this exam.  Good Luck!!!                             

Which of the following is an acceptable Lewis structure for C3H6O?

Name this compound: Pt3(PO4)4 Pt is platinum. (Hint: first determine whether Pt is a type I or type II metal)  

What is the volume of 0.255 mole of helium with a pressure of 74.8 atm at 280. K. (R= 0.0821 L ∙ atm / mol ∙ K) A) 0.155 L B) 0.784 L C) 0.0842 L D) none of the above

The formula of lithium oxide is Li2O.  The formula of Ruthenium(IV) bromide is RuBr4.  What is the formula of the compound formed if the Ruthenium and oxide from the above combine?      (a)  Ru2O                   (b)  RuO                 (c)  RuO4                  (d)  Ru2O4                   (e)  RuO2

Which of the following pair of molecules below can have hydrogen bonding? (a)  HBr  + H2O                 (b)  HF + HBr                  (c) NH3  + HF                   (d)  H2O  + CH4               

How many molecules of acetone in 11.0 moles of C3H6O?  

Mixing a solution of BaCl2 with a solution of K3PO4 will result in the formation of        (a)  solid           (b)  water       (c)  gas     (d)  no reaction occurs.

Which of the following statements is incorrect (wrong)?