What is the molecular formula of a compound that is 40% sulfur and 60% oxygen by weight and has a molar mass of 400 grams? a.  S5O15 b.  SO3 c.  SO2 d.  SO

How many moles are in 2.1 x 1024 atoms of arsenic?  

Predict the products for the following equation: Na     +      CaCl2    –>        a)   Ca    +     NaCl b)   NaCa      +     Cl c)   Na2Ca      +     Cl2 d)   no reaction

The sharing of electrons is common in  ____

Match the equation with its type of reaction.  The numbers shown below should be subscripts not coefficients.

Symbols used in equations, together with the explanations of the symbols, are shown below.  Which set is correct?

When potassium hydroxide and barium chloride react, potassium chloride and barium hydroxide are formed.  The balanced equation for this reaction is ____ a.  KH  +   BaCl   –>   KCl     +   BaH b.  KOH  +  BaCl  –>  KCl   +  BaOH c.  2KOH  +  BaCl2  –>  2KCl   +   Ba(OH)2 d.  KOH  +  BaCl2  –>  KCl2  +   BaOH

Identify A [BLANK-1] s6.jpg

Identify the structure indicated by blue arrow [BLANK-1] s23.jpg

Identify the indicated structure (23) [BLANK-1] s32.jpg