Of the following. which acids are weak acids? I. HBr II. HF III. HNO3 IV. HNO2 V. H2CO3 VI. H3AsO4

Which noble gas configuration (short hand notation) is correct for 49In115 (Indium)?

Write the molecular formula for an alkane with 4 carbons.  What is this hydrocarbon called?

Consider the following hypothetical chemical reaction     A  +  2B  →  E The mechanism for this reaction is: (1) 2A  +  B  →  C (slow) (2) B  +  C  →  D (fast) (3)          D  →  E  (fast) Which of the following is the correct rate law for this reaction?

Consider the following solubility equilibrium:                              MgCO3(s)⇄ Mg2+(aq) + CO32-(aq)            The addition of which of the following substances would decrease the solubility of MgCO3?

A solution contains equal concentrations of Hg2+(aq), Pb2+(aq) and Fe2+(aq) ions. When a solution of   S2-(aq) is slowly added to this solution, the precipitate which forms first is:  Use: HgS      Ksp = 1.6×10-54           PbS       Ksp = 7.0×10-29             FeSKsp = 3.7×10-19

What are the units of k in the following rate law?                Rate = k[X][Y]

Identify the missing  particle/element in the following reaction                                                   4219K →0-1e + _____

Calculate the molarity  (M) of a solution that contains 70.00 g of H2SO4 in 280.00 mL of solution Hint: concentration = moles / L

What is the concentration of the ions in 3.0 L of 1.0 MAl2(CO3)3?   Answer       [Al 3+]          [CO 3 2 -]      A 0.33 M 0.50 M B 0.66 M 0.99 M C 2.0 M 3.0 M D 3.0 M 4.5 M