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

Given the following balanced equation, determine the rate of reaction with respect to [SO2]. 2SO2(g) + O2(g) à 2SO3(g)

For the reaction  2C4H10(g)  +  13O2(g)  →  8CO2(g)  10H2O(g) ; ΔH° = -125 KJ/mol and ΔS°=+253 J/mol.K. This reaction is ……… Hint: Use ΔG = ΔH – TΔS ;     ΔG = change in Gibbs free energy;  ΔH = change in enthalpy; T = temperature in Kelvin and  ΔS = change in entropy.   ΔG < 0 for a spontaneous process Identify which of the following set of conditions give an overall negative value for  ΔG (spontaneous)

An alpha particle is a ……………… nucleus