II. Being polite with the Imperative

Which one of the following aqueous solutions would have the higher concentration of K+ (aq) ions? (Assume total solubility in water.)

Consider the equilibrium reaction: 2 N2O(g) ⇌ O2(g) + 2 N2(g). Which of the following will cause a shift in the equilibrium to the left? 1.  Remove N2O 2.  Remove O2 3.  Add N2

The first experiment that converted one element to another was performed in 1919 by Ernest Rutherford. An isotope of nitrogen was bombarded with a type of particle to get an oxygen atom as shown:  N + ?  → O + H Which type of particle was used to bombard the nitrogen atom (indicated by the question mark in the equation above)?

Consider a 1.0 × 10-7 M HCl solution and a 1.0 × 10-7 M NaOH solution. Which statement below is true?

Consider the following endothermic equilibrium reaction: Fe2O3 (s) + 3 H2 (g) ⇌ 2 Fe (s) + 3 H2O (g)Which of the following actions will result in a shift to the left (towards reactants)?

The Lewis structure below best represents what formula?   

Identify the equation for which Keq = 2.

For the reaction which is in equilibrium Ag2S(s) ⇌ 2Ag+(aq) + S2-(aq), what happens to the equilibrium position if aqueous ammonium sulfide is added?

How many grams of C4H10O can be melted by 2.00×103 J if ΔHfus=7.27 kJ/mol?