Which of the following is NOT an acid?A) HClO4B) HNO3C) HC2H3O2D) NH3E) none of the above

How much energy (q) is required to vaporize 188 g of butane (C4H10) at its boiling point, if its ΔHvap is 24.3 kJ/mol?A) 12.7 kJB) 78.8 kJC) 171 kJD) 2.19 kJE) 45.7 kJ

What volume of 3.00 M CH3NH2 solution is needed to provide 0.370 mol of CH3NH2?A) 0.901 mLB) 8.11 mLC) 123 mLD) 1110 mL

What is the concentration of the hydroxide ion (OH-) given that the concentration of the hydronium ion (H3O+) is 1.5 x 10-5 M? A) 6.7 x 10-10 M B) 1.5 x 109 M C) 1.0 x 10-14 M D) 1.0 x 10-19 M E) none of the above

Define equilibrium.A) no reactants reactB) no products are formedC) the rate of the forward reaction is faster than the rate of the reverse reactionD) the rate of the reverse reaction is faster than the rate of the forward reactionE) the rate of the forward reaction equals the rate of the reverse reaction

A 0.10 M solution of an electrolyte has a pH of 4.5. The electrolyte is:A) a strong acid.B) a strong base.C) a weak acid.D) a weak base.E) none of the above

Which of the following statements are TRUE of buffer solutions?     1. A buffer solution can be made by mixing equal concentrations of         C2H3O2 and NaC2H3O2     2. A buffer solution can be made by mixing equal concentrations of          HCl and NaCl     3. A buffer solution resists changes in pH when small quantities of acid          or base are added.A) 1 and 2 onlyB) 2 and 3 onlyC) 1 and 3 onlyD) All of 1, 2, and 3E) None of 1, 2, and 3

In Lhasa, Tibet, the elevation is 12,000 feet. The altimeter reading in an airplane is 19.50 in Hg. This pressure is equal to ________ mm Hg. (1 in. = 2.54 cm)A) 9.58B) 495C) 0.651D) 1.61E) 23.7

 A molecule can exhibit hydrogen bonding attractive force if it contains hydrogen covalently bonded to A)  fluorine, oxygen, or nitrogen.B)  chlorine, fluorine, or iodine.C)  sulfur, oxygen, or fluorine.D)  oxygen or nitrogen.E)  nitrogen, fluorine, oxygen, or nitrogen.

To make a 0.800 M solution, one could take 0.800 moles of solute and add A) 2.00 L of solvent.B) 2.00 kg of solvent.C) enough solvent to make 1.00 L of solution.D) enough solvent to make 1.00 kg of solution.