When an acid solution exactly neutralizes a base
solution, which acid-base combination always
produces a mixture with a pH less than 7?
Select one
-a weak acid and a weak base
- a strong acid and a strong base
-a weak acid and a strong base
-a strong acid and a veak base

Calculate the enthalpy of the following reaction: 4 b (s) + 3 o2 (g) → 2 b2o3 (s) given the following pertinent information: (a) b2o3 (s) + 3 h2o (g) → 3 o2 (g) + b2h6 (g), δhoa = +2035 kj (b) 2 b (s) + 3 h2 (g) → b2h6 (g), δhob = +36 kj (c) h2 (g) + latex: \frac{1}{2} 1 2 o2 (g) → h2o (l), δhoc = −285 kj (d) h2o (l) → h2o (g), δhod = +44 kj

Which formula can be used to calculate the molar mass of hydrogen peroxide

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?