Which of the following is an example of a neutralization reaction?

hcl (aq) + naoh (aq) àh2o (l) + nacl (aq)

mg (s) + 2h2o (l) àmg(oh)2 (aq) + h2 (g)

h2co3 (aq) àh2o (l) + co2 (g)

pb(no3)2 (s) + 2nai (aq) à pbi2 (s) + 2nano3 (aq)

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

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

How hot is the suns corona? (integrated science)