The Ka of hydrofluoric acid, HF, is 7.2 x 10-4. What [F-}/[HF] ratio is necessary to make a buffer of 2.84? a) 0.50
b) 2.0
c) 2.5
d) 1.4 x 10-3
e) 7.1 x 102

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What will most likely happen when two bromine atoms bond together?