In the molecular formula 4Al(OH)₃ - the number "4" is the and it tells you 1.Coefficient; how many atoms of aluminum there are
2.Coefficient; how many molecules of Aluminum hydroxide there are
3.Subscript; how many atoms of aluminum there are
4.Subscript; how many molecules of aluminum hydroxide there ar

2.coefficient how many molecules of Aluminum hydroxide there are

the correct answer is:

a. formation of precipitation

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.