Hii

I need help w this

below

The answers there, i need an explanation

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2al(s)+3cl2(g)→2alcl3(s) what is the maximum mass of aluminum chloride that can be formed when reacting 32.0 g of aluminum with 37.0 g of chlorine? express your answer to three significant figures and include the appropriate units.

List four observations that indicate that a chemical reaction may be taking place

In a buffer system of hf and its salt, naf, the f- neutralizes added base the hf is not necessary the hf neutralizes added base the hf neutralizes added acid the f- neutralizes added h2o