What is the identity of the planets?
Planet
Distance from Sun (km)
778,600,000
4,495,100,000
1,433,500,000
2,872,500,000

What are the statements?

It decreases by 4 is your answer mark brainliest 

Answerstudying coal cumbustion as an energy source;

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.