Which one do you think gives the more accurate end-point pH titration or acid base titration and why?

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood. 

The phase where ice changes directly to gas is called sublimation