How can i solve these types of questions for stoichiometry? (explanation )

Will read the question and it and than answer

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab. 

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.