Please help. Will give Brainliest!!

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

What is the empirical formula for c4h8o2

What substance has a mass of 9.5g and volume of 2.1cm^3