Which of the following is an ionic compound formula​

C3h8o3 - glycerol major species present when dissolved in water

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.