The rate at which a candle burns in millimeters per minute is: qualitative theoretical quantitative hypothetical

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

Can someone me with questions 15 to 17 plz.

Describe the interaction that occurs between two objects with the same electrical charge.