How is energy involved in what happens during a chemical reaction

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

What is the chemical formula for the compound formed between sodium and flour one

What is happening when the water inside a kettle heats up and begins to boil