How can you separate a mixture containing two different liquids? filtration evaporation distillation magnetic attraction

Iam in desperate need of with this !

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

How many moles of bromine are needed to produce 3.23 moles of potassium bromide