What is the volume that you should dilute 30ml of a 12.0m h2so4 solution to obtain a 0.160m h2so4 solution?

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

Ab c or d ? i’m not sure what the answer is

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!