Determine the molar mass formed between a sodium ion and an iodine ion

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

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory