Astudent tested a sample of carbon (c) by combining it with water. there was no reaction between the carbon and water. the student concluded that carbon must be a group 18 element, since it was unreactive. state whether you agree with the student's reasoning, and explain why or why not.

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 grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

The ammonia molecule in the diagram has the observed bond orientation because