What is the correct charge of the cation in nickel (III) sulfide?

+3

+2

+1

-1

Compare and contrast physical changes with chemical changes.

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state. a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car