If the horizontal and vertical components of a vector A are both have a magnitude of 4, what is the magnitude of vector A? Round your answer to the
nearest hundredth.

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

What is the temperature in degrees celsius of a substance with a tempature of 49k

How to tell if a molecule is polar or nonpolar with electronegativity