How did the discoveries of Black, Cavendish, and Rutherford change people's understanding of the make-up of air and of its relationship to liquids and solids?

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

Sugar is dissolved in water. which is the solute? sugar neither both water

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !