Classify the following as an element, compound, homogeneous mixture, or heterogeneous Mixture :
Iron and rust

A. Element
B. Compound
C. Homogenous mixture
D. Heterogenous mixture

Select the correct answer from each drop-down menu. daniel and sanya are scientists. daniel is studying whether the increasing frequency of tropical storms is affecting coastal erosion. sanya is investigating whether the discharge from industrial plants has any impact on the ph concentration of freshwater swamps in the surrounding area. which fields of science are daniel’s and sanya’s studies most closely related to? daniel’s field of study is related to science, and sanya’s field of study is related to .

What happens to energy in an open system?

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.