¿Cómo se escribe la fórmula molecular (orden de los iones)?

Smog is the term used to describe the combination of fog and smoke

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose