Using the Measured Mass Density of 2

question 7

Multiple Choice

Using the measured mass density of 2.48 g/cm³,and the molar mass of 58.098 g for KF,the equilibrium spacing between the K⁺ and F^- ions is

• A)0.168 nm
• B)0.196 nm
• C)0.269 nm
• D)0.293 nm
• E)0.312 nm

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Definitions:

Emergence of Land Plants

The period in Earth's history when plants first developed and colonized land, around 500 million years ago during the Ordovician period.

Wattieza

An extinct genus of trees from the Middle Devonian period, recognized as one of the earliest known trees and an important part of Earth's prehistoric forests.

Fungi Fossils

Preserved remains or traces of fungi that provide insights into the evolution and historical biodiversity of fungal species.

Earliest Animal Fossils

The oldest known remains of animals, providing insights into the appearance and evolution of early life forms on Earth.