The Mineral Pyrolusite Is a Compound of Manganese-55 and Oxygen-16

question 107

Multiple Choice

The mineral pyrolusite is a compound of manganese-55 and oxygen-16. If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?

• A)MnO
• B)Mn₂O
• C)Mn₂O₂
• D)MnO₂
• E)none of these

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Definitions:

Fibronectins

Glycoproteins of the extracellular matrix that bind to integrins (receptor proteins in the plasma membrane).

9 + 2 Arrangement

A common structure observed in eukaryotic flagella and cilia, consisting of nine double microtubule pairs surrounding two central microtubules.

Centrioles

Cylindrical structures in animal cells that play a crucial role in organizing microtubules during cell division.

Cytoskeleton

A complex network of interlinking filaments and tubules that extend throughout the cytoplasm in cells, providing structure and facilitating movement.