Use use chemical weathering and a sentence

Weathering is the breakdown of rocks at the Earth's surface, by the action of rain water, extremes of temperature, and biological activity. It does not involve the removal of rock material. Chemical weathering is a type of weathering that is caused by chemical reactions. It is caused by rain water which breaks the bonds holding the rock together. From the question we are supposed to use chemical weathering in a sentence; Well there are many sentences we can create if we understand what chemical weathering is; For example; Rhizoliths are created through the process of chemical weathering, decomposition, reprecipitation and cementation. Once deposited, physical and chemical weathering can alter the state of preservation. Etc

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

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