Chlorofluorocarbon rises to the stratosphere and O a. after interacting with UV energy, becomes free radicals, destroying Ozone O b. Become free radicals that react with oxygen to create Ozone oc. react directly with the stratospheric Ozone to destroy O d. react with free radicals to remove carbon dioxide​

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 

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now