In a titration, the endpoint of a neutralization reaction was reached when 37.6 milliliters of an hcl solution was added to 17.3 milliliters of a 0.250 m naoh solution. what was the molarity of the hcl solution?

The balanced equation for the reaction is as follows
NaOH + HCl --> NaCl + H₂O
stoichiometry of NaOH to HCl is 1:1
number of NaOH moles reacted - 0.250 mol/L x 0.0173 L = 0.00433 mol 
number of HCl moles reacted - 0.00433 mol
there are 0.00433 mol in 37.6 mL 
therefore in 1000 mL - 0.00433 mol / 37.6 mL x 1000 mL = 0.115 mol
molarity of HCl is 0.115 M

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 

Ibelieve it is b. proton.hope my answer has you : )