The bottom of a box has a surface area of 2.50 m2. the mass of the box is 51.5 kg. acceleration due to gravity at sea level is 9.80 m/s2. what is the pressure exerted by the box where it rests? 20.2 pa
131 pa
4.76 pa
202 pa

I believe the correct answer is D.

202 Pa (Pressure) <--- rounded up

You get this by multiply the acceleration by mass to get Force.  Pressure equals force divided by surface area.

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 

About 8 gallons of fuel will be used. (8.08)