I need help With Chemistry 2). If 0.00100 moles of hydrogen gas at 155 C exert a pressure of 323 atm. What is the volume?

3). If 0.00100 moles of hydrogen gas at 155 C exert a pressure of 323 atm. What is the volume?

4. It is desired to obtain a volume of 1.00 dm3 of nitrogen at 100.C and 640 kPa. How many moles of nitrogen would be required?

5. Some oxygen is collected in a 0.250 dm3 container at 25.0C and 720. kPa. How many moles of oxygen is this

The correct answer is a

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