What is the mass of 0.25 mol of sodium chloride? (show working)

At stp, what is the volume of 1 mole of co2?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

All of the following are part of the biosphere except