PLEASE HELP WITH QUESTION #5

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

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate