Why is it important for a measurement system to have an international standard ?

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

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

Draw the structure for 5-isopropyl-2-methyl-3-nonene