SEP Construct an Explanation Gold leaf has been used by artisans since ancient times to cover objects with a decorative gold coating using only a small amount of the expensive metal. To make gold leaf, pieces of gold are pounded into extremely thin sheets. These sheets may be hundreds of time thinner than a human hair. Explain how the bonding in gold makes it possible to make gold leaf.

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a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.