1 One mole of a substance contains the same number of atoms or molecules as one mole of any other substance.
a Which contains more atoms: 56 g of Fe or 16 g of S? Show your working.

a) Fe contains more atoms.

Explanation:

To find the number of moles we divide by the molar mass:-

56g of iron (Fe) = 56/55.845 = 1.0028 moles

16g of Sulphur (S) = 16/32.06 = 0.6938 moles.

So 56g of Fe contains more atoms.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.