Cobalt(II)chloride is commonly obtained from chemical supply houses as a hydrate with the formula CoCl2.6H2O. An analysis showed that 25.0g of this hydrate contains 11.3g of water. What us the present water by weight in this hydrate?

The present water by weight for the hydrate = 45.2%

Explanation:

From the given information;

The present water by weight = (weight of the water/ total weight of the hydrate) × 100

The present water by weight = (11.3/25) × 100%

The present water by weight = 0.452 × 100%

The present water by weight for the hydrate = 45.2%

c is the answer because when something is left after something evaporates that shows the chemical change.

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.