2. Describe how you can use anhydrous copper sulphate to test for water. What colour is anhydrous copper sulphate and what colour would it turn if water is added to it.

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand