How are parentheses used in chemical formulas

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock