8. When 2.24 g sample of a hydrate of calcium nitrate was heated, 0.54 grams of water was driven off. What is the formula and name of the hydrate of calcium nitrate?

Can someone me with questions 12 and 13 plz.

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point