The pressure of a 70.0 L sample of gas is 690. mm Hg at 20.0°C. If the temperature drops to 15.0°C and the volume expands to 90.0 L, what will the pressure of the gas be?

What are the major types of a chemical compound

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.