State whether each of the following samples of matter is a gas. If there is not enough information for you to decide, write “insufficient information.”
(a) A material is in a steel tank at 100 atm pressure. When the tank is opened to the atmosphere, the material suddenly expands, increasing its volume by 1%.
(b) A 1.0-mL sample of material weighs 8.2 g.
(c) The material is transparent and pale green in color.
(d) One cubic meter of material contains as many molecules as 1.0 m³ of air at the same temperature and pressure.