The relationships among which variable quantities are expressed by the ideal gas law equation? 1. pressure, volume, number of moles, mass

2. pressure, volume, temperature, number of moles

3. pressure, volume, temperature, molar mass

4. volume, temperature, number of moles, gas constant

Which statement is true about ionic compounds?

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.