Which is true about the dissolving process in water? A Polar solutes do not dissolve easily in water,
OB. Water molecules are attracted by solute ions at the surface of the solute.
OC Water molecules move throughout the solute
OD Solute molecules pull water molecules away from the surface.
Remaining time 29 minutes

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.

If 16.00g of hydrogen gas reacts with 126.73g of oxygen, how many grams of water are yielded? (both reactants are completely consumed in the reaction.)

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays