An expandable balloon contains 1800 L of He at 0.883 atm pressure and 25 ºC. At an altitude of 22 miles (temperature 2.6 ºC and pressure 2.8 torr), what will the volume of the balloon be?

What will most likely happen when two bromine atoms bond together?

What kind of intermolecular forces act between a hydrogen fluoride molecule and a hydrogen peroxide molecule? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.

Calculate the mass of 0.750 mol of the following substance. na3po4. , i'm not quite sure on how to set up the problem to solve! : (