How many molecules are in 2.50 moles of 02

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume

Which item is most likely part of the safety contract

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.