Among teenagers, what is the most commonly used substance?

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

Who discovered a pattern to the elements in 1869?

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.