How many miles of AlBr3 can form when 4.1 moles of HBr reacts with an Aluminum Hydroxide?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

In apex! a liquid heated beyond a certain temperature becomes

Which sample at stp has the same number of atoms as 18 liters of ne at stp