15 g sample of lithium reacts with a 15 g sample of fluorine gas to form lithium for a period after the reaction is complete what is the mass of each species left in the vessel? Li + F2 —>LiF

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?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Select all that apply. a beta particle: is electromagnetic energy is an electron has zero charge is emitted from the nucleus has a +2 charge has a -1 charge