Question

The illustration to the left represents a mixture of phosphorus ( orange ) and fluorine ( green ) molecules.

Answer 1

In the image we can see that there are 1 phosphorus (P4) molecules and 7 fluorine molecules.

According to the stoichiometry of the reaction, one molecule of phosphorus (P4) and 6 molecules of fluorine (F2) are needed to form 4 molecules of PF3.

The answer is:

The limiting reagent is phosphorus (P4)

The number pf PF3 molecules formed is 4 and

The number of fluorine atoms/molecules in excess is 1.