For the following reaction, 6.12 grams of phosphorus (P4) are mixed with excess chlorine gas . The reaction yields 21.5 grams of phosphorus trichloride . phosphorus (P4) ( s ) chlorine ( g ) phosphorus trichloride ( l ) What is the theoretical yield of phosphorus trichloride

27.1 gram

Explanation:

To calculate the moles :

The balanced chemical reaction is:

As is the excess reagent, is the limiting reagent as it limits the formation of product.

According to stoichiometry :

1 mole of  give = 4 moles of

Thus 0.0494 moles of give =  of

Mass of

Thus 27.1 g  is the theoretical yield of phosphorus trichloride

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.