A mixture of 143.7 g of P and 148.5 g of O 2 reacts completely to form P 4 O 6 and P 4 O 10 . Find the masses of P 4 O 6 and P 4 O 10 that are formed by the reaction.

thats a little if u want the answer just look it up on google thats what i do haha : )

what is the question here. i think you messed up.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol