ESCRIBA CADA UNA DE LAS SIGUIENTES CANTIDADES EN NOTACIÓN DE POTENCIAS DE 10 Y EL RESULTADO. a.- 4 x 6 x 105 x 7 x 10-3 =

b.- 2.8 x 10-5 x 6 x 10-9 =
9 x 10-10

c.- 5 x 1018 x 6 x 10-4 =

so what is the problem with your lab report and whats the subject of the lab report? i will you

the answer is c. nacl

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