Which of the following characteristics can be written only in space B? (5 points) a Occurs in substances that have at least one non-metal b Occurs in substances that have a repeating lattice structure c Occurs in substances that have discrete molecular structure d Occurs in substances that have high melting points

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

answer7,570,82356 cubic centimeters;