I. Completaţi enunţurile de mai jos: 1) Electronul distinctiv este electronul prin care .
2) Principiul lui Pauli precizează că .
3) Orbitalii monoelectronici sunt aceia care conţin .
4) Izotopii sunt specii de atomi care au acelaşi dar diferă prin .

how to make a simple air condition

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