Bromination of (z)? 3? hexene yields racemic 3,4? dibromohexane. provide a detailed mechanism for formation of the (3s,4s)? enantiomer, specifically showing br2 addition occurring from the top face of the alkene.

Br Br2 Br Br (3S,4S,)-dibromohexane (3R,4R.)-dibromohexane

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

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