Question

Peak intensity from a mass spectrum gives you what information about a compound?

-The relative abundance of each ion proportional to the most intense (base) peak

-The mass of each fragment

-The total number of atoms present in each fragment

-The number of different isotopic forms present

-None of the answers shown are correct

When speaking of a chemical reaction, what is a transition state?

-It is the lowest energy form of a product from an exothermic reaction

-It is the conversion of a substance from one physical state to another

-It is the difference in energy between a reactant to a product

-It is a temporary, unstable, but high energy form of a molecule with partial bonds

Answer 1

Peak intensity from a mass spectrum gives the following information.

The relative abundance of each ion proportional to the most intense (base) peak.

TO Identify isotopic peaks intensity plays key role for example abundance of    ³⁵Cl [75.71%]

³⁷Cl [24.23%]    and⁷⁹Br [50.50%]    ⁸¹Br [49.50%] . these isotopes can be identify based their relative intensity ratio

The mass of each fragment

-The total number of atoms present in each fragment  

[M-1] AND [ M-2] Peaks highly helpfull in determination of No of carbons and No of Hydroges oresent hydrocarbon

-The number of different isotopic forms present.

ALL given statements are correct.

2) Transition state is a temporary, unstable, but high energy form of a molecule with partial bonds.

Example :In SN² reaction tranisition state is formed whici is unstable,subsequently converts into products[all bonds are in weak state]