The natural abundance of 13c is 1.1%. what are the relative peak heights of the m+ and m+1 peaks in the mass spectrum of decane? how do you know?

a. 100: 11
b. 89: 11
c. 100: 1.1
d. 1: 1.1

a. 100:11

Explanation:

M+1 peak is observed due to the presence of an isotope of an atom in a molecule. Decane has the molecular formula C₁₀H₂₂, so the probability of having 13C atom in this molecule increases ten times. This gives the ratio between M+ and M+1 peak 100:11.

It should be noted that the decane molecule also contains hydrogen atoms whose isotope deuterium (2H) can also be present in the molecule and give M+1 peak. But its relative abundance to protium (1H) is low i.e., 0.015, so its effect can be neglected.

A simple formula for the estimation of the relative peak height of M+1 in a molecule that contains C, H, N, O, F, Si, P, and S is:

PS: remove the element from the formula which is not present in the molecule

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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