Answer:
For the provided compounds, by decreasing chemical shift (ppm), the sequence from left to right is Benzene >> Cyclohexane >> Ethane (CH₂-CH₂) >> Methane (CH₄).
Explanation:
¹H-NMR spectrum, roughly, we can say that the more density of electron around the Hydrogen atom, the lower the shift is. So, in this case methane with the simplest structure, only one Carbon atom, does not cause much effect to reduce the density of electron around the hydrogen, so, it is the lowest.
Ethane and cyclohexane looks similar, but cyclohexane with the ring-structure, six carbon atoms, has more effect than ethane with only 02 carbon atoms. Benzene, with the aromatic ring, which has very strong negativity with electron, so it cause the density of electron on the surrounding hydrogen to be the lowest among the four provided compounds.
Relative measurements are units obtained from comparing one substance to another. From the choices, the relative measurements are bright and low. Ampere and liter belong to a group called absolute measurements including SI and English<span> units. </span>
They can cuz habitats to be destroyed by the abiotic factor of weather. Temperature can also affect an organism.
