The society of automotive engineers has established an accepted numerical scale to measure the viscosity of motor oil. for example, sae 40 motor oil has a higher viscosity than an sae 10 oil.
rank the following hydrocarbons by their expected viscosity.
rank from most to least viscous.
a. ch3ch2ch2ch2ch2ch3
b. ch3ch2ch2ch2ch2ch2ch2ch3
c. ch3ch2ch2ch2ch2ch2ch2ch2ch2ch3

Explanation:

Viscosity is defined as the ability of a liquid substance to oppose its flow. So, more is the mass of a liquid more will be its viscosity.

Since, the given option of hydrocarbons show different compounds. And, longer is the chain of hydrocarbon more will be its mass.

As a result, more difficulty it will face to flow. Therefore, it means greater will be the viscosity of hydrocarbon that has longer chain of carbon and hydrogen atoms.

Thus, we can conclude that given hydrocarbons are ranked from most to least viscous as follows.

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since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

i'm assuming that the correct answer is indeed the first one/ "a"..