Question

The molecular mass of octane is 14.22 g/mol. What is the mass of 22.05 mol of octane?

Answer 1

Hint: The mass of a molecule is measured in daltons and is called molecular mass. Because they contain various isotopes of an element, multiple molecules of the same chemical may have different molecular weights. The relative molecular mass is a unitless quantity. The molecular mass and relative molecular mass are not the same as the molar mass, but they are linked.

Complete answer:
The mole is the International System of Units' basic unit of material quantity (SI). It is defined as a collection of precisely $ \text{6}\text{.02214076x1}{{\text{0}}^{\text{23}}} $ particles, which may be atoms, molecules, ions, or electrons. The Avogadro number was set such that the mass of one mole of a chemical compound in grammes is numerically equivalent to the average mass of one molecule of the compound in daltons for most practical applications.
The molar mass is stated in $ g\text{ }mo{{l}^{-1}} $ and is defined as the mass of a particular substance divided by the quantity of that substance. When dealing with macroscopic (weighable) amounts of a material, the molar mass is typically the more suitable figure.
Octane is a hydrocarbon and an alkane with the chemical formula $ {{C}_{8}}{{H}_{18}} $ and the structural formula $ C{{H}_{3}}{{(C{{H}_{2}})}_{6}}C{{H}_{3}} $ in its condensed form. The quantity and position of branching in the carbon chain varies across structural isomers of octane. 2,2,4-trimethylpentane (also known as iso-octane) is one of these isomers and is used as one of the standard values in the octane rating scale. Octane is a gasoline component (petrol). Octane, like all low-molecular-weight hydrocarbons, is highly flammable and volatile.
 $ \text{Number of moles = }\dfrac{\text{Given Mass}}{\text{Molar Moles}} $
 $ \text{Mass = molar mass }\!\!\times\!\!\text{ mole = 14}\text{.22 }\!\!\times\!\!\text{ 22}\text{.05 = 313}\text{.551g} $ .

Note:
"Octane" is a short version of "octane rating" that is commonly used in the term "high octane." The capacity of octane's branched-chain isomers, particularly iso-octane, to withstand engine knock at high compression is measured by its "octane rating."