Question

What is the molar mass of aspirin, ${C_9}{H_8}{O_4}$?

Answer 1

It can also be defined as the mass in grams of one mole, or $6.02 \times {10^{23}}$ particles of the substance. Molar mass is also molecular weight. Molar mass is calculated using the atomic masses of individual elements. The atomic mass of carbon $= 12.011$ , atomic mass of hydrogen$= 1.00794$and atomic mass of oxygen$= 16.00$.

Complete answer:
The molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample. Its unit is moles.
For calculating the molar mass of aspirin ${C_9}{H_8}{O_4}$ there are certain steps that need to be followed. Following are the steps:
Determine how many atoms of each different element are in the formula.
Look up the atomic mass of each element in a periodic table.
Multiply the number of atoms of each different element with the atomic mass for every element.
Finally, add all the numbers together.
Now using the following steps we will calculate the molar mass as aspirin.
The formula of aspirin is ${C_9}{H_8}{O_4}$
(Atomic mass of carbon $= 12.011$ , atomic mass of hydrogen$= 1.00794$and atomic mass of oxygen$= 16.00$)
${C_9}{H_8}{O_4}$
$\Rightarrow (9 \times$atomic mass of carbon)$+ (8 \times$atomic mass of hydrogen)$+ (4 \times$atomic mass of oxygen)
$\Rightarrow (9 \times 12.011) + (8 \times 1.00794) + (4 \times 16)$
$\Rightarrow (108.099) + (8.06352) + (64)$
$\Rightarrow 180.16252\dfrac{g}{{mol}}$
Therefore the molar mass of aspirin is $180.16252\dfrac{g}{{mol}}$

Note:
For calculating the molar mass of the compounds some points have to be taken into consideration:
The molar mass of the compounds should be accompanied by the formula of the particles.
The molar mass of a compound is determined by adding the atomic masses of all the elements in the compound.
The molar mass is also known as the molecular weight.