Question

How do you determine the molar mass of the helium?

Answer 1

Hint: As we know that the molar mass of a chemical molecule or a compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample which is measured in moles. The molar mass is not a molecular property of a substance but it is a bulk. So here we have to determine the molar mass of an element named Helium.

Complete answer:
Let us discuss about molar mass followed by the determination of molar mass of the helium as follows:-
-Molar mass: We know that molar mass of a chemical compound is referred to the mass of a sample of that compound divided by the amount of substance in that sample which is measured in moles. The molar mass is not a molecular property of a substance but it is a bulk. The molar mass is an average of many samples of that compound, which often varies in mass due to the presence of isotopes. Also for an element, the molar mass is its atomic weight in g/mol.
-Helium: It is a chemical element (denoted by He) that belongs to group 18 with the symbol He and atomic number 2. It is an odorless, colorless, tasteless, inert, non-toxic, monatomic gas and also the first in the noble gas group in the periodic table.
The atomic weight of helium in periodic tables is 4.002602.
-Hence the molar mass of the Helium is 4.002602 g/mol.

Note:
-Generally questions related to atomic weights and atomic numbers are easy to solve if we learn the periodic table along with the element’s atomic number.
-Also valency of helium has is zero and is chemically unreactive under all normal conditions of temperature and pressure.