Question

(i) Write the chemical symbols of two elements: (a) Which are formed from the first letter of the elements’ name. (b) Whose name has been taken from the names of the elements in Latin. (ii) Define Avogadro’s constant and molar mass. How are they related to one mole of an atom, molecule, or ion? Urgently required....

Answer 1

hydrogen h carbon c na- sodium potassium - kalium

Answer 2

The given questions can be answered as follows:

• Chemical symbols of two elements:

1. Formed from the first letter of the elements name: H (Hydrogen), B (Boron)
2. Whose name has been taken from the names of the element in Latin: Fe (Iron, Latin name - Ferrum), Cu ( Copper, Latin name - Cuprum)

• Avogadro's constant: The Avogadro's constant is a proportionality constant that has a fixed value of 6.023× 10²³ mol⁻¹. It denotes the amount of particles/constituents/atoms/molecules/ions present in 1 mole of a given substance.

                                          Nₐ = 6.023× 10²³ mol⁻¹

• Molar mass: The molar mass of a substance is the sum of all the masses of the constituent particles that leads to the formation of 1 mole of the given compound. Mathematically it is equal to the mass of the substance present divided by the moles of the substance.

                                       M = $\frac{m}{n}$

Where,

M = molar mass

m = mass of substance in grams

n = number of moles present

Avogadro's constant is the number of constituents present in 1 mole of an atom/molecule/ion.

Molar mass is the sum total of mass of constituents present in 1 mole of an atom/molecule/ion