If the molar mass of the compound is 96.69 g/mol,

what is the molecular formula of the compound?

NiF2

NiF

Ni2F4

NiF2

Explanation:

The atomic weight (PA) is the average weight of the masses of the natural isotopes that make up a chemical element. The term refers to the relative atomic mass possessed by the atoms of each of the chemical elements.

One of the first units of the atomic weight, uma, was expressed in 1/16 (0.0625) of the weight of an oxygen atom.

This unit changed with the discovery of the existence of the natural isotopes of an element from 1912; therefore, the isotopes could no longer be ignored.

Currently, the standard unit of the atomic mass or dalton is 1/12 of the weight of the 12C isotope atom. This is more stable and abundant than 13C and 14C.

A unit of standardized atomic mass is the mass of a nucleon (a proton or a neutron) and equals 1 g / mol. This unification or standardization was performed with a C-12 atom to which 12 atomic mass units are assigned.

And so, the relative atomic weight or atomic mass can now be expressed in grams per one mole of atoms.

Molecular weight is the sum of the atomic masses of all atoms of a molecule of a specific compound. The atomic weight of an element is calculated by finding the weighted average mass of the mass of all isotopes thereof.

Calculation

Atomic mass:

- F: 18.9984 g/mol

- Ni: 58.6934 g/mol

Molecular formula: NiF2

Molecular mass: Ni (atomic mass) + F (atomic mass) * 2

58.6934 g/mol + (18.9984 g/mol) * 2

NiF2: 96.69 g/mol

NiF2

Explanation: Ni: 58,71 g/mol

F: 19 g/mol

58,61 + (19*2) = 96,71 g/mol