Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.

 Molar mass of S8 sulphur = 256 g = 6.022 x 1023 molecule
Given the mass of sulphur = 16 g
Molecules of sulphur = (16 x 6.022 x 1023)/256
                                         = (96.35 x 1032)/256
                                          = 0.376 x 1023
                                          = 3.76 x 1022 molecules.

[Extra information: Molar mass is defined as the mass of a substance for a given amount where the amount of the substance refers to the number of molecules or atoms or compounds present in one mole of a substance. The SI unit of the Molar mass of a substance is always calculated in g/mol.
The chemical formula of the compound is a symbolic representation of its composition, e.g., the chemical formula of sodium chloride is NaCl.
It indicates the elements that are present in the compound and the ratio of these elements in the compound.]


Simply Easy Learning

Updated on: 14-Mar-2023


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