The number of moles and atoms for MgN4(OSi2)3 is; 1mole and and 14atoms respectively.
The number of moles and atoms for 3MgH2O3 is; 3 moles and 18atoms respectively.
What is a mole of a substance
A mole put simply, is the base unit of amount of substance in the International System of Units. It is quantitatively defined as exactly 6.02214076×10²³ elementary entities, which may be atoms, molecules, ions, or electrons.
Hence, in MgN4(OSi2)3; since only one unit of the substance is given; Therefore, the number of moles is 1 and upon counting the number of individual atoms; the total number of atoms is; 14atoms
Similarly, in 3MgH2O3; since three units of the substance is given; Therefore, the number of moles is 3 and upon counting the number of individual atoms; the total number of atoms in one mole is 6 and in 3 moles is therefore; 18atoms.
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