Question

How many atoms are there in $2.0$ mole of $Si$?

Answer 1

We realize that the measure of substance having the very same number of atoms as are available in $12{\text{ }}g$ of ${C^{12}}$is known as mole. Moles is the proportion of the mass of substance in $g$ to the molar mass of the substance in $g/mol$. $1{\text{ }}mol$ of any substance contains $6.022 \times {10^{23}}$ atoms. $6.022 \times {10^{23}}$ is Avogadro's number.

Complete step by step answer:
Mole is determined as the amount of any substance comprising the same number of key units as the indistinguishable number of key units in unadulterated example of $^{12}C$ estimating precisely$12{\text{ }}g$.
One mole determines Avogadro's number of particles. i.e., ${N_A} = 6.022 \times {10^{23}} \cdot mo{l^{ - 1}}$. Avogadro's number of $12C$ particles, has a MASS of $12.0 \cdot g$ roughly.
Avogadro's number is along these lines the connection between miniature world particles, and atoms, which we can't see however whose presence we can deduce, with the full-scale universe of grams, and liters, and kilograms, that which we can quantify by certain methods in a lab.
We realize that $1{\text{ }}mol$ of any substance contains $6.022 \times {10^{23}}$particles. We are given $2.00$ moles of silicon. Accordingly,
Number of silicon atoms $= 2\;mol \times \dfrac{{6.022 \times {{10}^{23\;}}atoms}}{{1\;mol}}$
Number of silicon atoms $= 12.044 \times 1023{\text{ }}atoms$
Subsequently, $2.00$ moles of silicon contain $12.044 \times {10^{23}}$ atoms of silicon.

Additional Information:
The Avogadro's number is named after the researcher Amedeo Avogadro who found it. The Avogadro's number is otherwise called Avogadro's constant. It is indicated by ${N_A}$. The Avogadro's number is the proportionality factor that relates the quantity of constituent particles for example the quantity of particles or atoms or particles in a single mole of a substance. The Avogadro's constant is a dimensionless number.

Note: The quantity of atoms of a compound is Avogadro's number for $\;1$ mole of compound. The number $6.022 \times {10^{23}}$ is known as Avogadro's number. The Avogadro's number gives the quantity of atoms, particles or atoms present in one mole of any substance.