Question

calculate the no. of S atoms in 2 mole of S8

Answer 1

molar mass of S8 = 32×8 = 256 g
so,
in one mole of S8 = 256 g of S8 = 6.022×10²³ molecules of S8 = 48.176×10²³ atoms of S
so,
in two moles of S8 = 48.176×10²³×2 = 96.352×10²³ = 9.6352×10²⁴ atoms of S

Answer 2

2 mole of $S_8$ contains $1.2044\times10^{24}$ atoms of S.

Given:

Number of moles = 2

To find:

No. of S atoms in 2 mole of $S_8$ = ?

Formula to be used:

No. of atoms = Moles × Avogadro's number

Calculation:

• As per the given condition, the number of moles is 2, whereas the standard value for Avogadro's number is $6.022\times10^{23}$.
• When these values are substituted in the following formula, it gives the number of atoms present in 2 moles of $S_8$.

No. of atoms = Moles × Avogadro's number

No. of S atoms = $2\times6.022\times 10^{23}$

No. of S atoms = $12.044\times10^{23}$

No. of S atoms = $1.2044\times10^{24}$

Conclusion:

From the above calculation it is inferred that, 2 mole of $S_8$ contains $1.2044\times10^{24}$ atoms of S.

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