Question

calculate the number of molecules of sulphur present in 16 gram of solid Sulphur​

Answer 1

1 mole of solid sulphur (S8) = 8 x 32 g = 256 gi.e., 256 g of solid sulphur contains = 6.022 x 1023 molecules
Then, 16 g of solid sulphur contains = 6.022 x 1023 / 256 = 16 molecules
= 3.76375 x 1022 molecules



Hope it helps...
Please mark my answer as the brainliest...

Answer 2

⪼ Correct Question :-

Calculate the number of molecules of sulphar$\rm\:(S_8)$ present in 16 g of solid sulphar.

⪼ Solution :-

$\rm\:Molar\:mass\:of\:S_8=256\:g/mol$

$\rm\:No.of\:mole\:of\:S_8=\dfrac{16\:g}{Molar\:mass\:of\:S_8}$

$\rm\:No.of\:mole\:of\:S_8=\dfrac{16\:g}{256\:g/mol}$

$\rm\:No.of\:mole\:of\:S_8=\dfrac{16}{256}\:mol$

No.of molecules in the sample = No.of mole of $\rm\:(S_8)$ × Avogardo's number

$\rm\longrightarrow\:\dfrac{16}{256}\times\:6.022\times\:{10}^{23}$

$\rm\longrightarrow\:3.76\times\:{10}^{22}\: molecules$

$\purple{\bigstar}\:\:\underbrace{\bf\pink{{More}}\:\green{{Information}}}$

➝ Molecular mass :- The molecular mass of a substance is a number which indicates how many times the mass of one molecule of carbon the substance is heavier than the mass of 12th part of C¹².

➝ Mole :- According to the mole Concept,mole is a unit which expresses 6.022 × 10²³ particles.

• 1 mole atom = 6.022 × 10²³ atoms.

• 1 mole molecules = 6.022 × 10²³ molecules.

• 1 mole ion = 6.022 × 10²³ ions.

➝ [ Note ] :- Number 6.022 × 10²³ is also called Avogardo's number.Therefore mole is a symbol of number and mass both.