Question

If $32g$ of sulphur has $x$ atoms,then the number of atoms in $32g$ of oxygen will be:

• A. $\frac{x}{2}$
• B. $2x$
• C. $x$
• D. none of these

Answer 1

Answer: (B)

$2x$

Atomic mass of sulphur is $32g(mol{)}^{-1}$. Therefore, number of moles of sulphur is 1 and it contains $6.022\times {10}^{23}$ atoms i.e avogadro's number. et number of sulphur atoms be $x$. Therefore, in 32g of oxygen it contains 2 moles as atomic mass of oxygen is $16g(mol{)}^{-1}$ and hence it will contain $2\times 6.022\times {10}^{23}$ atoms i.e $2x$