Question

Number of molecules in 9.36g of benzene

Answer 1

$\huge\underline{\underline{\bf \green{Question-}}}$

Number of molecules in 9.36g of benzene.

$\huge\underline{\underline{\bf \green{Solution-}}}$

✰$\large{\boxed{\bf \blue{Mole(n)=\dfrac{Mass}{Molecular\:Mass}}}}$

Molecular Mass of benzene = 6 × 12 + 12

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 78 g

$\implies{\sf n=\dfrac{9.36}{78} }$

$\implies{\sf n = 0.12\:g}$

✪$\large{\boxed{\bf \blue{No.\:of\: molecule=nN_A}}}$

$\implies{\sf 0.12×6.023×10^{23} }$

$\implies{\sf 0.72×10^{23}}$

$\implies{\bf \red{No.\:of\: molecule=7.2×10^{22}} }$

$\huge\underline{\underline{\bf \green{Answer-}}}$

Number of molecules in 9.36g of benzene is ${\bf \red{7.2×10^{22}}}$

Answer 2

Answer:

No. molecules in 9.36 benzene is 22×10^22