How many molecules of benzene ( C 6 H 6) are there in 1 L of benzene? Specific gravity of benzene is 0.88 . Express your answer in terms of 1024 molecules to the nearest possible integer.

Question

How many molecules of benzene ( C 6 H 6) are there in 1 L of benzene? Specific gravity of benzene is 0.88 . Express your answer in terms of 1024 molecules to the nearest possible integer. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Mw of benzene (C6 H6)=12 × 6+1 × 6=78 g 1 litre of benzene =1000 mL Mass of 1000 mL of benzene = volume × density =1000 × 0.88=880 g ∴ 78 g of benzene =6.023 × 1023 molecules 880 g of benzene =(6.023 × 1023 × 880/78) =6.795 × 1024 molecules. ⇒ 7

Q. How many molecules of benzene (C6​H6​) are there in 1L of benzene? Specific gravity of benzene is 0.88. Express your answer in terms of 1024 molecules to the nearest possible integer.

Mw​ of benzene (C6​H6​)=12×6+1×6=78g 1 litre of benzene =1000mL Mass of 1000mL of benzene = volume × density =1000×0.88=880g ∴78g of benzene =6.023×1023 molecules 880g of benzene=786.023×1023×880​ =6.795×1024 molecules. ⇒7

Q. How many molecules of benzene $(C_{6} H_{6})$ are there in $1 L$ of benzene? Specific gravity of benzene is $0.88.$ Express your answer in terms of $1 0^{24}$ molecules to the nearest possible integer.