Question

how many molecules of benzene are there in 1L of c6h6​

Answer 1

Explanation:

specific gravity of benzene is 0.88

specific gravity=(density of substance)/(density of water at 4°C)

Let density of benzene= X

⇒0.88= X/1      [density of water at 4°C= 1 gm/ml]

⇒X= 0.88

Density of benzene = 0.88 gm/ml

Mass = Density × Volume

⇒mass= 0.88 gm/ml × 1000 ml

⇒mass=880 gm

Molar mass of benzene= 72 + 6

                                       = 78

Moles of benzene= 880 gm/ 78 gm

                              = 11.282 moles

1 moles ⇒ 6.022 × 10^23 molecules

11.282 moles ⇒ 11.282 × 6.022 × 10^23 molecules

                       =6.79 × 10^24 molecules

answer: 6.79 × 10^24 molecules