Question

Benzene, a chemical used in the manufacture of many products, has a

density of 0.8765 g/cm3. What would be the mass in mg of benzene if the
volume is 0.342 mL?
A. 89.9 mg
B. 390 mg
C. 2560 mg
D. 3340 mg
E. 300 mg

Answer 1

Answer: E. 300 mg

Step-by-step explanation:

To calculate the mass of benzene , we use the equation:

`\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}`

Given : Density of benzene =
`0.8765 g/cm^3`

Volume of benzene =
`0.342ml=0.342cm^3`
`1cm^3=1ml`

mass of benzene = ?

Putting in the values we get :

`0.8765 g/cm^3=\frac{\text{Mass of benzene}}{0.342cm^3}`

`{\text{Mass of benzene}}=0.300g=300mg` (1g=1000mg)

Thus the mass in mg of benzene is 300 if the volume is 0.342 mL