Question

A liquid in lab has a density of 1.24g/cm3. What is the mass in grams of 254mL of the liquid?

Answer 1

Mass= 314.96 grams

Step-by-step explanation:

The density of the substance is defined as mass per unit volume of it.

The formula is :

`density=(mass)/(Volume)`

Unit conversion:

1 liter = 1000 ml

`1dm^(3)=1Liter`

So

`1dm^(3)=1000ml`....(1)

`1dm^(3) = (10cm)^(3)`

`1dm^(3)=1000cm^(3)`

Replace The dm3 by cm3 in (1)

`1000cm^(3)=1000mL`

`1cm^(3)=1mL`

Volume = 254 mL = 254 cm3

Calculation of mass

`density=(mass)/(Volume)`

`1.24=(mass)/(254cm^(3))`

`mass=1.24* 254`

Mass= 314.96 grams(or 315 grams)

Note: Always makes same units before solving the question. You can not determine the mass if Volume is in mL and Density is in g/cm3. Change mL into cm3 first