Question

a sample of unknown liquid is weighed in a graduated cylinder and the mass is 240.56 g. The empty graduated cylinder weighs 172.21 g. The volume of the liquid is 38.54 mL. What is the density of the liquid?

Answer 1

Step 1: Explanation

Density is defined as measure of mass per unit volume.

i.e Density = Mass / Volume

Step 2: Extract the data from question

Given,

Mass of Empty Graduated cylinder = 172.21 g

Mass of Empty Graduated Cylinder + Liquid = 240.56 g

So, Mass of liquid = (Mass of Empty Graduated Cylinder + Liquid ) - ( Mass of Empty Graduated cylinder )

=> Mass of liquid = 240.56 g - 172.21 g = 68.35 g

Volume of liquid =38.54 mL

Step 3: Calculation of density

on substituting the value

Density = Mass / Volume

=>Density = 68.35 g / 38.54 mL

=> Density = 1.77 g/mL

Hence, the density of liquid = 1.77 g/mL