an empty measuring cylinder weighs 100g. When it contains 20cm^3 of liquid it weighs 120 g. a) What is the density of the liquid?
Adding 20cm^3 of liquid added 20g of mass, so the density is
20g/20cm^3 = 1 g/cm^3
To find the density of the liquid, we need to use the formula:
Density = Mass / Volume
In this case, we know the mass of the liquid and the volume it occupies. We can calculate the mass by subtracting the weight of the empty measuring cylinder from the weight of the cylinder with the liquid.
Given:
Weight of empty cylinder = 100g
Weight of cylinder + liquid = 120g
Volume of liquid = 20cm^3
Calculating the mass of the liquid:
Mass of liquid = (Weight of cylinder + liquid) - (Weight of empty cylinder)
Mass of liquid = 120g - 100g
Mass of liquid = 20g
Substituting the values into the density formula:
Density = Mass / Volume
Density = 20g / 20cm^3
Finally, we have the density of the liquid:
Density = 1g/cm^3