Finding mass with density?
There is 21.1g of PLA. Density of PLA is 1.25g/mL. I need to find the volume of PLA to determine the mass it will weigh in aluminum. Density of aluminum is 27.g/mL. Thanks!
- Steve4PhysicsLv 71 month ago
Your value for density of aluminium is wrong, it is 2.70g/mL, not 27g/mL.
There are 21.1g of PLA, density = 1.25g/mL.
Volume = mass/density = 21.1g/(1.25g/mL) = 16.88mL
What is the mass of this volume of aluminium, density 2.70g/mL?
Mass = volume x density = 16.88mL x 2.70g/mL = 45.6g (rounded to 3 sig figs.)
The3 key formulae are:
Density = mass/volume
Volume = mass/density
Mass = volume x density