How does liquid mass differ from its weight?
Mass is the total amount of the liquid while weight is the total force by which the gravity is pullin it towards earth.
When finding the density of a liquid why must you first find the mass of the container holding the liquid?
What you really need to know is the mass of the liquid. You'll most likely measure it by weighing the liquid when it's in the container. The weight you measure will include the weight of the container, and you'll have to subtract that away in order to know the weight of the liquid alone. If you can figure out a way to weigh the liquid when it's out of the container, then you'll never need…
Mass is the amount of matter that an object contains. Weight is the amount of force that object produces due to gravity, so weight can fluctuate depending on how much mass there is and how much gravity there is (different on the moon than earth) but mass will remain constant no matter where the object is.
The vast majority of liquids have different densities. The weight of a liquid depends on the force of gravity and the mass of the liquid. The mass of a liquid depends on the volume of liquid and the density of liquid. Therefore, the vast majority of liquids have different masses, densities and corresponding weights.
Because when you want to measure the weight of some liquid inside the cylinder, you put the whole thing on the scale, but the weight you read off the scale is not the weight of the liquid. It's the combined weight of the liquid PLUS the weight of the cylinder. In order to know the weight of the liquid alone, you have to take away the weight of the cylinder, and THAT'S why you need…