Usually you would weigh it, on a device that is calibrated to show mass.
You would use grams.
its mass will increase by an amount too small to measure directly
Drop 10 coins of the same size and mass into a container filled with water, making sure that the water that overflows from the container is collected. Now measure the volume of the water overflow an multiply it with the density of water which is 1 kg/l. Now divide the total mass by 10 to get the mass of one coin.
The mass of any coin is typically measured in grams; the capacity or volume would be measured in millilitres.
Only if the items being measured are all identical. Otherwise you will lose the variation between individual items. It would be sensible to measure the mass of ten identical coins and take their average as a measure of the mass of a coin. But the average mass of ten people is not a more accurate measure of any of their masses.
When a coin ages it lowers the mass of a coin because usually some of the metal such as copper on a penny comes off the coin leaving it with a lighter mass then it started off with.
Mass is the measure of matter in an objevt
Scales either measure mass, or weight - but they are callibrated to show mass (for example, kilograms).
No, if you melt a coin it is still the same mass just in a different form.
a gradute is used to measure mass
You can't measure mass in meters. Meters is a measure of length, not mass
You measure mass in kilograms,grams,tonnes,short tons,pounds and ounces
You can measure mass.