kilograms
The appropriate unit to measure weight is the newton. Now, if it is really the mass you wanted, you could use kilogram or gram.
What is the most appropriate instrument to measure
a centimeter
Litre.
The standard unit to measure mass is kilograms.
Meters
feet
The most appropriate metric unit to measure the mass of a concrete block is kilograms (kg).
feet
millimeter
Meters
Kilograms
kilograms
Kilograms are the most appropriate.
Litres.
Feet